TY  - GEN
AU  - Mitrović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2219
AB  - The influence of dopant concentration and sintering parameters on properties of Sb-doped BaSnO3 ceramics
	Jelena Mitrović1, Milica Počuča-Nešić1, Zorica Branković1, Goran Branković1	
1Institute for Institute for Multidisciplinary Research, University of Belgrade, Belgrade, Serbia
In recent years, the modern industry and technology development has focused on non-magnetic, non-inductive, and electroconductive materials that can be used in conditions unfavorable for metals and alloys, such as constant high voltage, current and energy, with a particular emphasis on operating in acidic and humid environments. These conditions could be satisfied using chemically inert and thermally stable ceramic resistors with linear current-voltage (I-U) characteristic and low and almost constant electrical resistivity in the wide temperature range. Barium stannate (BaSnO3, BSO) is perovskite-type oxide with almost ideal cubic crystal structure, good thermal and chemical stability. Undoped BSO exhibits semiconductor behviour, but doping with an appropriate concentration of antimony can lead to changes in the electrical properties of BSO, making its metallic-like conductor. 
In this study, we investigate the influence of antimony concentration and sintering parameters on properties of antimony-doped barium stannate, BaSn1-xSbxO3 (BSSO, x = 0,00; 0,04; 0,06; 0,08 and 0,10) to obtain conductive electroceramic samples with linear current-voltage (I-U) characteristic and constant electrical resistivity in the temperature range of 25 °C to 150 °C. Ceramic samples were obtained by three different sintering techniques conventional, spark plasma and cold sintering.
	XRD analysis confirmed the existence of single-phase cubic BaSnO3 in all conventionally sintered samples at 1600 °C for 3 h, and also in spark plasma sintered samples at 1100 °C for 5 min. However, the spark plasma sintering at 1200 °C for 5 min led to the formation of secondary phase, tetragonal Ba2SnO4 in BSSO samples, whose content is significantly decreased by Sb doping. On the other hand, XRD analysis revealed the presence of unreacted starting components, SnO2 and BaCO3 in cold sintered BaSn0.92Sb0.08O3 sample (310 °C for 5 min, 20 wt.% 1 M acetic acid). The presence of low angle grain boundaries (LAGBs) was observed in conventionally (1600 °C for 3 h) and spark plasma sintered (1200 °C for 5 min) samples with x = 0.08. The results of DC (I-U characteristic) and AC (Impedance spectroscopy) measurements confirmed the semiconducting properties of all BSSO sample, except the spark plasma sintered BaSn0.92Sb0.08O3 (1200 °C for 5 min) sample. Metallic-like behavior of this sample is manifested through the linear I-U characteristic and low electrical resistivity, which remained almost constant in the investigated temperature range, due to the loss of potential barriers at the grain boundary region as a consequence of LAGBs present in BaSn0.92Sb0.08O3 ceramic sample.
T2  - Shanghai Institute of Ceramics, Chinese Academy of Sciences
T1  - The influence of dopant concentration and sintering parameters on properties of Sb-doped BaSnO3 ceramics
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2219
ER  - 

@misc{
author = "Mitrović, Jelena and Počuča-Nešić, Milica and Branković, Zorica and Branković, Goran",
year = "2023",
abstract = "The influence of dopant concentration and sintering parameters on properties of Sb-doped BaSnO3 ceramics
	Jelena Mitrović1, Milica Počuča-Nešić1, Zorica Branković1, Goran Branković1	
1Institute for Institute for Multidisciplinary Research, University of Belgrade, Belgrade, Serbia
In recent years, the modern industry and technology development has focused on non-magnetic, non-inductive, and electroconductive materials that can be used in conditions unfavorable for metals and alloys, such as constant high voltage, current and energy, with a particular emphasis on operating in acidic and humid environments. These conditions could be satisfied using chemically inert and thermally stable ceramic resistors with linear current-voltage (I-U) characteristic and low and almost constant electrical resistivity in the wide temperature range. Barium stannate (BaSnO3, BSO) is perovskite-type oxide with almost ideal cubic crystal structure, good thermal and chemical stability. Undoped BSO exhibits semiconductor behviour, but doping with an appropriate concentration of antimony can lead to changes in the electrical properties of BSO, making its metallic-like conductor. 
In this study, we investigate the influence of antimony concentration and sintering parameters on properties of antimony-doped barium stannate, BaSn1-xSbxO3 (BSSO, x = 0,00; 0,04; 0,06; 0,08 and 0,10) to obtain conductive electroceramic samples with linear current-voltage (I-U) characteristic and constant electrical resistivity in the temperature range of 25 °C to 150 °C. Ceramic samples were obtained by three different sintering techniques conventional, spark plasma and cold sintering.
	XRD analysis confirmed the existence of single-phase cubic BaSnO3 in all conventionally sintered samples at 1600 °C for 3 h, and also in spark plasma sintered samples at 1100 °C for 5 min. However, the spark plasma sintering at 1200 °C for 5 min led to the formation of secondary phase, tetragonal Ba2SnO4 in BSSO samples, whose content is significantly decreased by Sb doping. On the other hand, XRD analysis revealed the presence of unreacted starting components, SnO2 and BaCO3 in cold sintered BaSn0.92Sb0.08O3 sample (310 °C for 5 min, 20 wt.% 1 M acetic acid). The presence of low angle grain boundaries (LAGBs) was observed in conventionally (1600 °C for 3 h) and spark plasma sintered (1200 °C for 5 min) samples with x = 0.08. The results of DC (I-U characteristic) and AC (Impedance spectroscopy) measurements confirmed the semiconducting properties of all BSSO sample, except the spark plasma sintered BaSn0.92Sb0.08O3 (1200 °C for 5 min) sample. Metallic-like behavior of this sample is manifested through the linear I-U characteristic and low electrical resistivity, which remained almost constant in the investigated temperature range, due to the loss of potential barriers at the grain boundary region as a consequence of LAGBs present in BaSn0.92Sb0.08O3 ceramic sample.",
journal = "Shanghai Institute of Ceramics, Chinese Academy of Sciences",
title = "The influence of dopant concentration and sintering parameters on properties of Sb-doped BaSnO3 ceramics",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2219"
}

Mitrović, J., Počuča-Nešić, M., Branković, Z.,& Branković, G.. (2023). The influence of dopant concentration and sintering parameters on properties of Sb-doped BaSnO3 ceramics. in Shanghai Institute of Ceramics, Chinese Academy of Sciences.
https://hdl.handle.net/21.15107/rcub_rimsi_2219

Mitrović J, Počuča-Nešić M, Branković Z, Branković G. The influence of dopant concentration and sintering parameters on properties of Sb-doped BaSnO3 ceramics. in Shanghai Institute of Ceramics, Chinese Academy of Sciences. 2023;.
https://hdl.handle.net/21.15107/rcub_rimsi_2219 .

Mitrović, Jelena, Počuča-Nešić, Milica, Branković, Zorica, Branković, Goran, "The influence of dopant concentration and sintering parameters on properties of Sb-doped BaSnO3 ceramics" in Shanghai Institute of Ceramics, Chinese Academy of Sciences (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2219 .

TY  - CONF
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - Vojisavljević, Katarina
AU  - Malešević, Aleksandar
AU  - Marinković Stanojević, Zorica
AU  - Počuča-Nešić, Milica
AU  - Mitrović, Jelena
AU  - Rostovtsev, Yuri
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2088
AB  - Numerous methods have been utilized for molecular detection, including optical, calorimetric, acoustic, and techniques based on changes in electrical properties, such as metal oxide semiconductor sensors [1,2]. Recent research endeavors have led to a significant rise in sensitivity, detecting parts per billion (ppb) [3], but the challenges of selectivity and cross-sensing remain crucial areas of investigation. Developing a gas sensor with high selectivity to efficiently analyze multi-gas mixtures would be of great significance, with potential applications in various fields such as technology, environmental control, biology, and medicine.
Quantum sensors are a promising new technology for the detection of gas mixtures. They offer a number of advantages over traditional methods, including high sensitivity, selectivity, and response time. In the presentation, we propose a new method based on the resonant interaction of dipole molecules with ac fields, in the presence of a dc electric and magnetic field that creates Zeeman and Stark splitting of molecular levels specific to certain molecules, ensuring selectivity [4].
In this talk, we present some preliminary experimental results obtained for the molecule NO on the use of quantum sensors for the detection of gas mixtures. Our results demonstrate the potential of quantum sensors for a variety of applications in gas sensing. We believe that quantum sensors have the potential to revolutionize the field of gas sensing.
1. X. Liu, et al. Sensors (Basel), 12 (2012) 9635–9665.
2. S. Lakkis, R. Younes, Y. Alayli, M. Sawan, Sensor Review, 34 (2014) 24–35.
3. J.-H. Lee, J.-Y. Kim, J.-H. Kim, S. S. Kim, Sensors (Basel), 19 (2019) 726.
4. Z. Branković, Y. Rostovtsev, Sci. Rep., 10 (2020) 1537.
PB  - University of Belgrade, Institute for Multidisciplinary Research
C3  - 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia
T1  - Quantum sensors for gas mixture detection
SP  - 43
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2088
ER  - 

@conference{
author = "Branković, Goran and Branković, Zorica and Vojisavljević, Katarina and Malešević, Aleksandar and Marinković Stanojević, Zorica and Počuča-Nešić, Milica and Mitrović, Jelena and Rostovtsev, Yuri",
year = "2023",
abstract = "Numerous methods have been utilized for molecular detection, including optical, calorimetric, acoustic, and techniques based on changes in electrical properties, such as metal oxide semiconductor sensors [1,2]. Recent research endeavors have led to a significant rise in sensitivity, detecting parts per billion (ppb) [3], but the challenges of selectivity and cross-sensing remain crucial areas of investigation. Developing a gas sensor with high selectivity to efficiently analyze multi-gas mixtures would be of great significance, with potential applications in various fields such as technology, environmental control, biology, and medicine.
Quantum sensors are a promising new technology for the detection of gas mixtures. They offer a number of advantages over traditional methods, including high sensitivity, selectivity, and response time. In the presentation, we propose a new method based on the resonant interaction of dipole molecules with ac fields, in the presence of a dc electric and magnetic field that creates Zeeman and Stark splitting of molecular levels specific to certain molecules, ensuring selectivity [4].
In this talk, we present some preliminary experimental results obtained for the molecule NO on the use of quantum sensors for the detection of gas mixtures. Our results demonstrate the potential of quantum sensors for a variety of applications in gas sensing. We believe that quantum sensors have the potential to revolutionize the field of gas sensing.
1. X. Liu, et al. Sensors (Basel), 12 (2012) 9635–9665.
2. S. Lakkis, R. Younes, Y. Alayli, M. Sawan, Sensor Review, 34 (2014) 24–35.
3. J.-H. Lee, J.-Y. Kim, J.-H. Kim, S. S. Kim, Sensors (Basel), 19 (2019) 726.
4. Z. Branković, Y. Rostovtsev, Sci. Rep., 10 (2020) 1537.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia",
title = "Quantum sensors for gas mixture detection",
pages = "43",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2088"
}

Branković, G., Branković, Z., Vojisavljević, K., Malešević, A., Marinković Stanojević, Z., Počuča-Nešić, M., Mitrović, J.,& Rostovtsev, Y.. (2023). Quantum sensors for gas mixture detection. in 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia
University of Belgrade, Institute for Multidisciplinary Research., 43.
https://hdl.handle.net/21.15107/rcub_rimsi_2088

Branković G, Branković Z, Vojisavljević K, Malešević A, Marinković Stanojević Z, Počuča-Nešić M, Mitrović J, Rostovtsev Y. Quantum sensors for gas mixture detection. in 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia. 2023;:43.
https://hdl.handle.net/21.15107/rcub_rimsi_2088 .

Branković, Goran, Branković, Zorica, Vojisavljević, Katarina, Malešević, Aleksandar, Marinković Stanojević, Zorica, Počuča-Nešić, Milica, Mitrović, Jelena, Rostovtsev, Yuri, "Quantum sensors for gas mixture detection" in 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia (2023):43,
https://hdl.handle.net/21.15107/rcub_rimsi_2088 .

TY  - CONF
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Malešević, Aleksandar
AU  - Zemljak, Olivera
AU  - Podlogar, Matejka
AU  - Drev, Sandra
AU  - Bernik, Slavko
AU  - Branković, Goran
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2074
AB  - Barium-stannate (BaSnO3, BSO) is a member of the perovskite-type alkaline
earth stannates ASnO3 (A = Ca, Sr, Ba) with an ideal cubic crystal structure (space
group: ). Doping with antimony (Sb5+) can change this wide band-gap
semiconductor (Eg = 3.1-3.4 eV) into an n-type semiconductor with high electrical
conductivity at room temperature. The major drawbacks in the BSO-based ceramics
synthesis are phase composition and low density of final ceramic materials. These
problems could be solved using spark plasma sintering (SPS), a current and
pressure-assisted technique, which enables the preparation of dense ceramics at
significantly lower temperatures and for a shorter time.
To investigate the influence of spark plasma sintering temperature on the
structural, microstructural and electrical properties of BaSn1-xSbxO3 (BSSO, x =
0.00; 0,04; 0.06; 0.08; and 0.10) ceramics samples, BSSO powders were spark
plasma sintered at 1100 °C, 1200 °C and 1250 °C for 5 min.
X-ray diffraction (XRD) analysis confirmed that all ceramic samples sintered at
1100 °C crystallized in a single-phased cubic BSO structure. Their relative densities
were in the range of 72–82% ρt. Sintering at 1200 °C increased the samples’ relative
densities to 79–96% ρt, but also induced the formation of a barium-rich secondary
phase, Ba2SnO4. Rising the sintering temperature further to 1250 °C induced the
melting of all samples except BaSn0.92Sb0.08O3. Field emission scanning electron
microscopy (FE-SEM) revealed that doping with antimony decreased the grain sizes
in BSSO samples sintered at 1100 °C and 1200 °C up to the concentration x = 0.08.
Electrical measurements revealed the typical semiconductor behavior of the
undoped samples, showing nonlinear current-voltage characteristic and the existence
of one semicircle in their impedance spectra, characteristic for materials with double
Schottky barrier at the grain boundaries. However, samples with higher dopant
concentrations (x = 0.08 and 0.10) showed significantly lower electrical resistivity
and linear current-voltage characteristic. The lowest and almost constant value of
electrical resistivity in the temperature range of 25–150 °C, and complete loss of the
semicircle in its impedance spectrum revealed the metallic-like behavior of sample
BaSn0.92Sb0.08O3 sintered at 1200 °C.
PB  - University of Belgrade, Institute for Multidisciplinary Research
C3  - 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia
T1  - The influence of spark plasma sintering temperature on the properties of Sb-doped barium stannate ceramics
SP  - 86
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2074
ER  - 

@conference{
author = "Vukašinović, Jelena and Počuča-Nešić, Milica and Malešević, Aleksandar and Zemljak, Olivera and Podlogar, Matejka and Drev, Sandra and Bernik, Slavko and Branković, Goran",
year = "2023",
abstract = "Barium-stannate (BaSnO3, BSO) is a member of the perovskite-type alkaline
earth stannates ASnO3 (A = Ca, Sr, Ba) with an ideal cubic crystal structure (space
group: ). Doping with antimony (Sb5+) can change this wide band-gap
semiconductor (Eg = 3.1-3.4 eV) into an n-type semiconductor with high electrical
conductivity at room temperature. The major drawbacks in the BSO-based ceramics
synthesis are phase composition and low density of final ceramic materials. These
problems could be solved using spark plasma sintering (SPS), a current and
pressure-assisted technique, which enables the preparation of dense ceramics at
significantly lower temperatures and for a shorter time.
To investigate the influence of spark plasma sintering temperature on the
structural, microstructural and electrical properties of BaSn1-xSbxO3 (BSSO, x =
0.00; 0,04; 0.06; 0.08; and 0.10) ceramics samples, BSSO powders were spark
plasma sintered at 1100 °C, 1200 °C and 1250 °C for 5 min.
X-ray diffraction (XRD) analysis confirmed that all ceramic samples sintered at
1100 °C crystallized in a single-phased cubic BSO structure. Their relative densities
were in the range of 72–82% ρt. Sintering at 1200 °C increased the samples’ relative
densities to 79–96% ρt, but also induced the formation of a barium-rich secondary
phase, Ba2SnO4. Rising the sintering temperature further to 1250 °C induced the
melting of all samples except BaSn0.92Sb0.08O3. Field emission scanning electron
microscopy (FE-SEM) revealed that doping with antimony decreased the grain sizes
in BSSO samples sintered at 1100 °C and 1200 °C up to the concentration x = 0.08.
Electrical measurements revealed the typical semiconductor behavior of the
undoped samples, showing nonlinear current-voltage characteristic and the existence
of one semicircle in their impedance spectra, characteristic for materials with double
Schottky barrier at the grain boundaries. However, samples with higher dopant
concentrations (x = 0.08 and 0.10) showed significantly lower electrical resistivity
and linear current-voltage characteristic. The lowest and almost constant value of
electrical resistivity in the temperature range of 25–150 °C, and complete loss of the
semicircle in its impedance spectrum revealed the metallic-like behavior of sample
BaSn0.92Sb0.08O3 sintered at 1200 °C.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia",
title = "The influence of spark plasma sintering temperature on the properties of Sb-doped barium stannate ceramics",
pages = "86",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2074"
}

Vukašinović, J., Počuča-Nešić, M., Malešević, A., Zemljak, O., Podlogar, M., Drev, S., Bernik, S.,& Branković, G.. (2023). The influence of spark plasma sintering temperature on the properties of Sb-doped barium stannate ceramics. in 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia
University of Belgrade, Institute for Multidisciplinary Research., 86.
https://hdl.handle.net/21.15107/rcub_rimsi_2074

Vukašinović J, Počuča-Nešić M, Malešević A, Zemljak O, Podlogar M, Drev S, Bernik S, Branković G. The influence of spark plasma sintering temperature on the properties of Sb-doped barium stannate ceramics. in 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia. 2023;:86.
https://hdl.handle.net/21.15107/rcub_rimsi_2074 .

Vukašinović, Jelena, Počuča-Nešić, Milica, Malešević, Aleksandar, Zemljak, Olivera, Podlogar, Matejka, Drev, Sandra, Bernik, Slavko, Branković, Goran, "The influence of spark plasma sintering temperature on the properties of Sb-doped barium stannate ceramics" in 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia (2023):86,
https://hdl.handle.net/21.15107/rcub_rimsi_2074 .

TY  - GEN
AU  - Mitrović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Malešević, Aleksandar
AU  - Branković, Zorica
AU  - Vojisavljević, Katarina
AU  - Savić, Slavica
AU  - Ribić, Vesna
AU  - Drev, Sandra
AU  - Podlogar, Matejka
AU  - Bernik, Slavko
AU  - Rapljenović, Željko
AU  - Ivek, Tomislav
AU  - Branković, Goran
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2085
AB  - The non-magnetic, non-inductive electroconductive materials with linear current-voltage characteristic and low and almost constant electrical resistivity in the wide temperature range could be used in conditions unfavorable for metals and alloys. Particular emphasis is placed on the performance and endurance of these materials in conditions at constant high voltage, current, and energy, as well as operating in acidic and humid environmental conditions.
The aim of this work was to investigate the influence of antimony concentration and sintering parameters on the structure, microstructure, and electrical properties of antimony-doped barium stannate, BaSn1-xSbxO3 (BSSO, x = 0,00; 0,04; 0,06; 0,08 and 0,10) to obtain conductive electroceramic samples with linear current-voltage (I- U) characteristics and low electrical resistivity. For this purpose three different sintering techniques were used: conventional, spark plasma and cold sintering.
According to the X-ray diffraction (XRD) analysis, single-phase ceramic mater- ials with cubic BaSnO3 structure were obtained by conventional sintering at 1600 °C for 3 h and spark plasma sintering at 1100 °C for 5 min. Raising the spark plasma sintering temperature to 1200 °C induced the formation of Ba-rich secondary phase, Ba2SnO4. XRD analysis confirmed the presence of unreacted SnO2 and BaCO3 in cold sintered BaSn0.92Sb0.08O3 sample (310 °C for 5 min, 20 wt.% 1 M acetic acid). Scanning electron microscopy (SEM) indicates a significant decrease in grain size upon doping, regardless of the sintering technique. High-resolution transmission electron microscopy (HRTEM) revealed the presence of low angle grain boundaries (LAGBs) in conventionally and spark plasma sintered (1200 °C for 5 min) samples with x = 0.08. The results of electrical measurements confirmed the semiconducting properties of all BSSO, except the spark plasma sintered BaSn0.92Sb0.08O3 (1200 °C for 5 min) sample. This sample showed linear current-voltage characteristic, the lowest and almost constant electrical resistivity in the temperature range of 25–150
°C resulting from the loss of potential barriers at grain boundaries due to the large fraction of LAGBs present in BaSn0.92Sb0.08O3 ceramic sample.
PB  - University of Belgrade, Institute for Multidisciplinary Research
T2  - 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia
T1  - Correlation between the microstructure and electrical properties of Sb-doped BaSnO3 ceramics
SP  - 36
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2085
ER  - 

@misc{
author = "Mitrović, Jelena and Počuča-Nešić, Milica and Malešević, Aleksandar and Branković, Zorica and Vojisavljević, Katarina and Savić, Slavica and Ribić, Vesna and Drev, Sandra and Podlogar, Matejka and Bernik, Slavko and Rapljenović, Željko and Ivek, Tomislav and Branković, Goran",
year = "2023",
abstract = "The non-magnetic, non-inductive electroconductive materials with linear current-voltage characteristic and low and almost constant electrical resistivity in the wide temperature range could be used in conditions unfavorable for metals and alloys. Particular emphasis is placed on the performance and endurance of these materials in conditions at constant high voltage, current, and energy, as well as operating in acidic and humid environmental conditions.
The aim of this work was to investigate the influence of antimony concentration and sintering parameters on the structure, microstructure, and electrical properties of antimony-doped barium stannate, BaSn1-xSbxO3 (BSSO, x = 0,00; 0,04; 0,06; 0,08 and 0,10) to obtain conductive electroceramic samples with linear current-voltage (I- U) characteristics and low electrical resistivity. For this purpose three different sintering techniques were used: conventional, spark plasma and cold sintering.
According to the X-ray diffraction (XRD) analysis, single-phase ceramic mater- ials with cubic BaSnO3 structure were obtained by conventional sintering at 1600 °C for 3 h and spark plasma sintering at 1100 °C for 5 min. Raising the spark plasma sintering temperature to 1200 °C induced the formation of Ba-rich secondary phase, Ba2SnO4. XRD analysis confirmed the presence of unreacted SnO2 and BaCO3 in cold sintered BaSn0.92Sb0.08O3 sample (310 °C for 5 min, 20 wt.% 1 M acetic acid). Scanning electron microscopy (SEM) indicates a significant decrease in grain size upon doping, regardless of the sintering technique. High-resolution transmission electron microscopy (HRTEM) revealed the presence of low angle grain boundaries (LAGBs) in conventionally and spark plasma sintered (1200 °C for 5 min) samples with x = 0.08. The results of electrical measurements confirmed the semiconducting properties of all BSSO, except the spark plasma sintered BaSn0.92Sb0.08O3 (1200 °C for 5 min) sample. This sample showed linear current-voltage characteristic, the lowest and almost constant electrical resistivity in the temperature range of 25–150
°C resulting from the loss of potential barriers at grain boundaries due to the large fraction of LAGBs present in BaSn0.92Sb0.08O3 ceramic sample.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia",
title = "Correlation between the microstructure and electrical properties of Sb-doped BaSnO3 ceramics",
pages = "36",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2085"
}

Mitrović, J., Počuča-Nešić, M., Malešević, A., Branković, Z., Vojisavljević, K., Savić, S., Ribić, V., Drev, S., Podlogar, M., Bernik, S., Rapljenović, Ž., Ivek, T.,& Branković, G.. (2023). Correlation between the microstructure and electrical properties of Sb-doped BaSnO3 ceramics. in 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia
University of Belgrade, Institute for Multidisciplinary Research., 36.
https://hdl.handle.net/21.15107/rcub_rimsi_2085

Mitrović J, Počuča-Nešić M, Malešević A, Branković Z, Vojisavljević K, Savić S, Ribić V, Drev S, Podlogar M, Bernik S, Rapljenović Ž, Ivek T, Branković G. Correlation between the microstructure and electrical properties of Sb-doped BaSnO3 ceramics. in 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia. 2023;:36.
https://hdl.handle.net/21.15107/rcub_rimsi_2085 .

Mitrović, Jelena, Počuča-Nešić, Milica, Malešević, Aleksandar, Branković, Zorica, Vojisavljević, Katarina, Savić, Slavica, Ribić, Vesna, Drev, Sandra, Podlogar, Matejka, Bernik, Slavko, Rapljenović, Željko, Ivek, Tomislav, Branković, Goran, "Correlation between the microstructure and electrical properties of Sb-doped BaSnO3 ceramics" in 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia (2023):36,
https://hdl.handle.net/21.15107/rcub_rimsi_2085 .

TY  - JOUR
AU  - Mitrović, Jelena
AU  - Rapljenović, Željko
AU  - Počuča-Nešić, Milica
AU  - Ivek, Tomislav
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2013
AB  - The influence of structural defects in spark plasma sintered BaSn1-xSbxO3 (BSSO, x=0.00 and 0.08)
ceramic samples on their electrical properties was investigated in the temperature range of 300–4K.
X-ray photoelectron spectroscopy (XPS) revealed the presence of point defects, primarily oxygen
vacancies (VO) and mixed oxidation states of tin (Sn2+/Sn4+) in both samples. As a result, the
undoped BSSO sample exibited a non-standard semiconductor behavior, retaining its temperaturedependent
resistivity. The electrical resistivity of the doped samples was two orders of magnitude
lower than that of the undoped sample. The presence of structural defects such asVO, mixed oxidation
states of the constituent elements, and significant amounts ofO− species make the electrical resistivity
of the doped sample constant in the temperature range of 300–70 K, indicating heavily-doped
semiconductor behavior.
PB  - IOP Publishing Ltd
T2  - Materials Research Express
T1  - The crucial role of defect structure in understanding the electrical properties of spark plasma sintered antimony doped barium stannate
SP  - 015901
VL  - 10
DO  - https://doi.org/10.1088/2053-1591/acb3b0
ER  - 

@article{
author = "Mitrović, Jelena and Rapljenović, Željko and Počuča-Nešić, Milica and Ivek, Tomislav and Branković, Zorica and Branković, Goran",
year = "2023",
abstract = "The influence of structural defects in spark plasma sintered BaSn1-xSbxO3 (BSSO, x=0.00 and 0.08)
ceramic samples on their electrical properties was investigated in the temperature range of 300–4K.
X-ray photoelectron spectroscopy (XPS) revealed the presence of point defects, primarily oxygen
vacancies (VO) and mixed oxidation states of tin (Sn2+/Sn4+) in both samples. As a result, the
undoped BSSO sample exibited a non-standard semiconductor behavior, retaining its temperaturedependent
resistivity. The electrical resistivity of the doped samples was two orders of magnitude
lower than that of the undoped sample. The presence of structural defects such asVO, mixed oxidation
states of the constituent elements, and significant amounts ofO− species make the electrical resistivity
of the doped sample constant in the temperature range of 300–70 K, indicating heavily-doped
semiconductor behavior.",
publisher = "IOP Publishing Ltd",
journal = "Materials Research Express",
title = "The crucial role of defect structure in understanding the electrical properties of spark plasma sintered antimony doped barium stannate",
pages = "015901",
volume = "10",
doi = "https://doi.org/10.1088/2053-1591/acb3b0"
}

Mitrović, J., Rapljenović, Ž., Počuča-Nešić, M., Ivek, T., Branković, Z.,& Branković, G.. (2023). The crucial role of defect structure in understanding the electrical properties of spark plasma sintered antimony doped barium stannate. in Materials Research Express
IOP Publishing Ltd., 10, 015901.
https://doi.org/https://doi.org/10.1088/2053-1591/acb3b0

Mitrović J, Rapljenović Ž, Počuča-Nešić M, Ivek T, Branković Z, Branković G. The crucial role of defect structure in understanding the electrical properties of spark plasma sintered antimony doped barium stannate. in Materials Research Express. 2023;10:015901.
doi:https://doi.org/10.1088/2053-1591/acb3b0 .

Mitrović, Jelena, Rapljenović, Željko, Počuča-Nešić, Milica, Ivek, Tomislav, Branković, Zorica, Branković, Goran, "The crucial role of defect structure in understanding the electrical properties of spark plasma sintered antimony doped barium stannate" in Materials Research Express, 10 (2023):015901,
https://doi.org/https://doi.org/10.1088/2053-1591/acb3b0 . .

TY  - JOUR
AU  - Vojisavljević, Katarina
AU  - Savić, Slavica M.
AU  - Počuča-Nešić, Milica
AU  - Hodžić, Aden
AU  - Kriechbaum, Manfred
AU  - Ribić, Vesna
AU  - Rečnik, Aleksander
AU  - Mitrović, Jelena
AU  - Branković, Goran
AU  - Djokic, Veljko
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1860
AB  - Developing highly efficient semiconductor metal oxide (SMOX) sensors capable of accurate and fast responses to environmental humidity is still a challenging task. In addition to a not so pronounced sensitivity to relative humidity change, most of the SMOXs cannot meet the criteria of real-time humidity sensing due to their long response/recovery time. The way to tackle this problem is to control adsorption/desorption processes, i.e., water-vapor molecular dynamics, over the sensor’s active layer through the powder and pore morphology design. With this in mind, a KIT-5-mediated synthesis was used to achieve mesoporous tin (IV) oxide replica (SnO2-R) with controlled pore size and ordering through template inversion and compared with a sol-gel synthesized powder (SnO2-SG). Unlike SnO2-SG, SnO2-R possessed a high specific surface area and quite an open pore structure, similar to the KIT-5, as observed by TEM, BET and SWAXS analyses. According to TEM, SnO2-R consisted of fine-grained globular particles and some percent of exaggerated, grown twinned crystals. The distinctive morphology of the SnO2-R-based sensor, with its specific pore structure and an increased number of oxygen-related defects associated with the powder preparation process and detected at the sensor surface by XPS analysis, contributed to excellent humidity sensing performances at room temperature, comprised of a low hysteresis error (3.7%), sensitivity of 406.8 kΩ/RH% and swift response/recovery speed (4 s/6 s).
PB  - MDPI
T2  - Molecules
T1  - KIT-5-Assisted Synthesis of Mesoporous SnO2 for High-Performance Humidity Sensors with a Swift Response/Recovery Speed
IS  - 4
SP  - 1754
VL  - 28
DO  - 10.3390/molecules28041754
ER  - 

@article{
author = "Vojisavljević, Katarina and Savić, Slavica M. and Počuča-Nešić, Milica and Hodžić, Aden and Kriechbaum, Manfred and Ribić, Vesna and Rečnik, Aleksander and Mitrović, Jelena and Branković, Goran and Djokic, Veljko",
year = "2023",
abstract = "Developing highly efficient semiconductor metal oxide (SMOX) sensors capable of accurate and fast responses to environmental humidity is still a challenging task. In addition to a not so pronounced sensitivity to relative humidity change, most of the SMOXs cannot meet the criteria of real-time humidity sensing due to their long response/recovery time. The way to tackle this problem is to control adsorption/desorption processes, i.e., water-vapor molecular dynamics, over the sensor’s active layer through the powder and pore morphology design. With this in mind, a KIT-5-mediated synthesis was used to achieve mesoporous tin (IV) oxide replica (SnO2-R) with controlled pore size and ordering through template inversion and compared with a sol-gel synthesized powder (SnO2-SG). Unlike SnO2-SG, SnO2-R possessed a high specific surface area and quite an open pore structure, similar to the KIT-5, as observed by TEM, BET and SWAXS analyses. According to TEM, SnO2-R consisted of fine-grained globular particles and some percent of exaggerated, grown twinned crystals. The distinctive morphology of the SnO2-R-based sensor, with its specific pore structure and an increased number of oxygen-related defects associated with the powder preparation process and detected at the sensor surface by XPS analysis, contributed to excellent humidity sensing performances at room temperature, comprised of a low hysteresis error (3.7%), sensitivity of 406.8 kΩ/RH% and swift response/recovery speed (4 s/6 s).",
publisher = "MDPI",
journal = "Molecules",
title = "KIT-5-Assisted Synthesis of Mesoporous SnO2 for High-Performance Humidity Sensors with a Swift Response/Recovery Speed",
number = "4",
pages = "1754",
volume = "28",
doi = "10.3390/molecules28041754"
}

Vojisavljević, K., Savić, S. M., Počuča-Nešić, M., Hodžić, A., Kriechbaum, M., Ribić, V., Rečnik, A., Mitrović, J., Branković, G.,& Djokic, V.. (2023). KIT-5-Assisted Synthesis of Mesoporous SnO2 for High-Performance Humidity Sensors with a Swift Response/Recovery Speed. in Molecules
MDPI., 28(4), 1754.
https://doi.org/10.3390/molecules28041754

Vojisavljević K, Savić SM, Počuča-Nešić M, Hodžić A, Kriechbaum M, Ribić V, Rečnik A, Mitrović J, Branković G, Djokic V. KIT-5-Assisted Synthesis of Mesoporous SnO2 for High-Performance Humidity Sensors with a Swift Response/Recovery Speed. in Molecules. 2023;28(4):1754.
doi:10.3390/molecules28041754 .

Vojisavljević, Katarina, Savić, Slavica M., Počuča-Nešić, Milica, Hodžić, Aden, Kriechbaum, Manfred, Ribić, Vesna, Rečnik, Aleksander, Mitrović, Jelena, Branković, Goran, Djokic, Veljko, "KIT-5-Assisted Synthesis of Mesoporous SnO2 for High-Performance Humidity Sensors with a Swift Response/Recovery Speed" in Molecules, 28, no. 4 (2023):1754,
https://doi.org/10.3390/molecules28041754 . .

TY  - CONF
AU  - Počuča-Nešić, Milica
AU  - Vukašinović, Jelena
AU  - Dapčević, Aleksandra
AU  - Ribić, Vesna
AU  - Branković, Zorica
AU  - Vojisavljević, Katarina
AU  - Marinković Stanojević, Zorica
AU  - Branković, Goran
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2031
AB  - Dyes released from textile industries present a big threat to the environment, and
remediation of wastewaters became one of the major scientific challenges. In recent
years, there has been a great need for catalysts that would oxidize pollutants under
dark ambient conditions without the use of external stimulants like light,
temperature, or additional chemicals such as O3, H2O2. Efficient work of these
catalysts would significantly reduce the energy consumption. Among other
materials, perovskite-type oxides with general formula ABO3 emerged as possible
catalysts for dye degradation in the dark conditions. Lanthanum nickelates with
single (LaNiO3) and layered perovskite structure (La4Ni3O10, La3Ni2O7, La2NiO4)
showed good catalytic properties, due to the existence of nickel in two oxidation
states (Ni2+ and Ni3+) and the oxygen non-stoichiometry in these materials [1].
This study presents structural, microstructural and catalytic properties of the
LaNi1-xNbxO3-based (xNb = 0.000, 0,005 and 0,010; La-Ni-Nb-O) powders prepared
by mechanical activation method. The XRD (X-Ray Diffraction) analysis revealed
the existence of a multiphase oxide system, including layered structures of
nickelates Lan+1NinO3n+1 (n = 3, 2, 1, 0) and NiO phase in all La-Ni-Nb-O-based
powders. Also, the HRTEM (High Resolution Transmission Electron Microscopy)
analysis confirmed the presence of structural polytypes in these powders. The
catalytic properties of La-Ni-Nb-O-based powders were investigated by degradation
of the anionic azo dye, Reactive Orange 16 (RO16), under dark ambient conditions
at different pH values (3, 6.5, 9.5 and 11) and temperature of 20 °C. The best
catalytic efficiency in the degradation of RO16 dye showed the sample with x(Nb) =
0.010 in acidic solution, where the residual of RO16 dye was about 4.5 % after 330
minutes. The reusability test for this powder in degradation process of RO16 dye
showed that the sample with x(Nb) = 0.010 retained its catalytic activity during three
cycles.
1. W. Zhong et al., Appl. Catal. A, Gen., 549 (2018) 302.
PB  - University of Belgrade, Institute for Multidisciplinary Research
C3  - 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
T1  - The catalytic degradation of RO16 dye under dark ambient conditions using La-Ni-Nb-O-based powders
SP  - 63
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2031
ER  - 

@conference{
author = "Počuča-Nešić, Milica and Vukašinović, Jelena and Dapčević, Aleksandra and Ribić, Vesna and Branković, Zorica and Vojisavljević, Katarina and Marinković Stanojević, Zorica and Branković, Goran",
year = "2022",
abstract = "Dyes released from textile industries present a big threat to the environment, and
remediation of wastewaters became one of the major scientific challenges. In recent
years, there has been a great need for catalysts that would oxidize pollutants under
dark ambient conditions without the use of external stimulants like light,
temperature, or additional chemicals such as O3, H2O2. Efficient work of these
catalysts would significantly reduce the energy consumption. Among other
materials, perovskite-type oxides with general formula ABO3 emerged as possible
catalysts for dye degradation in the dark conditions. Lanthanum nickelates with
single (LaNiO3) and layered perovskite structure (La4Ni3O10, La3Ni2O7, La2NiO4)
showed good catalytic properties, due to the existence of nickel in two oxidation
states (Ni2+ and Ni3+) and the oxygen non-stoichiometry in these materials [1].
This study presents structural, microstructural and catalytic properties of the
LaNi1-xNbxO3-based (xNb = 0.000, 0,005 and 0,010; La-Ni-Nb-O) powders prepared
by mechanical activation method. The XRD (X-Ray Diffraction) analysis revealed
the existence of a multiphase oxide system, including layered structures of
nickelates Lan+1NinO3n+1 (n = 3, 2, 1, 0) and NiO phase in all La-Ni-Nb-O-based
powders. Also, the HRTEM (High Resolution Transmission Electron Microscopy)
analysis confirmed the presence of structural polytypes in these powders. The
catalytic properties of La-Ni-Nb-O-based powders were investigated by degradation
of the anionic azo dye, Reactive Orange 16 (RO16), under dark ambient conditions
at different pH values (3, 6.5, 9.5 and 11) and temperature of 20 °C. The best
catalytic efficiency in the degradation of RO16 dye showed the sample with x(Nb) =
0.010 in acidic solution, where the residual of RO16 dye was about 4.5 % after 330
minutes. The reusability test for this powder in degradation process of RO16 dye
showed that the sample with x(Nb) = 0.010 retained its catalytic activity during three
cycles.
1. W. Zhong et al., Appl. Catal. A, Gen., 549 (2018) 302.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia",
title = "The catalytic degradation of RO16 dye under dark ambient conditions using La-Ni-Nb-O-based powders",
pages = "63",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2031"
}

Počuča-Nešić, M., Vukašinović, J., Dapčević, A., Ribić, V., Branković, Z., Vojisavljević, K., Marinković Stanojević, Z.,& Branković, G.. (2022). The catalytic degradation of RO16 dye under dark ambient conditions using La-Ni-Nb-O-based powders. in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
University of Belgrade, Institute for Multidisciplinary Research., 63.
https://hdl.handle.net/21.15107/rcub_rimsi_2031

Počuča-Nešić M, Vukašinović J, Dapčević A, Ribić V, Branković Z, Vojisavljević K, Marinković Stanojević Z, Branković G. The catalytic degradation of RO16 dye under dark ambient conditions using La-Ni-Nb-O-based powders. in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia. 2022;:63.
https://hdl.handle.net/21.15107/rcub_rimsi_2031 .

Počuča-Nešić, Milica, Vukašinović, Jelena, Dapčević, Aleksandra, Ribić, Vesna, Branković, Zorica, Vojisavljević, Katarina, Marinković Stanojević, Zorica, Branković, Goran, "The catalytic degradation of RO16 dye under dark ambient conditions using La-Ni-Nb-O-based powders" in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia (2022):63,
https://hdl.handle.net/21.15107/rcub_rimsi_2031 .

TY  - CONF
AU  - Vojisavljević, Katarina
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Savic, Slavica
AU  - Podlogar, Matejka
AU  - Zemljak, Olivera
AU  - Branković, Zorica
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2038
AB  - Hierarchical nanostructures with multiporous tin oxide nanofibers (SnO2-
MPNFs) and zinc oxide nanorods (ZnO-NRs) have been synthesized by combining
electrospinning technique and hydrothermal method. A solution containing
uniformly distributed tin (Sn) and silicon (Si) species of precursors, as well as a
sacrificial polymer (PVP) was electrospun using a single-nozzle spinneret to
fabricate nanofibers. In virtue of the Kirkendall effect driven by calcination at
550 °C, the SiO2-cored SnO2 nanofibers (SnO2-SiO2-NFs) deliberated from PVP
were formed and used as backbones for further hydrothermal growth of ZnO-NRs.
By varying the hydrothermal reaction time (0.5–2 h) at the constant concentration of
SnO2-SiO2-NFs, zinc (Zn) precursor, directing agent (hexamethylenetetramine,
HMT) and aqueous ammonia, the density, length and thickness of ZnO-NRs were
controlled. Nanofibers and ZnO-NRs/SnO2-MPNFs heterostructures are confirmed
by X-ray diffraction (XRD), field-emission scanning electron microcopy (FE-SEM),
energy dispersive spectrometer (EDS), transmission electron microscopy (TEM) and
elemental mapping analysis. 
The hydrothermal treatment conducted at 90 °C in aqueous ammonia allowed:
a) selective etching of SiO2 from the SnO2-SiO2-NFs core and SiO2 trapped between
SnO2 particles, and b) effective growth of ZnO-NRs. The process resulted in
ZnO-NRs/SnO2-MPNFs heterostructures with ZnO-NRs of 1–5 μm in length
attached to SnO2-MPNFs, the shell of which was composed of ultra-fine SnO2
crystallites (~5 nm in size) and where the four porous channels create the core
instead of SiO2. Photocatalytic performance of the heterostructures was investigated
toward different organic azo-dyes (methylene blue, methyl orange) and obvious
enhancement was demonstrated in degradation of the organic pollutant, compared to
primary SnO2-based nanofibers.
PB  - University of Belgrade, Institute for Multidisciplinary Research
C3  - 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
T1  - Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances
SP  - 51
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2038
ER  - 

@conference{
author = "Vojisavljević, Katarina and Vukašinović, Jelena and Počuča-Nešić, Milica and Savic, Slavica and Podlogar, Matejka and Zemljak, Olivera and Branković, Zorica",
year = "2022",
abstract = "Hierarchical nanostructures with multiporous tin oxide nanofibers (SnO2-
MPNFs) and zinc oxide nanorods (ZnO-NRs) have been synthesized by combining
electrospinning technique and hydrothermal method. A solution containing
uniformly distributed tin (Sn) and silicon (Si) species of precursors, as well as a
sacrificial polymer (PVP) was electrospun using a single-nozzle spinneret to
fabricate nanofibers. In virtue of the Kirkendall effect driven by calcination at
550 °C, the SiO2-cored SnO2 nanofibers (SnO2-SiO2-NFs) deliberated from PVP
were formed and used as backbones for further hydrothermal growth of ZnO-NRs.
By varying the hydrothermal reaction time (0.5–2 h) at the constant concentration of
SnO2-SiO2-NFs, zinc (Zn) precursor, directing agent (hexamethylenetetramine,
HMT) and aqueous ammonia, the density, length and thickness of ZnO-NRs were
controlled. Nanofibers and ZnO-NRs/SnO2-MPNFs heterostructures are confirmed
by X-ray diffraction (XRD), field-emission scanning electron microcopy (FE-SEM),
energy dispersive spectrometer (EDS), transmission electron microscopy (TEM) and
elemental mapping analysis. 
The hydrothermal treatment conducted at 90 °C in aqueous ammonia allowed:
a) selective etching of SiO2 from the SnO2-SiO2-NFs core and SiO2 trapped between
SnO2 particles, and b) effective growth of ZnO-NRs. The process resulted in
ZnO-NRs/SnO2-MPNFs heterostructures with ZnO-NRs of 1–5 μm in length
attached to SnO2-MPNFs, the shell of which was composed of ultra-fine SnO2
crystallites (~5 nm in size) and where the four porous channels create the core
instead of SiO2. Photocatalytic performance of the heterostructures was investigated
toward different organic azo-dyes (methylene blue, methyl orange) and obvious
enhancement was demonstrated in degradation of the organic pollutant, compared to
primary SnO2-based nanofibers.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia",
title = "Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances",
pages = "51",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2038"
}

Vojisavljević, K., Vukašinović, J., Počuča-Nešić, M., Savic, S., Podlogar, M., Zemljak, O.,& Branković, Z.. (2022). Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances. in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
University of Belgrade, Institute for Multidisciplinary Research., 51.
https://hdl.handle.net/21.15107/rcub_rimsi_2038

Vojisavljević K, Vukašinović J, Počuča-Nešić M, Savic S, Podlogar M, Zemljak O, Branković Z. Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances. in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia. 2022;:51.
https://hdl.handle.net/21.15107/rcub_rimsi_2038 .

Vojisavljević, Katarina, Vukašinović, Jelena, Počuča-Nešić, Milica, Savic, Slavica, Podlogar, Matejka, Zemljak, Olivera, Branković, Zorica, "Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances" in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia (2022):51,
https://hdl.handle.net/21.15107/rcub_rimsi_2038 .

TY  - CONF
AU  - Vukašinović, Jelena
AU  - Rapljenović, Željko
AU  - Počuča-Nešić, Milica
AU  - Ivek, Tomislav
AU  - Peter, Robert
AU  - Branković, Zorica
AU  - Zemljak, Olivera
AU  - Branković, Goran
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2025
AB  - Barium stannate, BaSnO3 (BSO), is a perovskite-type alkaline earth metal
stannate with almost ideal cubic structure. Appropriate doping can alter this wide
band gap material’s electrical characteristics and change it either into a proton
conductor or n-type semiconductor. In the case of Sb doping on Sn site, BSO
becomes n-type semiconductor with high electrical conductivity at 25 °C.
The major drawback of BSO-based ceramics is its low density. The
conventional solid state procedure requires long thermal treatments with several
intermittent grinding and heating steps at temperatures up to 1600 °C [1].
To overcome this problem, we used Spark Plasma Sintering technique (SPS) for
the preparation of BaSn1-xSbxO3, (x = 0.00 (BSSO0) and 0.08 (BSSO8)) ceramic
samples. The samples structural properties were investigated using XRD (X-Ray
Powder Diffraction), XPS (X-Ray Photoelectron Spectrophotmetry) and SIMS
(Secondary Ion Mass Spectrometry) analyses. XPS analysis revealed the existence
of many structural defects, including mixed oxidation states of tin (Sn2+/Sn4+) and
oxygen vacancies (VO) in both BSSO samples.
The electrical properties of the BSSO ceramic samples were investigated in the
temperature range of 4–300 K. The presence of oxygen vacancies in the BSSO0
sample led to the absence of the standard activated semiconductor behavior,
showing almost linear temperature-dependent resistivity in the examined
temperature range. On the other hand, the BSSO8 sample showed almost temperature-independent resistivity in the range of 70–300 K. This could be a
consequence of the presence of many structural defects such as mixed oxidation
states of Sn2+/Sn4+, probably Sb3+/Sb5+ and significant amount of O- species, as well
as the presence of the low angle grain boundaries found in this sample. The BSSO8
ceramic sample could satisfy the huge demand for the linear resistors with moderate
and high conductivity, due to its low and almost constant electrical resistivity in the
wide temperature.
1. A.-M. Azad, L.L.W. Shyan, T.Y. Pang, C.H. Nee, Ceram. Int., 26 (2000) 685.
PB  - University of Belgrade, Institute for Multidisciplinary Research
C3  - 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
T1  - The defect structure and electrical properties of the spark plasma sintered antimony-doped barium stannate
EP  - 76
SP  - 75
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2025
ER  - 

@conference{
author = "Vukašinović, Jelena and Rapljenović, Željko and Počuča-Nešić, Milica and Ivek, Tomislav and Peter, Robert and Branković, Zorica and Zemljak, Olivera and Branković, Goran",
year = "2022",
abstract = "Barium stannate, BaSnO3 (BSO), is a perovskite-type alkaline earth metal
stannate with almost ideal cubic structure. Appropriate doping can alter this wide
band gap material’s electrical characteristics and change it either into a proton
conductor or n-type semiconductor. In the case of Sb doping on Sn site, BSO
becomes n-type semiconductor with high electrical conductivity at 25 °C.
The major drawback of BSO-based ceramics is its low density. The
conventional solid state procedure requires long thermal treatments with several
intermittent grinding and heating steps at temperatures up to 1600 °C [1].
To overcome this problem, we used Spark Plasma Sintering technique (SPS) for
the preparation of BaSn1-xSbxO3, (x = 0.00 (BSSO0) and 0.08 (BSSO8)) ceramic
samples. The samples structural properties were investigated using XRD (X-Ray
Powder Diffraction), XPS (X-Ray Photoelectron Spectrophotmetry) and SIMS
(Secondary Ion Mass Spectrometry) analyses. XPS analysis revealed the existence
of many structural defects, including mixed oxidation states of tin (Sn2+/Sn4+) and
oxygen vacancies (VO) in both BSSO samples.
The electrical properties of the BSSO ceramic samples were investigated in the
temperature range of 4–300 K. The presence of oxygen vacancies in the BSSO0
sample led to the absence of the standard activated semiconductor behavior,
showing almost linear temperature-dependent resistivity in the examined
temperature range. On the other hand, the BSSO8 sample showed almost temperature-independent resistivity in the range of 70–300 K. This could be a
consequence of the presence of many structural defects such as mixed oxidation
states of Sn2+/Sn4+, probably Sb3+/Sb5+ and significant amount of O- species, as well
as the presence of the low angle grain boundaries found in this sample. The BSSO8
ceramic sample could satisfy the huge demand for the linear resistors with moderate
and high conductivity, due to its low and almost constant electrical resistivity in the
wide temperature.
1. A.-M. Azad, L.L.W. Shyan, T.Y. Pang, C.H. Nee, Ceram. Int., 26 (2000) 685.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia",
title = "The defect structure and electrical properties of the spark plasma sintered antimony-doped barium stannate",
pages = "76-75",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2025"
}

Vukašinović, J., Rapljenović, Ž., Počuča-Nešić, M., Ivek, T., Peter, R., Branković, Z., Zemljak, O.,& Branković, G.. (2022). The defect structure and electrical properties of the spark plasma sintered antimony-doped barium stannate. in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
University of Belgrade, Institute for Multidisciplinary Research., 75-76.
https://hdl.handle.net/21.15107/rcub_rimsi_2025

Vukašinović J, Rapljenović Ž, Počuča-Nešić M, Ivek T, Peter R, Branković Z, Zemljak O, Branković G. The defect structure and electrical properties of the spark plasma sintered antimony-doped barium stannate. in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia. 2022;:75-76.
https://hdl.handle.net/21.15107/rcub_rimsi_2025 .

Vukašinović, Jelena, Rapljenović, Željko, Počuča-Nešić, Milica, Ivek, Tomislav, Peter, Robert, Branković, Zorica, Zemljak, Olivera, Branković, Goran, "The defect structure and electrical properties of the spark plasma sintered antimony-doped barium stannate" in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia (2022):75-76,
https://hdl.handle.net/21.15107/rcub_rimsi_2025 .

TY  - CONF
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Malešević, Aleksandar
AU  - Ribić, Vesna
AU  - Drev, Sandra
AU  - Rečnik, Aleksander
AU  - Bernik, Slavko
AU  - Podlogar, Matejka
AU  - Branković, Goran
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2026
AB  - Barium stannate, BaSnO3 (BSO), a cubic perovskite-type oxide with its
interesting structural, optical and electrical properties has wide application as an
electrode material, thermally stable capacitor, transparent conductive oxide,
photocatalyst, humidity and gas sensor material [1]. Partial substitution of Sn by Sb
in BSO leads to drastic changes primarily in its electrical properties, resulting in
metallic-like conductivity of doped ceramics. Major problems concerning the
synthesis of Sb doped BSO (BSSO) are connected to the phase composition and
density of final ceramic material.
This study covers the comprehensive investigation of structural, microstructural
and electrical properties of the Sb-doped BaSn1-xSbxO3 (x = 0.00, 0.04 and 0.08,
BSSO) ceramic materials obtained by two different sintering techniques:
conventional sintering (CS) and Spark Plasma sintering (SPS). The relative densities
of the BSSO-CS ceramic samples sintered at 1600 °C for 3 h was in the range of 79–
96 %. On the other side, the relative densities of BSSO-SPS ceramic samples in the
range of 86–96 % were obtained at 1200 °C, with sintering time of only 5 minutes.
The XRD analysis confirmed that cubic BaSnO3 is a major phase in all BSSO
samples. The presence of tetragonal Ba2SnO4 as a secondary phase was detected in
BSSO-SPS ceramic samples, with its content decreasing upon Sb-doping. As
expected, the grain size of the samples sintered at higher temperatures (BSSO-CS) is
larger in comparison with BSSO-SPS ceramic samples, which was confirmed by
Scanning Electron Microscopy (SEM). SEM analysis also revealed the layered
structure within the grains of BaSn0.92Sb0.08O3-CS sample while HRTEM analysis
confirmed the existence of the low angle grain boundaries (LAGBs) in the SPSed
sample with the same composition.
The electrical resistivity decreased upon Sb doping, and all doped BSSO
samples showed the linear I-U characteristic in the temperature range of 25–150 °C.
The semiconductor behavior of all BSSO-CS and BSSO-SPS (x = 0.00 and 0.04)
ceramic samples was confirmed through the existence of semicircles in their
impedance spectra. On the other hand, the BaSn0.92Sb0.08O3 sample showed the
metallic-like behavior resulting from the loss of the electrostatic barriers at LAGBs,
which is manifested through the absence of the semicircle in its impedance spectra.
PB  - University of Belgrade, Institute for Multidisciplinary Research
C3  - 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
T1  - Effect of the sintering technique on the properties of Sb-doped BaSnO3 ceramics
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2026
ER  - 

@conference{
author = "Vukašinović, Jelena and Počuča-Nešić, Milica and Malešević, Aleksandar and Ribić, Vesna and Drev, Sandra and Rečnik, Aleksander and Bernik, Slavko and Podlogar, Matejka and Branković, Goran",
year = "2022",
abstract = "Barium stannate, BaSnO3 (BSO), a cubic perovskite-type oxide with its
interesting structural, optical and electrical properties has wide application as an
electrode material, thermally stable capacitor, transparent conductive oxide,
photocatalyst, humidity and gas sensor material [1]. Partial substitution of Sn by Sb
in BSO leads to drastic changes primarily in its electrical properties, resulting in
metallic-like conductivity of doped ceramics. Major problems concerning the
synthesis of Sb doped BSO (BSSO) are connected to the phase composition and
density of final ceramic material.
This study covers the comprehensive investigation of structural, microstructural
and electrical properties of the Sb-doped BaSn1-xSbxO3 (x = 0.00, 0.04 and 0.08,
BSSO) ceramic materials obtained by two different sintering techniques:
conventional sintering (CS) and Spark Plasma sintering (SPS). The relative densities
of the BSSO-CS ceramic samples sintered at 1600 °C for 3 h was in the range of 79–
96 %. On the other side, the relative densities of BSSO-SPS ceramic samples in the
range of 86–96 % were obtained at 1200 °C, with sintering time of only 5 minutes.
The XRD analysis confirmed that cubic BaSnO3 is a major phase in all BSSO
samples. The presence of tetragonal Ba2SnO4 as a secondary phase was detected in
BSSO-SPS ceramic samples, with its content decreasing upon Sb-doping. As
expected, the grain size of the samples sintered at higher temperatures (BSSO-CS) is
larger in comparison with BSSO-SPS ceramic samples, which was confirmed by
Scanning Electron Microscopy (SEM). SEM analysis also revealed the layered
structure within the grains of BaSn0.92Sb0.08O3-CS sample while HRTEM analysis
confirmed the existence of the low angle grain boundaries (LAGBs) in the SPSed
sample with the same composition.
The electrical resistivity decreased upon Sb doping, and all doped BSSO
samples showed the linear I-U characteristic in the temperature range of 25–150 °C.
The semiconductor behavior of all BSSO-CS and BSSO-SPS (x = 0.00 and 0.04)
ceramic samples was confirmed through the existence of semicircles in their
impedance spectra. On the other hand, the BaSn0.92Sb0.08O3 sample showed the
metallic-like behavior resulting from the loss of the electrostatic barriers at LAGBs,
which is manifested through the absence of the semicircle in its impedance spectra.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia",
title = "Effect of the sintering technique on the properties of Sb-doped BaSnO3 ceramics",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2026"
}

Vukašinović, J., Počuča-Nešić, M., Malešević, A., Ribić, V., Drev, S., Rečnik, A., Bernik, S., Podlogar, M.,& Branković, G.. (2022). Effect of the sintering technique on the properties of Sb-doped BaSnO3 ceramics. in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
University of Belgrade, Institute for Multidisciplinary Research..
https://hdl.handle.net/21.15107/rcub_rimsi_2026

Vukašinović J, Počuča-Nešić M, Malešević A, Ribić V, Drev S, Rečnik A, Bernik S, Podlogar M, Branković G. Effect of the sintering technique on the properties of Sb-doped BaSnO3 ceramics. in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia. 2022;.
https://hdl.handle.net/21.15107/rcub_rimsi_2026 .

Vukašinović, Jelena, Počuča-Nešić, Milica, Malešević, Aleksandar, Ribić, Vesna, Drev, Sandra, Rečnik, Aleksander, Bernik, Slavko, Podlogar, Matejka, Branković, Goran, "Effect of the sintering technique on the properties of Sb-doped BaSnO3 ceramics" in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia (2022),
https://hdl.handle.net/21.15107/rcub_rimsi_2026 .

TY  - CONF
AU  - Zemljak, Olivera
AU  - Luković Golić, Danijela
AU  - Počuča-Nešić, Milica
AU  - Dapčević, Aleksandra
AU  - Pajić, Damir
AU  - Šenjug, Pavla
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2211
AB  - Hexagonal (P63cm) yttrium manganite, YMnO3, is a multiferroic material with
ferroelectric transition at TC ≈ 900 K and antiferromagnetic transition at TN ≈ 70 K. Multiferroic behavior attracts a lot of attention because of its potential for
various applications. The application possibilities are limited by large
microcracking and microporosity of YMnO3 ceramics.
In this work, the influence of Ti-doping on structural, ferroelectric and magnetic
properties of YMnO3 ceramics was investigated. YMn1–xTixO3+δ (x = 0, 0.04, 0.08,
0.10, 0.15, 0.20) powders were prepared using sol-gel, polymerization complex
method from citrate precursors, which were then calcinated at 900 °C for 4 h. The
ceramic samples were obtained after sintering for 2 h at: 1400 °C for YMnO3,
YMn0.96Ti0.04O3+δ, YMn0.92Ti0.08O3+δ and YMn0.90Ti0.10O3+δ; 1450 C for
YMn0.85Ti0.15O3+δ; 1470 °C for YMn0.80Ti0.20O3+δ. X-ray diffraction (XRD),
transmission and scanning electron microscopy (TEM and SEM) were used for
structural and microstructural analysis of samples. Ferroelectric measurements of
P(E) loops and leakage currents, and magnetic measurements of zero field cooled
(ZFC) and field cooled (FC) M(T) curves, as well as M(H) curves, were enabled
multiferroic characterization of ceramic samples.
The samples x = 0 and 0.04 are crystallized in a single phased hexagonal
structure, (P63cm), the samples x = 0.08 and 0.10 exhibited the presence of both
hexagonal phase and rhombohedral phase (R3c), and the samples x = 0.15 and 0.20
are crystallized in rhombohedral 1×1×3 superstructure. Ti-doped YMnO3 ceramic
samples showed reduced density of microcracks, and inter- and intragranular pores,
and large increase in relative density (greater than 90 %) for YMn1–xTixO3+δ (x =
0.10, 0.15 and 0.20) samples. Leakage currents for most of doped samples were
lower than leakage current of undoped sample, but the ferroelectric response was not
significantly improved. Doping of YMnO3 with nonmagnetic Ti4+ led to suppression
of antiferromagnetic ordering visible through decrease of the Néel temperature and
Weiss parameter and the appearance of weak ferromagnetism.
PB  - Institut za multicisciplinarna istrživanja, Belgrade, Serbia
C3  - 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022 Belgrade, Serbia 6CSCS-2022
T1  - The influence of Ti-doping on structural and multiferroic properties of yttrium manganite ceramics
SP  - 74
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2211
ER  - 

@conference{
author = "Zemljak, Olivera and Luković Golić, Danijela and Počuča-Nešić, Milica and Dapčević, Aleksandra and Pajić, Damir and Šenjug, Pavla and Branković, Goran and Branković, Zorica",
year = "2022",
abstract = "Hexagonal (P63cm) yttrium manganite, YMnO3, is a multiferroic material with
ferroelectric transition at TC ≈ 900 K and antiferromagnetic transition at TN ≈ 70 K. Multiferroic behavior attracts a lot of attention because of its potential for
various applications. The application possibilities are limited by large
microcracking and microporosity of YMnO3 ceramics.
In this work, the influence of Ti-doping on structural, ferroelectric and magnetic
properties of YMnO3 ceramics was investigated. YMn1–xTixO3+δ (x = 0, 0.04, 0.08,
0.10, 0.15, 0.20) powders were prepared using sol-gel, polymerization complex
method from citrate precursors, which were then calcinated at 900 °C for 4 h. The
ceramic samples were obtained after sintering for 2 h at: 1400 °C for YMnO3,
YMn0.96Ti0.04O3+δ, YMn0.92Ti0.08O3+δ and YMn0.90Ti0.10O3+δ; 1450 C for
YMn0.85Ti0.15O3+δ; 1470 °C for YMn0.80Ti0.20O3+δ. X-ray diffraction (XRD),
transmission and scanning electron microscopy (TEM and SEM) were used for
structural and microstructural analysis of samples. Ferroelectric measurements of
P(E) loops and leakage currents, and magnetic measurements of zero field cooled
(ZFC) and field cooled (FC) M(T) curves, as well as M(H) curves, were enabled
multiferroic characterization of ceramic samples.
The samples x = 0 and 0.04 are crystallized in a single phased hexagonal
structure, (P63cm), the samples x = 0.08 and 0.10 exhibited the presence of both
hexagonal phase and rhombohedral phase (R3c), and the samples x = 0.15 and 0.20
are crystallized in rhombohedral 1×1×3 superstructure. Ti-doped YMnO3 ceramic
samples showed reduced density of microcracks, and inter- and intragranular pores,
and large increase in relative density (greater than 90 %) for YMn1–xTixO3+δ (x =
0.10, 0.15 and 0.20) samples. Leakage currents for most of doped samples were
lower than leakage current of undoped sample, but the ferroelectric response was not
significantly improved. Doping of YMnO3 with nonmagnetic Ti4+ led to suppression
of antiferromagnetic ordering visible through decrease of the Néel temperature and
Weiss parameter and the appearance of weak ferromagnetism.",
publisher = "Institut za multicisciplinarna istrživanja, Belgrade, Serbia",
journal = "6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022 Belgrade, Serbia 6CSCS-2022",
title = "The influence of Ti-doping on structural and multiferroic properties of yttrium manganite ceramics",
pages = "74",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2211"
}

Zemljak, O., Luković Golić, D., Počuča-Nešić, M., Dapčević, A., Pajić, D., Šenjug, P., Branković, G.,& Branković, Z.. (2022). The influence of Ti-doping on structural and multiferroic properties of yttrium manganite ceramics. in 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022 Belgrade, Serbia 6CSCS-2022
Institut za multicisciplinarna istrživanja, Belgrade, Serbia., 74.
https://hdl.handle.net/21.15107/rcub_rimsi_2211

Zemljak O, Luković Golić D, Počuča-Nešić M, Dapčević A, Pajić D, Šenjug P, Branković G, Branković Z. The influence of Ti-doping on structural and multiferroic properties of yttrium manganite ceramics. in 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022 Belgrade, Serbia 6CSCS-2022. 2022;:74.
https://hdl.handle.net/21.15107/rcub_rimsi_2211 .

Zemljak, Olivera, Luković Golić, Danijela, Počuča-Nešić, Milica, Dapčević, Aleksandra, Pajić, Damir, Šenjug, Pavla, Branković, Goran, Branković, Zorica, "The influence of Ti-doping on structural and multiferroic properties of yttrium manganite ceramics" in 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022 Belgrade, Serbia 6CSCS-2022 (2022):74,
https://hdl.handle.net/21.15107/rcub_rimsi_2211 .

TY  - JOUR
AU  - Milošević, Olivera
AU  - Luković Golić, Danijela
AU  - Počuča-Nešić, Milica
AU  - Dapčević, Aleksandra
AU  - Šenjug, Pavla
AU  - Pajić, Damir
AU  - Radošević, Tina
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1750
AB  - Yttrium manganite, YMnO3, was doped with different concentrations of titanium (x = 0, 0.04, 0.08, 0.10, 0.15, 0.20) in order to improve the microstructural and multiferroic properties. The powders were prepared using sol-gel polymerization complex method from citrate precursors. Depending on the titanium concentration, the hexagonal structure and/or the rhombohedral superstructure are present in the sintered samples. The YMn1–xTixO3+δ (x = 0.10, 0.15, 0.20) ceramic samples showed significantly reduced density of microcracks, and of inter- and intragranular pores, and relative densities greater than 90 %. The structural parameters for YMn1–xTixO3+δ (x = 0, 0.10, 0.15) were correlated with the results of magnetic and ferroelectric measurements. The most of titanium-doped samples showed a reduction of the leakage current density in comparison with undoped YMnO3, and their ferroelectric responses were slightly improved. The modifications in structural arrangement resulted in partial suppression of ideal antiferromagnetic ordering visible through decrease of the Néel temperature and Weiss parameter, as well as the appearance of weak ferromagnetism and increase of magnetization (especially, in samples x = 0.08, 0.10, 0.15). These changes in physical quantities most likely originated from incorporation of the uncompensated magnetic moments and possible spin canting induced by enhanced symmetry break of the superexchange bridges.
PB  - Springer
T2  - Journal of Sol-Gel Science and Technology
T1  - Titanium doped yttrium manganite: improvement of microstructural properties and peculiarities of multiferroic properties
EP  - 819
IS  - 3
SP  - 807
VL  - 103
DO  - 10.1007/s10971-022-05872-3
ER  - 

@article{
author = "Milošević, Olivera and Luković Golić, Danijela and Počuča-Nešić, Milica and Dapčević, Aleksandra and Šenjug, Pavla and Pajić, Damir and Radošević, Tina and Branković, Goran and Branković, Zorica",
year = "2022",
abstract = "Yttrium manganite, YMnO3, was doped with different concentrations of titanium (x = 0, 0.04, 0.08, 0.10, 0.15, 0.20) in order to improve the microstructural and multiferroic properties. The powders were prepared using sol-gel polymerization complex method from citrate precursors. Depending on the titanium concentration, the hexagonal structure and/or the rhombohedral superstructure are present in the sintered samples. The YMn1–xTixO3+δ (x = 0.10, 0.15, 0.20) ceramic samples showed significantly reduced density of microcracks, and of inter- and intragranular pores, and relative densities greater than 90 %. The structural parameters for YMn1–xTixO3+δ (x = 0, 0.10, 0.15) were correlated with the results of magnetic and ferroelectric measurements. The most of titanium-doped samples showed a reduction of the leakage current density in comparison with undoped YMnO3, and their ferroelectric responses were slightly improved. The modifications in structural arrangement resulted in partial suppression of ideal antiferromagnetic ordering visible through decrease of the Néel temperature and Weiss parameter, as well as the appearance of weak ferromagnetism and increase of magnetization (especially, in samples x = 0.08, 0.10, 0.15). These changes in physical quantities most likely originated from incorporation of the uncompensated magnetic moments and possible spin canting induced by enhanced symmetry break of the superexchange bridges.",
publisher = "Springer",
journal = "Journal of Sol-Gel Science and Technology",
title = "Titanium doped yttrium manganite: improvement of microstructural properties and peculiarities of multiferroic properties",
pages = "819-807",
number = "3",
volume = "103",
doi = "10.1007/s10971-022-05872-3"
}

Milošević, O., Luković Golić, D., Počuča-Nešić, M., Dapčević, A., Šenjug, P., Pajić, D., Radošević, T., Branković, G.,& Branković, Z.. (2022). Titanium doped yttrium manganite: improvement of microstructural properties and peculiarities of multiferroic properties. in Journal of Sol-Gel Science and Technology
Springer., 103(3), 807-819.
https://doi.org/10.1007/s10971-022-05872-3

Milošević O, Luković Golić D, Počuča-Nešić M, Dapčević A, Šenjug P, Pajić D, Radošević T, Branković G, Branković Z. Titanium doped yttrium manganite: improvement of microstructural properties and peculiarities of multiferroic properties. in Journal of Sol-Gel Science and Technology. 2022;103(3):807-819.
doi:10.1007/s10971-022-05872-3 .

Milošević, Olivera, Luković Golić, Danijela, Počuča-Nešić, Milica, Dapčević, Aleksandra, Šenjug, Pavla, Pajić, Damir, Radošević, Tina, Branković, Goran, Branković, Zorica, "Titanium doped yttrium manganite: improvement of microstructural properties and peculiarities of multiferroic properties" in Journal of Sol-Gel Science and Technology, 103, no. 3 (2022):807-819,
https://doi.org/10.1007/s10971-022-05872-3 . .

TY  - GEN
AU  - Počuča-Nešić, Milica
AU  - Vukašinović, Jelena
AU  - Branković, Goran
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2078
AB  - Multiferroic materials simultaneously host at least two primary ferroic orders (ferroelectricity, ferromagnetism, or ferroelasticity) in the same phase [1]. The possibility to control ferroelectric properties via magnetic field, or the control of magnetic properties by applied electric field, makes these systems particularly interesting for high-tech application. Multiferroics can be used to manufacture multifunctional microelectronic or microwave devices, ferroelectric memory components, magnetic data storage, etc.
YMnO3 is a multiferroic compound which appears in two crystal modifications, the hexagonal thermically stable form and the rhombic metastabile crystal structure. The goal of our research is to obtain multiferroic YMnO3 which would simultaneously show ferroelectric and antiferromagnetic properties. With this in mind, we compared two methods of synthesis: mechanochemical as well as chemical synthesis from citrate polymer precursors. Our results show that chemical synthesis yields powders which, apart from h-YMnO3 and o-YmnO3, also contain YMn2O5 as a secondary phase. However, conventional sintering of these powders at 1400 °C during 2 h produces h-ordered YMnO3 which is simultaneously ferroelectric as well as antiferromagnetically.
T2  - Advanced electronic materials in fundamental research and applications, workshop, 9th December, 2021, Zagreb, Croatia
T1  - Mechanochemical and chemical synthesis of multiferroic yttrium manganite
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2078
ER  - 

@misc{
author = "Počuča-Nešić, Milica and Vukašinović, Jelena and Branković, Goran",
year = "2021",
abstract = "Multiferroic materials simultaneously host at least two primary ferroic orders (ferroelectricity, ferromagnetism, or ferroelasticity) in the same phase [1]. The possibility to control ferroelectric properties via magnetic field, or the control of magnetic properties by applied electric field, makes these systems particularly interesting for high-tech application. Multiferroics can be used to manufacture multifunctional microelectronic or microwave devices, ferroelectric memory components, magnetic data storage, etc.
YMnO3 is a multiferroic compound which appears in two crystal modifications, the hexagonal thermically stable form and the rhombic metastabile crystal structure. The goal of our research is to obtain multiferroic YMnO3 which would simultaneously show ferroelectric and antiferromagnetic properties. With this in mind, we compared two methods of synthesis: mechanochemical as well as chemical synthesis from citrate polymer precursors. Our results show that chemical synthesis yields powders which, apart from h-YMnO3 and o-YmnO3, also contain YMn2O5 as a secondary phase. However, conventional sintering of these powders at 1400 °C during 2 h produces h-ordered YMnO3 which is simultaneously ferroelectric as well as antiferromagnetically.",
journal = "Advanced electronic materials in fundamental research and applications, workshop, 9th December, 2021, Zagreb, Croatia",
title = "Mechanochemical and chemical synthesis of multiferroic yttrium manganite",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2078"
}

Počuča-Nešić, M., Vukašinović, J.,& Branković, G.. (2021). Mechanochemical and chemical synthesis of multiferroic yttrium manganite. in Advanced electronic materials in fundamental research and applications, workshop, 9th December, 2021, Zagreb, Croatia.
https://hdl.handle.net/21.15107/rcub_rimsi_2078

Počuča-Nešić M, Vukašinović J, Branković G. Mechanochemical and chemical synthesis of multiferroic yttrium manganite. in Advanced electronic materials in fundamental research and applications, workshop, 9th December, 2021, Zagreb, Croatia. 2021;.
https://hdl.handle.net/21.15107/rcub_rimsi_2078 .

Počuča-Nešić, Milica, Vukašinović, Jelena, Branković, Goran, "Mechanochemical and chemical synthesis of multiferroic yttrium manganite" in Advanced electronic materials in fundamental research and applications, workshop, 9th December, 2021, Zagreb, Croatia (2021),
https://hdl.handle.net/21.15107/rcub_rimsi_2078 .

TY  - JOUR
AU  - Dapčević, Aleksandra
AU  - Radojković, Aleksandar
AU  - Žunić, Milan
AU  - Počuča-Nešić, Milica
AU  - Milošević, Olivera
AU  - Branković, Goran
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1492
AB  - In this study, the possibility to stabilize O-2 ion conductors in Bi2O3-V2O5 system was investigated. Six pseudo-binary Bi2O3-V2O5 mixtures [3.50  lt  x(V2O5)  lt  8.50 mol%] were thermally treated at 1000 degrees C for 1 h. The samples were characterized by XRD, HRTEM/SAED, DTA and EIS techniques. The high-temperature reaction between alpha Bi2O3 and V2O5 resulted in formation of microcrystalline single-phase specimens containing the phase based on delta-Bi2O3 if V2O5 content was >= 4.63 mol%. The obtained phases exhibited main diffraction peaks corresponding to the simple cubic delta-Bi2O3 (space group Fm-3m) but Rietveld refinement showed a threefold repeat on a simple cubic sublattice indicating that the true unit cell is 3x3x3 supercell. Within proposed supercell, the octahedrally coordinated V5+ ions fully occupy 4a Wyckoff position and partially occupy 32f. The Bi3+ ions are placed at the rest of 32f and at 24e and 48h with full occupation. In total, 22 % of anionic sites are vacant. The ionic conductivity of phase with the lowest dopant content, i.e. Bi103V5O167, amounts 0.283 S cm(-1) at 800 degrees C with the activation energy of 0.64(5) eV, which is comparable to the undoped delta-Bi2O3 known as the fastest ion conductor.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Fast Oxide-Ion Conductors in Bi2O3-V2O5 System: Bi108-xVxO162+x(x=4-9) with 3 x 3 x 3 Superstructure
EP  - 66
IS  - 1
SP  - 55
VL  - 53
DO  - 10.2298/SOS2101055D
ER  - 

@article{
author = "Dapčević, Aleksandra and Radojković, Aleksandar and Žunić, Milan and Počuča-Nešić, Milica and Milošević, Olivera and Branković, Goran",
year = "2021",
abstract = "In this study, the possibility to stabilize O-2 ion conductors in Bi2O3-V2O5 system was investigated. Six pseudo-binary Bi2O3-V2O5 mixtures [3.50  lt  x(V2O5)  lt  8.50 mol%] were thermally treated at 1000 degrees C for 1 h. The samples were characterized by XRD, HRTEM/SAED, DTA and EIS techniques. The high-temperature reaction between alpha Bi2O3 and V2O5 resulted in formation of microcrystalline single-phase specimens containing the phase based on delta-Bi2O3 if V2O5 content was >= 4.63 mol%. The obtained phases exhibited main diffraction peaks corresponding to the simple cubic delta-Bi2O3 (space group Fm-3m) but Rietveld refinement showed a threefold repeat on a simple cubic sublattice indicating that the true unit cell is 3x3x3 supercell. Within proposed supercell, the octahedrally coordinated V5+ ions fully occupy 4a Wyckoff position and partially occupy 32f. The Bi3+ ions are placed at the rest of 32f and at 24e and 48h with full occupation. In total, 22 % of anionic sites are vacant. The ionic conductivity of phase with the lowest dopant content, i.e. Bi103V5O167, amounts 0.283 S cm(-1) at 800 degrees C with the activation energy of 0.64(5) eV, which is comparable to the undoped delta-Bi2O3 known as the fastest ion conductor.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Fast Oxide-Ion Conductors in Bi2O3-V2O5 System: Bi108-xVxO162+x(x=4-9) with 3 x 3 x 3 Superstructure",
pages = "66-55",
number = "1",
volume = "53",
doi = "10.2298/SOS2101055D"
}

Dapčević, A., Radojković, A., Žunić, M., Počuča-Nešić, M., Milošević, O.,& Branković, G.. (2021). Fast Oxide-Ion Conductors in Bi2O3-V2O5 System: Bi108-xVxO162+x(x=4-9) with 3 x 3 x 3 Superstructure. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 53(1), 55-66.
https://doi.org/10.2298/SOS2101055D

Dapčević A, Radojković A, Žunić M, Počuča-Nešić M, Milošević O, Branković G. Fast Oxide-Ion Conductors in Bi2O3-V2O5 System: Bi108-xVxO162+x(x=4-9) with 3 x 3 x 3 Superstructure. in Science of Sintering. 2021;53(1):55-66.
doi:10.2298/SOS2101055D .

Dapčević, Aleksandra, Radojković, Aleksandar, Žunić, Milan, Počuča-Nešić, Milica, Milošević, Olivera, Branković, Goran, "Fast Oxide-Ion Conductors in Bi2O3-V2O5 System: Bi108-xVxO162+x(x=4-9) with 3 x 3 x 3 Superstructure" in Science of Sintering, 53, no. 1 (2021):55-66,
https://doi.org/10.2298/SOS2101055D . .

TY  - JOUR
AU  - Počuča-Nešić, Milica
AU  - Marinković Stanojević, Zorica
AU  - Radović, Miladin
AU  - Benitez, Rogelio
AU  - Jagodic, Marko
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1420
AB  - Intergranular and intragranular cracks that usually form during sintering of yttrium manganite (YMnO3) ceramic samples hinder the densification process of this ceramic and deteriorate its magnetic and ferroelectric properties. To overcome this problem, mechanochemically synthesized YMnO3 powder was sintered using two different processes: Conventional Sintering (CS) and Pulsed Electric Current Sintering (PECS). All samples were characterized by XRD, SEM and FESEM and their magnetic and ferroelectric properties were investigated. Apart from their phase composition, conventionally sintered ceramic samples showed cracks throughout their whole volume, reaching a maximum relative density of 85 %. However, it was found that PECS process could significantly reduce the presence of cracks within samples whose relative density reached 99.8 %.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Processing and Properties of Ceramic Yttrium Manganite Sintered by Different Methods
EP  - 496
IS  - 4
SP  - 485
VL  - 53
DO  - 10.2298/SOS2104485P
ER  - 

@article{
author = "Počuča-Nešić, Milica and Marinković Stanojević, Zorica and Radović, Miladin and Benitez, Rogelio and Jagodic, Marko and Branković, Goran and Branković, Zorica",
year = "2021",
abstract = "Intergranular and intragranular cracks that usually form during sintering of yttrium manganite (YMnO3) ceramic samples hinder the densification process of this ceramic and deteriorate its magnetic and ferroelectric properties. To overcome this problem, mechanochemically synthesized YMnO3 powder was sintered using two different processes: Conventional Sintering (CS) and Pulsed Electric Current Sintering (PECS). All samples were characterized by XRD, SEM and FESEM and their magnetic and ferroelectric properties were investigated. Apart from their phase composition, conventionally sintered ceramic samples showed cracks throughout their whole volume, reaching a maximum relative density of 85 %. However, it was found that PECS process could significantly reduce the presence of cracks within samples whose relative density reached 99.8 %.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Processing and Properties of Ceramic Yttrium Manganite Sintered by Different Methods",
pages = "496-485",
number = "4",
volume = "53",
doi = "10.2298/SOS2104485P"
}

Počuča-Nešić, M., Marinković Stanojević, Z., Radović, M., Benitez, R., Jagodic, M., Branković, G.,& Branković, Z.. (2021). Processing and Properties of Ceramic Yttrium Manganite Sintered by Different Methods. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 53(4), 485-496.
https://doi.org/10.2298/SOS2104485P

Počuča-Nešić M, Marinković Stanojević Z, Radović M, Benitez R, Jagodic M, Branković G, Branković Z. Processing and Properties of Ceramic Yttrium Manganite Sintered by Different Methods. in Science of Sintering. 2021;53(4):485-496.
doi:10.2298/SOS2104485P .

Počuča-Nešić, Milica, Marinković Stanojević, Zorica, Radović, Miladin, Benitez, Rogelio, Jagodic, Marko, Branković, Goran, Branković, Zorica, "Processing and Properties of Ceramic Yttrium Manganite Sintered by Different Methods" in Science of Sintering, 53, no. 4 (2021):485-496,
https://doi.org/10.2298/SOS2104485P . .

TY  - JOUR
AU  - Mitrović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Luković Golić, Danijela
AU  - Ribić, Vesna
AU  - Branković, Zorica
AU  - Savić, Slavica M.
AU  - Dapčević, Aleksandra
AU  - Bernik, Slavko
AU  - Podlogar, Matejka
AU  - Kocen, Matej
AU  - Rapljenović, Zeljko
AU  - Ivek, Tomislav
AU  - Lazović, Vladimir
AU  - Dojčinović, Biljana
AU  - Branković, Goran
PY  - 2020
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1363
AB  - Antimony doped barium-stannate dense ceramic materials were synthesized using spark plasma sintering technique out of mechanically activated precursor powders. The influence of various Sb concentrations (x = 0.00 - 0.10) on properties of BaSn1-xSbxO3 ceramics was investigated. Relative densities of prepared samples were in the range of (79-96) %. TEM analysis revealed the presence of many dislocations in undoped BaSnO3, and their significant reduction upon doping with Sb. All samples except BaSn0.92Sb0.08O3 exhibit non-linear I-U characteristic, typical for semiconductors with potential barrier at grain boundaries. Low angle grain boundaries found only in BaSn0.92Sb0.08O3 caused the loss of potential barrier at grain boundaries which was confirmed by AC impedance spectroscopy measurements. Consequently, BaSn0.92Sb0.08O3 showed the lowest electrical resistivity and linear I-U characteristic. UV-vis analysis confirmed the increasing of band gap (Burstein-Moss shift) values in all doped samples.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of the European Ceramic Society
T1  - The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics
EP  - 5575
IS  - 15
SP  - 5566
VL  - 40
DO  - 10.1016/j.jeurceramsoc.2020.06.062
ER  - 

@article{
author = "Mitrović, Jelena and Počuča-Nešić, Milica and Luković Golić, Danijela and Ribić, Vesna and Branković, Zorica and Savić, Slavica M. and Dapčević, Aleksandra and Bernik, Slavko and Podlogar, Matejka and Kocen, Matej and Rapljenović, Zeljko and Ivek, Tomislav and Lazović, Vladimir and Dojčinović, Biljana and Branković, Goran",
year = "2020",
abstract = "Antimony doped barium-stannate dense ceramic materials were synthesized using spark plasma sintering technique out of mechanically activated precursor powders. The influence of various Sb concentrations (x = 0.00 - 0.10) on properties of BaSn1-xSbxO3 ceramics was investigated. Relative densities of prepared samples were in the range of (79-96) %. TEM analysis revealed the presence of many dislocations in undoped BaSnO3, and their significant reduction upon doping with Sb. All samples except BaSn0.92Sb0.08O3 exhibit non-linear I-U characteristic, typical for semiconductors with potential barrier at grain boundaries. Low angle grain boundaries found only in BaSn0.92Sb0.08O3 caused the loss of potential barrier at grain boundaries which was confirmed by AC impedance spectroscopy measurements. Consequently, BaSn0.92Sb0.08O3 showed the lowest electrical resistivity and linear I-U characteristic. UV-vis analysis confirmed the increasing of band gap (Burstein-Moss shift) values in all doped samples.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of the European Ceramic Society",
title = "The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics",
pages = "5575-5566",
number = "15",
volume = "40",
doi = "10.1016/j.jeurceramsoc.2020.06.062"
}

Mitrović, J., Počuča-Nešić, M., Luković Golić, D., Ribić, V., Branković, Z., Savić, S. M., Dapčević, A., Bernik, S., Podlogar, M., Kocen, M., Rapljenović, Z., Ivek, T., Lazović, V., Dojčinović, B.,& Branković, G.. (2020). The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics. in Journal of the European Ceramic Society
Elsevier Sci Ltd, Oxford., 40(15), 5566-5575.
https://doi.org/10.1016/j.jeurceramsoc.2020.06.062

Mitrović J, Počuča-Nešić M, Luković Golić D, Ribić V, Branković Z, Savić SM, Dapčević A, Bernik S, Podlogar M, Kocen M, Rapljenović Z, Ivek T, Lazović V, Dojčinović B, Branković G. The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics. in Journal of the European Ceramic Society. 2020;40(15):5566-5575.
doi:10.1016/j.jeurceramsoc.2020.06.062 .

Mitrović, Jelena, Počuča-Nešić, Milica, Luković Golić, Danijela, Ribić, Vesna, Branković, Zorica, Savić, Slavica M., Dapčević, Aleksandra, Bernik, Slavko, Podlogar, Matejka, Kocen, Matej, Rapljenović, Zeljko, Ivek, Tomislav, Lazović, Vladimir, Dojčinović, Biljana, Branković, Goran, "The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics" in Journal of the European Ceramic Society, 40, no. 15 (2020):5566-5575,
https://doi.org/10.1016/j.jeurceramsoc.2020.06.062 . .

TY  - CONF
AU  - Počuča-Nešić, Milica
AU  - Vojisavljević, Katarina
AU  - Savic, Slavica
AU  - Ribić, Vesna
AU  - Tasić, Nikola
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2315
AB  - In this work, two different syntheses approaches – nanocasting and sol-gel
technique were employed for the preparation of SnO2 powders for humidity sensors.
Stock solution of SnCl2 in ethanol (0.5 M) was used as a Sn-precursor for both
syntheses.
In the first procedure, this solution was infiltrated by wet impregnation method
into the hydrothermally prepared KIT-5 used as silica template. Mesoporous
SnO2/KIT-5 hybrid was obtained after two step loading/calcination process.
Calcination was performed at 550 C for 5 h. In the second procedure, silica
template was excluded from synthetic path. Ethanol solution of SnCl2 was slowly
heated to form the gel which was later submitted to the same calcination conditions
resulting in the preparation of SnO2 nanopowder.
By dispersing the as prepared powders in the ethyl-cellulose/α-terpineol
solution and adding a few drops of acetic acid in the mixture, viscous pastes were
prepared and further homogenized for 24 h with magnetic stirrer. Using doctor blade
applicator a few micron thick films were deposited onto alumina substrates provided
with interdigitated Pt/Ag electrodes.
Sensors’ characteristics were compared by measuring the change of the
complex impedance of the samples exposed to a humid climate chamber
environment at different temperatures and RH values from 40 % to 90 % at 25 °C
and from 30 % to 90 % at 50 °C. The value of impedance measured at 42 Hz and
within the RH range of 40 % to 90 %, changes 53 times at 25 °C, and 96 times at 50
°C. In contrast, for the sensor prepared from chemically derived SnO2, the
impedance changes in a moderate way – 8 times at 25 °C and 3 times at 50 °C. Fast
response/recovery time of the SnO2/KIT-5 hybrid sensor exposed to humidity
change from 40 % – 90 % at room temperature, confirmed superior potentials of this
material for humidity sensing over the SnO2.
PB  - Institute for Multidisciplinary Research, University of Belgrade
C3  - 5th Conference of Serbian Society for Ceramic Materials
T1  - COMPARISON OF SENSING PROPERTIES OF SnO2/KIT-5 AND SnO2 HUMIDITY SENSORS
EP  - 137
SP  - 137
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2315
ER  - 

@conference{
author = "Počuča-Nešić, Milica and Vojisavljević, Katarina and Savic, Slavica and Ribić, Vesna and Tasić, Nikola and Branković, Goran and Branković, Zorica",
year = "2019",
abstract = "In this work, two different syntheses approaches – nanocasting and sol-gel
technique were employed for the preparation of SnO2 powders for humidity sensors.
Stock solution of SnCl2 in ethanol (0.5 M) was used as a Sn-precursor for both
syntheses.
In the first procedure, this solution was infiltrated by wet impregnation method
into the hydrothermally prepared KIT-5 used as silica template. Mesoporous
SnO2/KIT-5 hybrid was obtained after two step loading/calcination process.
Calcination was performed at 550 C for 5 h. In the second procedure, silica
template was excluded from synthetic path. Ethanol solution of SnCl2 was slowly
heated to form the gel which was later submitted to the same calcination conditions
resulting in the preparation of SnO2 nanopowder.
By dispersing the as prepared powders in the ethyl-cellulose/α-terpineol
solution and adding a few drops of acetic acid in the mixture, viscous pastes were
prepared and further homogenized for 24 h with magnetic stirrer. Using doctor blade
applicator a few micron thick films were deposited onto alumina substrates provided
with interdigitated Pt/Ag electrodes.
Sensors’ characteristics were compared by measuring the change of the
complex impedance of the samples exposed to a humid climate chamber
environment at different temperatures and RH values from 40 % to 90 % at 25 °C
and from 30 % to 90 % at 50 °C. The value of impedance measured at 42 Hz and
within the RH range of 40 % to 90 %, changes 53 times at 25 °C, and 96 times at 50
°C. In contrast, for the sensor prepared from chemically derived SnO2, the
impedance changes in a moderate way – 8 times at 25 °C and 3 times at 50 °C. Fast
response/recovery time of the SnO2/KIT-5 hybrid sensor exposed to humidity
change from 40 % – 90 % at room temperature, confirmed superior potentials of this
material for humidity sensing over the SnO2.",
publisher = "Institute for Multidisciplinary Research, University of Belgrade",
journal = "5th Conference of Serbian Society for Ceramic Materials",
title = "COMPARISON OF SENSING PROPERTIES OF SnO2/KIT-5 AND SnO2 HUMIDITY SENSORS",
pages = "137-137",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2315"
}

Počuča-Nešić, M., Vojisavljević, K., Savic, S., Ribić, V., Tasić, N., Branković, G.,& Branković, Z.. (2019). COMPARISON OF SENSING PROPERTIES OF SnO2/KIT-5 AND SnO2 HUMIDITY SENSORS. in 5th Conference of Serbian Society for Ceramic Materials
Institute for Multidisciplinary Research, University of Belgrade., 137-137.
https://hdl.handle.net/21.15107/rcub_rimsi_2315

Počuča-Nešić M, Vojisavljević K, Savic S, Ribić V, Tasić N, Branković G, Branković Z. COMPARISON OF SENSING PROPERTIES OF SnO2/KIT-5 AND SnO2 HUMIDITY SENSORS. in 5th Conference of Serbian Society for Ceramic Materials. 2019;:137-137.
https://hdl.handle.net/21.15107/rcub_rimsi_2315 .

Počuča-Nešić, Milica, Vojisavljević, Katarina, Savic, Slavica, Ribić, Vesna, Tasić, Nikola, Branković, Goran, Branković, Zorica, "COMPARISON OF SENSING PROPERTIES OF SnO2/KIT-5 AND SnO2 HUMIDITY SENSORS" in 5th Conference of Serbian Society for Ceramic Materials (2019):137-137,
https://hdl.handle.net/21.15107/rcub_rimsi_2315 .

TY  - CONF
AU  - Savic, Slavica
AU  - Vojisavljević, Katarina
AU  - Počuča-Nešić, Milica
AU  - Knezevic, Nikola
AU  - Mladenović, Minja
AU  - Djokic, Veljko
AU  - Branković, Zorica
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2312
AB  - Over the past decade, the interest for fabrication of mesoporous metal oxides
has been increased, and that draw attention globally on fabrication and designing
efficient humidity sensors based on these materials. Their unique properties like
high surface area, large pore volume and interconnected pore channels provide
easier adsorption and facile transportation of water molecules across their surfaces.
Nanocasting as technique based on various silica hard templates is one of usually
utilized and efficient methods for processing of such materials.
Silica SBA-15 as a template is currently obtaining exclusive attention in
applications like photocatalysis, sensing, drug delivery and nanomaterials
fabrication since it has high surface area, pore volume, excellent thermal stability
and distinctive interconnectivity of its tunable pore channels. In this work, we used
SBA-15 as a hard template for production of SnO2 humidity sensor. SBA-15
assisted mesoporous SnO2 has been synthesized using incipient wet impregnation
process, consisting of two loading/calcination steps to fill up 15 % of the total pore
volume of template with SnO2, followed by template etching with 2M NaOH.
A few micron thick SnO2 film has been fabricated by applying the paste by the
doctor blade applicator onto alumina substrate provided with interdigitated Pt/Ag
electrodes. The sensor response of the film towards humidity was tested measuring
the change of the complex impedance of the sample exposed to a humid climate
chamber environment with the relative humidity, RH ranging from 40 % to 90 % at
25 °C and from 30 % to 90 % at 50 °C. This study demonstrated that nanocast SnO2
possesses sufficient quality to be used as a material for fabrication of high
performance humidity sensors.
PB  - Institute for Multidisciplinary Research, University of Belgrade
C3  - 5th Conference of Serbian Society for Ceramic Materials
T1  - SBA-15 ASSISTED SnO2 HUMIDITY SENSOR
EP  - 135
SP  - 135
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2312
ER  - 

@conference{
author = "Savic, Slavica and Vojisavljević, Katarina and Počuča-Nešić, Milica and Knezevic, Nikola and Mladenović, Minja and Djokic, Veljko and Branković, Zorica",
year = "2019",
abstract = "Over the past decade, the interest for fabrication of mesoporous metal oxides
has been increased, and that draw attention globally on fabrication and designing
efficient humidity sensors based on these materials. Their unique properties like
high surface area, large pore volume and interconnected pore channels provide
easier adsorption and facile transportation of water molecules across their surfaces.
Nanocasting as technique based on various silica hard templates is one of usually
utilized and efficient methods for processing of such materials.
Silica SBA-15 as a template is currently obtaining exclusive attention in
applications like photocatalysis, sensing, drug delivery and nanomaterials
fabrication since it has high surface area, pore volume, excellent thermal stability
and distinctive interconnectivity of its tunable pore channels. In this work, we used
SBA-15 as a hard template for production of SnO2 humidity sensor. SBA-15
assisted mesoporous SnO2 has been synthesized using incipient wet impregnation
process, consisting of two loading/calcination steps to fill up 15 % of the total pore
volume of template with SnO2, followed by template etching with 2M NaOH.
A few micron thick SnO2 film has been fabricated by applying the paste by the
doctor blade applicator onto alumina substrate provided with interdigitated Pt/Ag
electrodes. The sensor response of the film towards humidity was tested measuring
the change of the complex impedance of the sample exposed to a humid climate
chamber environment with the relative humidity, RH ranging from 40 % to 90 % at
25 °C and from 30 % to 90 % at 50 °C. This study demonstrated that nanocast SnO2
possesses sufficient quality to be used as a material for fabrication of high
performance humidity sensors.",
publisher = "Institute for Multidisciplinary Research, University of Belgrade",
journal = "5th Conference of Serbian Society for Ceramic Materials",
title = "SBA-15 ASSISTED SnO2 HUMIDITY SENSOR",
pages = "135-135",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2312"
}

Savic, S., Vojisavljević, K., Počuča-Nešić, M., Knezevic, N., Mladenović, M., Djokic, V.,& Branković, Z.. (2019). SBA-15 ASSISTED SnO2 HUMIDITY SENSOR. in 5th Conference of Serbian Society for Ceramic Materials
Institute for Multidisciplinary Research, University of Belgrade., 135-135.
https://hdl.handle.net/21.15107/rcub_rimsi_2312

Savic S, Vojisavljević K, Počuča-Nešić M, Knezevic N, Mladenović M, Djokic V, Branković Z. SBA-15 ASSISTED SnO2 HUMIDITY SENSOR. in 5th Conference of Serbian Society for Ceramic Materials. 2019;:135-135.
https://hdl.handle.net/21.15107/rcub_rimsi_2312 .

Savic, Slavica, Vojisavljević, Katarina, Počuča-Nešić, Milica, Knezevic, Nikola, Mladenović, Minja, Djokic, Veljko, Branković, Zorica, "SBA-15 ASSISTED SnO2 HUMIDITY SENSOR" in 5th Conference of Serbian Society for Ceramic Materials (2019):135-135,
https://hdl.handle.net/21.15107/rcub_rimsi_2312 .

TY  - CONF
AU  - Vojisavljević, Katarina
AU  - Savic, Slavica
AU  - Počuča-Nešić, Milica
AU  - Djokic, Veljko
AU  - Ribić, Vesna
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2311
AB  - In this contribution, the mesoporous SnO2 was fabricated via nanocasting,
where the hydrothermally processed silica KIT-5 with a high specific surface area of
610 m2/g and pore volume of 0.72 cm3/g was used as a hard template. Following the
two precursor loading/calcination steps of the wet impregnation process, the
appropriate amount of the Sn- precursor solution was used to fill up 15 % of the total
pore volume of the silica template with SnO2. This synthesis route with a template
etching by 2M NaOH solution resulted in nanocast SnO2 with Brunauer-Emmett-
Teller specific surface area of 33 m2/g, where SnO2 nanoparticles of 8–10 nm
formed the ordered domains along with fractions of disordered regions, as confirmed
by the transmission electron microscopy (TEM). Based on the Barrett-Joyner-
Halenda model from the desorption branch of the N2 adsorption/desorption
isotherms, the pore size of SnO2 is centered at 8.6 nm, demonstrating quite open and
accessible pore structure of the material. Wide-angle X-ray diffraction (XRD)
measurement confirmed the formation of the tetragonal SnO2 phase. Because of the
low Si content after the template etching (< 0.5%, confirmed by EDS analysis),
formation of substantial amounts of SnSiO3 can be excluded, and no evidence for
such phase was found in the XRD.
The as prepared SnO2 nanocast was further used to fabricate a few micron thick
film by the doctor blade technique on alumina substrate provided with interdigitated
Pt/Ag electrodes. The sensor response of the film towards humidity was tested
measuring the change of the complex impedance of the sample exposed to a humid
climate chamber environment with the relative humidity (RH) ranging from 40% to
90% at 25 °C and from 30% to 90% at 50 °C. The value of impedance measured at
100 Hz and 25 oC was reduced 132 times within the RH range of 40 % to 90 %,
while it tended to decrease in a moderate manner at 50 °C under the same frequency
and RH range. The film exhibited remarkably rapid response (4 s) and quick
recovery time (6 s) when exposed to RH change from 37% to 90% at 25 °C. Such a
fast response/recovery time and relatively low hysteresis of 4% observed under 50
% RH and 25 °C indicate the promising potentials of nanocasted SnO2 to be used as
an active layer for humidity sensors.
PB  - Institute for Multidisciplinary Research, University of Belgrade
C3  - 5th Conference of Serbian Society for Ceramic Materials
T1  - Humidity sensor based on mesoporous SnO2 fabricated via nanocasting technique
EP  - 66
SP  - 66
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2311
ER  - 

@conference{
author = "Vojisavljević, Katarina and Savic, Slavica and Počuča-Nešić, Milica and Djokic, Veljko and Ribić, Vesna and Branković, Zorica and Branković, Goran",
year = "2019",
abstract = "In this contribution, the mesoporous SnO2 was fabricated via nanocasting,
where the hydrothermally processed silica KIT-5 with a high specific surface area of
610 m2/g and pore volume of 0.72 cm3/g was used as a hard template. Following the
two precursor loading/calcination steps of the wet impregnation process, the
appropriate amount of the Sn- precursor solution was used to fill up 15 % of the total
pore volume of the silica template with SnO2. This synthesis route with a template
etching by 2M NaOH solution resulted in nanocast SnO2 with Brunauer-Emmett-
Teller specific surface area of 33 m2/g, where SnO2 nanoparticles of 8–10 nm
formed the ordered domains along with fractions of disordered regions, as confirmed
by the transmission electron microscopy (TEM). Based on the Barrett-Joyner-
Halenda model from the desorption branch of the N2 adsorption/desorption
isotherms, the pore size of SnO2 is centered at 8.6 nm, demonstrating quite open and
accessible pore structure of the material. Wide-angle X-ray diffraction (XRD)
measurement confirmed the formation of the tetragonal SnO2 phase. Because of the
low Si content after the template etching (< 0.5%, confirmed by EDS analysis),
formation of substantial amounts of SnSiO3 can be excluded, and no evidence for
such phase was found in the XRD.
The as prepared SnO2 nanocast was further used to fabricate a few micron thick
film by the doctor blade technique on alumina substrate provided with interdigitated
Pt/Ag electrodes. The sensor response of the film towards humidity was tested
measuring the change of the complex impedance of the sample exposed to a humid
climate chamber environment with the relative humidity (RH) ranging from 40% to
90% at 25 °C and from 30% to 90% at 50 °C. The value of impedance measured at
100 Hz and 25 oC was reduced 132 times within the RH range of 40 % to 90 %,
while it tended to decrease in a moderate manner at 50 °C under the same frequency
and RH range. The film exhibited remarkably rapid response (4 s) and quick
recovery time (6 s) when exposed to RH change from 37% to 90% at 25 °C. Such a
fast response/recovery time and relatively low hysteresis of 4% observed under 50
% RH and 25 °C indicate the promising potentials of nanocasted SnO2 to be used as
an active layer for humidity sensors.",
publisher = "Institute for Multidisciplinary Research, University of Belgrade",
journal = "5th Conference of Serbian Society for Ceramic Materials",
title = "Humidity sensor based on mesoporous SnO2 fabricated via nanocasting technique",
pages = "66-66",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2311"
}

Vojisavljević, K., Savic, S., Počuča-Nešić, M., Djokic, V., Ribić, V., Branković, Z.,& Branković, G.. (2019). Humidity sensor based on mesoporous SnO2 fabricated via nanocasting technique. in 5th Conference of Serbian Society for Ceramic Materials
Institute for Multidisciplinary Research, University of Belgrade., 66-66.
https://hdl.handle.net/21.15107/rcub_rimsi_2311

Vojisavljević K, Savic S, Počuča-Nešić M, Djokic V, Ribić V, Branković Z, Branković G. Humidity sensor based on mesoporous SnO2 fabricated via nanocasting technique. in 5th Conference of Serbian Society for Ceramic Materials. 2019;:66-66.
https://hdl.handle.net/21.15107/rcub_rimsi_2311 .

Vojisavljević, Katarina, Savic, Slavica, Počuča-Nešić, Milica, Djokic, Veljko, Ribić, Vesna, Branković, Zorica, Branković, Goran, "Humidity sensor based on mesoporous SnO2 fabricated via nanocasting technique" in 5th Conference of Serbian Society for Ceramic Materials (2019):66-66,
https://hdl.handle.net/21.15107/rcub_rimsi_2311 .

TY  - CONF
AU  - Milošević, Olivera
AU  - Luković Golić, Danijela
AU  - Počuča-Nešić, Milica
AU  - Dapčević, Aleksandra
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - Zemljak, Olivera
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2360
AB  - Yttrium manganite, YMnO3, is a multiferroic material, which exhibits ferroelectric and antiferromagnetic behavior. These properties make it suitable for various applications. Large microcracking and porosity in YMnO3 ceramics strongly affect the material’s ferroelectric response. In this work, the effect of Ti doping on structure, microstructure and ferroelectric properties of YMnO3 ceramics was investigated. The powders YMn1-xTixO3 (x = 0; 0.10; 0.15; 0.20) were prepared by polymerization complex (PC) method from citrate precursors, and calcined at 900 °C for 4 h. The ceramic samples YMnO3 (YMO) and YMn0.9Ti0.1O3 (YMTO10) were obtained after sintering at 1400 °C, YMn0.85Ti0.15O3 (YMTO15) – at 1450 C and YMn0.8Ti0.2O3 (YMTO20) – at 1470 °C, for 2 h. Structural properties and phase composition of sintered samples were analyzed by X-ray diffraction (XRD) and their microstructure by scanning electron microscopy (SEM). Ferroelectric characterization was carried out by measuring of P(E) hysteresis loops and leakage current density (jl). XRD patterns of all ceramic samples revealed single-phased hexagonal (P63cm) structure. It was observed that Ti-doped YMnO3 ceramic samples have reduced microcracking, inter- and intragranular porosity. Leakage current densities of the
samples YMTO10 and YMTO20 were lower compared to that of sample YMO. YMTO20 showed higher electrical conductivity, but all samples indicated weak ferroelectric response.
PB  - Institut za multicisciplinarna istrživanja, Belgrade, Serbia
C3  - 5th Conference of The Serbian Society for Ceramic Materials June 11-13, 2019 Belgrade, Serbia 5CSCS-2019
T1  - Structural, microstructural abd ferroelectric properties of Ti-doped YMnO3 ceramics synthesized by polymerization complex method
SP  - 133
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2360
ER  - 

@conference{
author = "Milošević, Olivera and Luković Golić, Danijela and Počuča-Nešić, Milica and Dapčević, Aleksandra and Branković, Goran and Branković, Zorica and Zemljak, Olivera",
year = "2019",
abstract = "Yttrium manganite, YMnO3, is a multiferroic material, which exhibits ferroelectric and antiferromagnetic behavior. These properties make it suitable for various applications. Large microcracking and porosity in YMnO3 ceramics strongly affect the material’s ferroelectric response. In this work, the effect of Ti doping on structure, microstructure and ferroelectric properties of YMnO3 ceramics was investigated. The powders YMn1-xTixO3 (x = 0; 0.10; 0.15; 0.20) were prepared by polymerization complex (PC) method from citrate precursors, and calcined at 900 °C for 4 h. The ceramic samples YMnO3 (YMO) and YMn0.9Ti0.1O3 (YMTO10) were obtained after sintering at 1400 °C, YMn0.85Ti0.15O3 (YMTO15) – at 1450 C and YMn0.8Ti0.2O3 (YMTO20) – at 1470 °C, for 2 h. Structural properties and phase composition of sintered samples were analyzed by X-ray diffraction (XRD) and their microstructure by scanning electron microscopy (SEM). Ferroelectric characterization was carried out by measuring of P(E) hysteresis loops and leakage current density (jl). XRD patterns of all ceramic samples revealed single-phased hexagonal (P63cm) structure. It was observed that Ti-doped YMnO3 ceramic samples have reduced microcracking, inter- and intragranular porosity. Leakage current densities of the
samples YMTO10 and YMTO20 were lower compared to that of sample YMO. YMTO20 showed higher electrical conductivity, but all samples indicated weak ferroelectric response.",
publisher = "Institut za multicisciplinarna istrživanja, Belgrade, Serbia",
journal = "5th Conference of The Serbian Society for Ceramic Materials June 11-13, 2019 Belgrade, Serbia 5CSCS-2019",
title = "Structural, microstructural abd ferroelectric properties of Ti-doped YMnO3 ceramics synthesized by polymerization complex method",
pages = "133",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2360"
}

Milošević, O., Luković Golić, D., Počuča-Nešić, M., Dapčević, A., Branković, G., Branković, Z.,& Zemljak, O.. (2019). Structural, microstructural abd ferroelectric properties of Ti-doped YMnO3 ceramics synthesized by polymerization complex method. in 5th Conference of The Serbian Society for Ceramic Materials June 11-13, 2019 Belgrade, Serbia 5CSCS-2019
Institut za multicisciplinarna istrživanja, Belgrade, Serbia., 133.
https://hdl.handle.net/21.15107/rcub_rimsi_2360

Milošević O, Luković Golić D, Počuča-Nešić M, Dapčević A, Branković G, Branković Z, Zemljak O. Structural, microstructural abd ferroelectric properties of Ti-doped YMnO3 ceramics synthesized by polymerization complex method. in 5th Conference of The Serbian Society for Ceramic Materials June 11-13, 2019 Belgrade, Serbia 5CSCS-2019. 2019;:133.
https://hdl.handle.net/21.15107/rcub_rimsi_2360 .

Milošević, Olivera, Luković Golić, Danijela, Počuča-Nešić, Milica, Dapčević, Aleksandra, Branković, Goran, Branković, Zorica, Zemljak, Olivera, "Structural, microstructural abd ferroelectric properties of Ti-doped YMnO3 ceramics synthesized by polymerization complex method" in 5th Conference of The Serbian Society for Ceramic Materials June 11-13, 2019 Belgrade, Serbia 5CSCS-2019 (2019):133,
https://hdl.handle.net/21.15107/rcub_rimsi_2360 .

TY  - CONF
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Luković Golić, Danijela
AU  - Ribić, Vesna
AU  - Branković, Zorica
AU  - Dapčević, Aleksandra
AU  - Bernik, Slavko
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2071
AB  - BaSnO3 (BSO) belongs to the perovskite-type oxides with a cubic crystal structure. It
exhibits interesting electrical, optical and photocatalytic properties. BSO has a potential
application as transparent conductor, gas sensor, photocatalyst or dielectric capacitor. It is
an insulating material with wide band gap (Eg = 3.1–3.4 eV), but its electrical properties
can be adjusted by doping with aliovalent cations.
In this work, we investigated the influence of antimony (Sb3+), as a dopant, on crystal
structure, microstructural and electrical properties of BSO ceramics. Stoichiometric
mixture of powders BaCO3, SnO2 and Sb2O3 was mechanochemically activated in a
planetary ball mill and afterwards calcined at 900 ºC for 4 h. As-prepared powders were
sintered by spark plasma sintering technique (1200 ºC for 5 min) in order to produce
ceramic samples BaSn1-xSbxO3 (x = 0.00, 0.04, 0.06, 0.08 and 0.10). All samples were
characterized using X-ray Diffraction (XRD) analysis, High Resolution Transmission
(HRTEM) and Field Emission Electron Microscopy (FESEM). Electrical conductivity of
BaSn1-xSbxO3 ceramics was determined by measuring of the current-voltage (I–U)
characteristics in different mediums and at different temperatures.
XRD analysis confirmed the existence of cubic BSO, as a dominant phase, and
tetragonal Ba2SnO4, as a secondary phase. FESEM analysis revealed homogenous
microstructure in all samples and noticeable decrease of the grain size in doped samples
compared to BSO. HRTEM micrographs of the undoped sample showed less ordered
microstructure with amorphous phase in the grain boundary region. Doped samples
revealed much higher crystallinity, especially in the grain boundary regions without
presence of defects. Low angle grain boundaries (LAGB) are observed (the angle equals
2.08°) on the HRTEM micrographs of BaSn0.92Sb0.08O3. It was observed that all doped
samples are n-type semiconductors, having linear I–U characteristics up to 150 °C.
Sample BaSn0.92Sb0.08O3 showed the highest conductivity, most likely due to the presence
of the LAGB, which allow easier charge carrier transfer between grains and greater
carrier mobility [1].
[1] Y. Furushima, A. Nakamura, E. Tochigi, Y. Ikuhara, K. Toyoura, K. Matsunaga, J.
Appl. Phys., 120 (2016) 1421071–1421079.
PB  - Serbian Crystallographic Society
C3  - 26th Conference of the Serbian Crystallographic Society, June 27-28, 2019, Silver Lake, Serbia
T1  - Structural, microstructural and electrical properties of Sb-doped BaSnO3 ceramics
EP  - 73
SP  - 72
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2071
ER  - 

@conference{
author = "Vukašinović, Jelena and Počuča-Nešić, Milica and Luković Golić, Danijela and Ribić, Vesna and Branković, Zorica and Dapčević, Aleksandra and Bernik, Slavko and Branković, Goran",
year = "2019",
abstract = "BaSnO3 (BSO) belongs to the perovskite-type oxides with a cubic crystal structure. It
exhibits interesting electrical, optical and photocatalytic properties. BSO has a potential
application as transparent conductor, gas sensor, photocatalyst or dielectric capacitor. It is
an insulating material with wide band gap (Eg = 3.1–3.4 eV), but its electrical properties
can be adjusted by doping with aliovalent cations.
In this work, we investigated the influence of antimony (Sb3+), as a dopant, on crystal
structure, microstructural and electrical properties of BSO ceramics. Stoichiometric
mixture of powders BaCO3, SnO2 and Sb2O3 was mechanochemically activated in a
planetary ball mill and afterwards calcined at 900 ºC for 4 h. As-prepared powders were
sintered by spark plasma sintering technique (1200 ºC for 5 min) in order to produce
ceramic samples BaSn1-xSbxO3 (x = 0.00, 0.04, 0.06, 0.08 and 0.10). All samples were
characterized using X-ray Diffraction (XRD) analysis, High Resolution Transmission
(HRTEM) and Field Emission Electron Microscopy (FESEM). Electrical conductivity of
BaSn1-xSbxO3 ceramics was determined by measuring of the current-voltage (I–U)
characteristics in different mediums and at different temperatures.
XRD analysis confirmed the existence of cubic BSO, as a dominant phase, and
tetragonal Ba2SnO4, as a secondary phase. FESEM analysis revealed homogenous
microstructure in all samples and noticeable decrease of the grain size in doped samples
compared to BSO. HRTEM micrographs of the undoped sample showed less ordered
microstructure with amorphous phase in the grain boundary region. Doped samples
revealed much higher crystallinity, especially in the grain boundary regions without
presence of defects. Low angle grain boundaries (LAGB) are observed (the angle equals
2.08°) on the HRTEM micrographs of BaSn0.92Sb0.08O3. It was observed that all doped
samples are n-type semiconductors, having linear I–U characteristics up to 150 °C.
Sample BaSn0.92Sb0.08O3 showed the highest conductivity, most likely due to the presence
of the LAGB, which allow easier charge carrier transfer between grains and greater
carrier mobility [1].
[1] Y. Furushima, A. Nakamura, E. Tochigi, Y. Ikuhara, K. Toyoura, K. Matsunaga, J.
Appl. Phys., 120 (2016) 1421071–1421079.",
publisher = "Serbian Crystallographic Society",
journal = "26th Conference of the Serbian Crystallographic Society, June 27-28, 2019, Silver Lake, Serbia",
title = "Structural, microstructural and electrical properties of Sb-doped BaSnO3 ceramics",
pages = "73-72",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2071"
}

Vukašinović, J., Počuča-Nešić, M., Luković Golić, D., Ribić, V., Branković, Z., Dapčević, A., Bernik, S.,& Branković, G.. (2019). Structural, microstructural and electrical properties of Sb-doped BaSnO3 ceramics. in 26th Conference of the Serbian Crystallographic Society, June 27-28, 2019, Silver Lake, Serbia
Serbian Crystallographic Society., 72-73.
https://hdl.handle.net/21.15107/rcub_rimsi_2071

Vukašinović J, Počuča-Nešić M, Luković Golić D, Ribić V, Branković Z, Dapčević A, Bernik S, Branković G. Structural, microstructural and electrical properties of Sb-doped BaSnO3 ceramics. in 26th Conference of the Serbian Crystallographic Society, June 27-28, 2019, Silver Lake, Serbia. 2019;:72-73.
https://hdl.handle.net/21.15107/rcub_rimsi_2071 .

Vukašinović, Jelena, Počuča-Nešić, Milica, Luković Golić, Danijela, Ribić, Vesna, Branković, Zorica, Dapčević, Aleksandra, Bernik, Slavko, Branković, Goran, "Structural, microstructural and electrical properties of Sb-doped BaSnO3 ceramics" in 26th Conference of the Serbian Crystallographic Society, June 27-28, 2019, Silver Lake, Serbia (2019):72-73,
https://hdl.handle.net/21.15107/rcub_rimsi_2071 .

TY  - CONF
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Luković Golić, Danijela
AU  - Dapčević, Aleksandra
AU  - Kocen, Matej
AU  - Bernik, Slavko
AU  - Lazović, Vladimir
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2037
AB  - Barium stannate, BaSnO3, belongs to the group of perovskite-type alkaline earth
stannates. It is an electrical insulator, but doping with proper cation can change its’
electrical properties and transform it into an n-type semiconductor.
In this work, we present the Sb-doped barium stannate, BaSn1-xSbxO3, x = 0.00,
0.04, 0.06, 0.08 and 0.10 (labelled as BSSOx100), using BaCO3, SnO2 and Sb2O5
as starting materials. Mechanically activated precursors were calcined at 900 °C for
4 h and subsequently sintered by Spark Plasma Sintering (SPS) Technique. For the
characterization of obtained ceramic samples various techniques were used: X-ray
Diffraction (XRD) analysis, High Resolution Transmission and Field Emission
electron microscopy (HRTEM and FESEM) and UV-Vis spectroscopy. Electrical
conductivity of BaSn1-xSbxO3 ceramic samples was determined by measuring the
current-voltage (I–U) characteristics in different mediums (air, silicon oil) at room
temperature and temperatures up to 150 °C.
XRD analysis confirmed the formation of the cubic BaSnO3 perovskite phase as
a major, and tetragonal Ba2SnO4 as a secondary phase. The content of Ba2SnO4
phase decreased with introducing of Sb into the BaSnO3 lattice. FESEM
micrographs of fractured BaSn1-xSbxO3 ceramic samples showed well-densified
microstructure and decrease of grain size with the increment of x. HRTEM analyses
revealed the existence of low angle grain boundary (LAGB), which provides low
energy conduction path of electrons. The results obtained from UV-Vis
spectroscopy, indicated the decrease of band gap value of BaSn1-xSbxO3 samples
with increasing Sb concentration. Electrical characterization confirmed that Sbdoped
BaSnO3 exhibits n-type conductivity. BaSn1-xSbxO3 samples with x = 0.04,
0.06, 0.08 showed linear I–U characteristics at temperatures up to 150 ºC. The
highest electrical conductivity was 1.96 S/cm for the BaSn0.92Sb0.08O3. The increase
of Sb concentration to x = 0.10 led to the loss of I–U characteristics' linearity.
PB  - University of Belgrade, Institute for Multidisciplinary Research
C3  - 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade
T1  - Spark plasma sintering of conductive Sb-doped BaSnO3
SP  - 136
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2037
ER  - 

@conference{
author = "Vukašinović, Jelena and Počuča-Nešić, Milica and Luković Golić, Danijela and Dapčević, Aleksandra and Kocen, Matej and Bernik, Slavko and Lazović, Vladimir and Branković, Zorica and Branković, Goran",
year = "2019",
abstract = "Barium stannate, BaSnO3, belongs to the group of perovskite-type alkaline earth
stannates. It is an electrical insulator, but doping with proper cation can change its’
electrical properties and transform it into an n-type semiconductor.
In this work, we present the Sb-doped barium stannate, BaSn1-xSbxO3, x = 0.00,
0.04, 0.06, 0.08 and 0.10 (labelled as BSSOx100), using BaCO3, SnO2 and Sb2O5
as starting materials. Mechanically activated precursors were calcined at 900 °C for
4 h and subsequently sintered by Spark Plasma Sintering (SPS) Technique. For the
characterization of obtained ceramic samples various techniques were used: X-ray
Diffraction (XRD) analysis, High Resolution Transmission and Field Emission
electron microscopy (HRTEM and FESEM) and UV-Vis spectroscopy. Electrical
conductivity of BaSn1-xSbxO3 ceramic samples was determined by measuring the
current-voltage (I–U) characteristics in different mediums (air, silicon oil) at room
temperature and temperatures up to 150 °C.
XRD analysis confirmed the formation of the cubic BaSnO3 perovskite phase as
a major, and tetragonal Ba2SnO4 as a secondary phase. The content of Ba2SnO4
phase decreased with introducing of Sb into the BaSnO3 lattice. FESEM
micrographs of fractured BaSn1-xSbxO3 ceramic samples showed well-densified
microstructure and decrease of grain size with the increment of x. HRTEM analyses
revealed the existence of low angle grain boundary (LAGB), which provides low
energy conduction path of electrons. The results obtained from UV-Vis
spectroscopy, indicated the decrease of band gap value of BaSn1-xSbxO3 samples
with increasing Sb concentration. Electrical characterization confirmed that Sbdoped
BaSnO3 exhibits n-type conductivity. BaSn1-xSbxO3 samples with x = 0.04,
0.06, 0.08 showed linear I–U characteristics at temperatures up to 150 ºC. The
highest electrical conductivity was 1.96 S/cm for the BaSn0.92Sb0.08O3. The increase
of Sb concentration to x = 0.10 led to the loss of I–U characteristics' linearity.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade",
title = "Spark plasma sintering of conductive Sb-doped BaSnO3",
pages = "136",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2037"
}

Vukašinović, J., Počuča-Nešić, M., Luković Golić, D., Dapčević, A., Kocen, M., Bernik, S., Lazović, V., Branković, Z.,& Branković, G.. (2019). Spark plasma sintering of conductive Sb-doped BaSnO3. in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade
University of Belgrade, Institute for Multidisciplinary Research., 136.
https://hdl.handle.net/21.15107/rcub_rimsi_2037

Vukašinović J, Počuča-Nešić M, Luković Golić D, Dapčević A, Kocen M, Bernik S, Lazović V, Branković Z, Branković G. Spark plasma sintering of conductive Sb-doped BaSnO3. in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade. 2019;:136.
https://hdl.handle.net/21.15107/rcub_rimsi_2037 .

Vukašinović, Jelena, Počuča-Nešić, Milica, Luković Golić, Danijela, Dapčević, Aleksandra, Kocen, Matej, Bernik, Slavko, Lazović, Vladimir, Branković, Zorica, Branković, Goran, "Spark plasma sintering of conductive Sb-doped BaSnO3" in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade (2019):136,
https://hdl.handle.net/21.15107/rcub_rimsi_2037 .

TY  - CONF
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Dapčević, Aleksandra
AU  - Ribić, Vesna
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2030
AB  - Lanthanum nickelate (LaNiO3, LNO) belongs to the group of materials with
perovskite-type structure and it crystallizes in rhombohedrally distorted perovskite
lattice. This material exhibits interesting electrical, magnetic, optical and catalytic
properties and it is suitable for various applications. Still, the preparation of single
phase LNO is difficult, because at temperatures above 850 °C it decomposes into the
lower oxides with formula Lan+1NinO3n+1 (n = 3, 2, 1) and NiO.
In this work we present the synthesis of pure and Nb doped LNO powders,
LaNi1-xNbxO3 (x = 0.000, 0.005, 0.010) prepared from mechanochemically activated
oxide precursors – La2O3, NiO and Nb2O5. For this experiment, precursor powders
homogenized in isopropyl alcohol were dried and mechanochemically activated in
the planetary ball mill for 3 h. As-prepared powders were calcined at 700 °C for 3 h
in air and further analyzed by X-ray diffraction analysis (XRD), Transmission
electron microscopy (TEM), Scanning electron microscopy (SEM) and UV-Vis
spectroscopy. Photocatalytic activity in visible light was investigated.
The XRD analysis of undoped LNO revealed the existence of rhombohedral
LaNiO3 and small amount of NiO phase. The doped samples, apart from LNO,
contained products of thermal decomposition – layered oxides and NiO. TEM and
HRTEM analyses of undoped LNO revealed the presence of agglomerated particles
with single particle size being in the range of 20–40 nm. Doping with Nb led to
decrease of agglomeration process and allowed better dispersion between particles
of LNO based powders. Calculated band gaps were 1.12 eV, 0.89 eV and 0.87 eV
for x = 0.00, 0.005, 0.010. The absorption spectra indicated photocatalytic
degradation of Reactive Orange 16, textile dye used as a model in these
experiments.
PB  - University of Belgrade, Institute for Multidisciplinary Research
C3  - 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
T1  - Synthesis, characterization and photocatalytic properties of LaNiO3-based powders
SP  - 72
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2030
ER  - 

@conference{
author = "Vukašinović, Jelena and Počuča-Nešić, Milica and Dapčević, Aleksandra and Ribić, Vesna and Branković, Goran and Branković, Zorica",
year = "2019",
abstract = "Lanthanum nickelate (LaNiO3, LNO) belongs to the group of materials with
perovskite-type structure and it crystallizes in rhombohedrally distorted perovskite
lattice. This material exhibits interesting electrical, magnetic, optical and catalytic
properties and it is suitable for various applications. Still, the preparation of single
phase LNO is difficult, because at temperatures above 850 °C it decomposes into the
lower oxides with formula Lan+1NinO3n+1 (n = 3, 2, 1) and NiO.
In this work we present the synthesis of pure and Nb doped LNO powders,
LaNi1-xNbxO3 (x = 0.000, 0.005, 0.010) prepared from mechanochemically activated
oxide precursors – La2O3, NiO and Nb2O5. For this experiment, precursor powders
homogenized in isopropyl alcohol were dried and mechanochemically activated in
the planetary ball mill for 3 h. As-prepared powders were calcined at 700 °C for 3 h
in air and further analyzed by X-ray diffraction analysis (XRD), Transmission
electron microscopy (TEM), Scanning electron microscopy (SEM) and UV-Vis
spectroscopy. Photocatalytic activity in visible light was investigated.
The XRD analysis of undoped LNO revealed the existence of rhombohedral
LaNiO3 and small amount of NiO phase. The doped samples, apart from LNO,
contained products of thermal decomposition – layered oxides and NiO. TEM and
HRTEM analyses of undoped LNO revealed the presence of agglomerated particles
with single particle size being in the range of 20–40 nm. Doping with Nb led to
decrease of agglomeration process and allowed better dispersion between particles
of LNO based powders. Calculated band gaps were 1.12 eV, 0.89 eV and 0.87 eV
for x = 0.00, 0.005, 0.010. The absorption spectra indicated photocatalytic
degradation of Reactive Orange 16, textile dye used as a model in these
experiments.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia",
title = "Synthesis, characterization and photocatalytic properties of LaNiO3-based powders",
pages = "72",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2030"
}

Vukašinović, J., Počuča-Nešić, M., Dapčević, A., Ribić, V., Branković, G.,& Branković, Z.. (2019). Synthesis, characterization and photocatalytic properties of LaNiO3-based powders. in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
University of Belgrade, Institute for Multidisciplinary Research., 72.
https://hdl.handle.net/21.15107/rcub_rimsi_2030

Vukašinović J, Počuča-Nešić M, Dapčević A, Ribić V, Branković G, Branković Z. Synthesis, characterization and photocatalytic properties of LaNiO3-based powders. in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia. 2019;:72.
https://hdl.handle.net/21.15107/rcub_rimsi_2030 .

Vukašinović, Jelena, Počuča-Nešić, Milica, Dapčević, Aleksandra, Ribić, Vesna, Branković, Goran, Branković, Zorica, "Synthesis, characterization and photocatalytic properties of LaNiO3-based powders" in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia (2019):72,
https://hdl.handle.net/21.15107/rcub_rimsi_2030 .

TY  - JOUR
AU  - Počuča-Nešić, Milica
AU  - Marinković Stanojević, Zorica
AU  - Smole, Patricia Cotic
AU  - Dapčević, Aleksandra
AU  - Tasić, Nikola
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1265
AB  - Yttrium manganite (YMnO3) is widely investigated multiferroic material with potential use in many technological applications. In this paper, we report on the preparation and characterization of multiferroic hexagonal YMnO3 ceramics obtained by chemical synthesis route. Precursor powders were prepared by the polymerizable complex method from citrate precursors. After calcination at 900 degrees C the powders contained mixture of Y-Mn-O phases which were further sintered at different temperatures. XRD analysis revealed that sintering at 1400 degrees C resulted in the formation of pure hexagonal YMnO3. Density of the obtained ceramics was 96 %TD. The ceramic samples proved to have multiferroic properties - they are antiferromagnetic below 42 K with linear dependence of magnetization as a function of applied magnetic field. The ferroelectric measurements performed at room temperature showed remanent polarization of 0.21 mu C/cm(2) and the coercive field of 6.0 kV/cm for the YMnO3 sample sintered at 1400 degrees C. The magnetization curves measured at 2 and 5 K for the powder samples calcined at 900 degrees C and ceramic samples sintered at 1300 degrees C exhibited a hysteresis loop due to a small concentration of Mn3O4 in the samples.
PB  - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
T2  - Processing and Application of Ceramics
T1  - Processing and properties of pure antiferromagnetic h-YMnO3
EP  - 434
IS  - 4
SP  - 427
VL  - 13
DO  - 10.2298/PAC1904427P
ER  - 

@article{
author = "Počuča-Nešić, Milica and Marinković Stanojević, Zorica and Smole, Patricia Cotic and Dapčević, Aleksandra and Tasić, Nikola and Branković, Goran and Branković, Zorica",
year = "2019",
abstract = "Yttrium manganite (YMnO3) is widely investigated multiferroic material with potential use in many technological applications. In this paper, we report on the preparation and characterization of multiferroic hexagonal YMnO3 ceramics obtained by chemical synthesis route. Precursor powders were prepared by the polymerizable complex method from citrate precursors. After calcination at 900 degrees C the powders contained mixture of Y-Mn-O phases which were further sintered at different temperatures. XRD analysis revealed that sintering at 1400 degrees C resulted in the formation of pure hexagonal YMnO3. Density of the obtained ceramics was 96 %TD. The ceramic samples proved to have multiferroic properties - they are antiferromagnetic below 42 K with linear dependence of magnetization as a function of applied magnetic field. The ferroelectric measurements performed at room temperature showed remanent polarization of 0.21 mu C/cm(2) and the coercive field of 6.0 kV/cm for the YMnO3 sample sintered at 1400 degrees C. The magnetization curves measured at 2 and 5 K for the powder samples calcined at 900 degrees C and ceramic samples sintered at 1300 degrees C exhibited a hysteresis loop due to a small concentration of Mn3O4 in the samples.",
publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad",
journal = "Processing and Application of Ceramics",
title = "Processing and properties of pure antiferromagnetic h-YMnO3",
pages = "434-427",
number = "4",
volume = "13",
doi = "10.2298/PAC1904427P"
}

Počuča-Nešić, M., Marinković Stanojević, Z., Smole, P. C., Dapčević, A., Tasić, N., Branković, G.,& Branković, Z.. (2019). Processing and properties of pure antiferromagnetic h-YMnO3. in Processing and Application of Ceramics
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad., 13(4), 427-434.
https://doi.org/10.2298/PAC1904427P

Počuča-Nešić M, Marinković Stanojević Z, Smole PC, Dapčević A, Tasić N, Branković G, Branković Z. Processing and properties of pure antiferromagnetic h-YMnO3. in Processing and Application of Ceramics. 2019;13(4):427-434.
doi:10.2298/PAC1904427P .

Počuča-Nešić, Milica, Marinković Stanojević, Zorica, Smole, Patricia Cotic, Dapčević, Aleksandra, Tasić, Nikola, Branković, Goran, Branković, Zorica, "Processing and properties of pure antiferromagnetic h-YMnO3" in Processing and Application of Ceramics, 13, no. 4 (2019):427-434,
https://doi.org/10.2298/PAC1904427P . .

TY  - CONF
AU  - Savic, Slavica
AU  - Vojisavljević, Katarina
AU  - Počuča-Nešić, Milica
AU  - Knezevic, Nikola
AU  - Djokic, Veljko
AU  - Ribić, Vesna
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2584
AB  - This work presents the fabrication of humidity sensor based on SnO2 sensing material derived by the
nanocasting process using hydrothermally obtained KIT-5 as a hard template.
In a typical wet impregnation process, the infiltration of Sn precursor into mesoporous silica KIT-5, and later
evaporation of the solvent were conducted to fill pores to 15 % of the template pore volume. The calcination
and removal of the template were performed to obtain the desired mesoporous SnO2. The obtained powder
(P) was mixed with a 10 % ethyl-cellulose in α- terpineol solution (S) and acetic acid (A) in the weight ratio
P:S:A=7:69.7:23.3 to form a homogeneous paste which was further deposited by doctor blade technique
onto alumina substrate with screen printed Pt/Ag electrodes. The film was subjected to a specific drying
regime and finally calcined at 550 °C for 5 h.
The obtained SnO2 nanoparticles as well KIT-5 template were characterized using X-ray diffraction (XRD)
spectroscopy, Brunauer–Emmett–Teller (BET) analysis and Transmission Electron Microscopy (TEM). Cross
section and surface morphology of SnO2 film were characterized by Field Emission Scanning Electron
Microscopy (FESEM). The humidity sensing properties of the mesoporous SnO2 sensor were investigated
in a JEIO TECH TH-KE-025 temperature and humidity climatic chamber in the range 30–90 % RH. Complex
impedance spectra of the as-fabricated sensor were analyzed at room temperature and 50 °C with a HIOKI
3532-50 LCR HiTESTER in a frequency range 42 Hz - 1 MHz.
Nitrogen adsorption isotherms of KIT-5 showed high specific surface area of 610 m2g-1 and an average pore
diameter of 5.2 nm while those values for SnO2 sample were 33 m2g-1 and 19.9 nm respectively. Even
though that mesoporous ordering of nanocasted negative replica was observed by TEM, the presence of
agglomerates in SnO2, as well as the relatively low specific surface area of 33 m2g-1, confirm its partial
degradation. Diffraction patterns from TEM display well-defined rings typical for cassiterite SnO2. The
impedance measured at 42 Hz, at room temperature, and in the range 40-90% RH reduced 509 times,
while at 50 °C it reduced 48 times. The sensor exhibited quick response (5 s) and recovery time (16 s) when
it exposed to humidity change from 37% RH to 90% RH, and relatively low hysteresis of 3.2% observed at
40% RH and at room temperature showing its promising capacity as a humidity sensor.
PB  - Societa ceramica italiana
PB  - Politecnico di Torino
C3  - XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY
T1  - NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION
IS  - 119-ABS 201
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2584
ER  - 

@conference{
author = "Savic, Slavica and Vojisavljević, Katarina and Počuča-Nešić, Milica and Knezevic, Nikola and Djokic, Veljko and Ribić, Vesna and Branković, Goran",
year = "2019",
abstract = "This work presents the fabrication of humidity sensor based on SnO2 sensing material derived by the
nanocasting process using hydrothermally obtained KIT-5 as a hard template.
In a typical wet impregnation process, the infiltration of Sn precursor into mesoporous silica KIT-5, and later
evaporation of the solvent were conducted to fill pores to 15 % of the template pore volume. The calcination
and removal of the template were performed to obtain the desired mesoporous SnO2. The obtained powder
(P) was mixed with a 10 % ethyl-cellulose in α- terpineol solution (S) and acetic acid (A) in the weight ratio
P:S:A=7:69.7:23.3 to form a homogeneous paste which was further deposited by doctor blade technique
onto alumina substrate with screen printed Pt/Ag electrodes. The film was subjected to a specific drying
regime and finally calcined at 550 °C for 5 h.
The obtained SnO2 nanoparticles as well KIT-5 template were characterized using X-ray diffraction (XRD)
spectroscopy, Brunauer–Emmett–Teller (BET) analysis and Transmission Electron Microscopy (TEM). Cross
section and surface morphology of SnO2 film were characterized by Field Emission Scanning Electron
Microscopy (FESEM). The humidity sensing properties of the mesoporous SnO2 sensor were investigated
in a JEIO TECH TH-KE-025 temperature and humidity climatic chamber in the range 30–90 % RH. Complex
impedance spectra of the as-fabricated sensor were analyzed at room temperature and 50 °C with a HIOKI
3532-50 LCR HiTESTER in a frequency range 42 Hz - 1 MHz.
Nitrogen adsorption isotherms of KIT-5 showed high specific surface area of 610 m2g-1 and an average pore
diameter of 5.2 nm while those values for SnO2 sample were 33 m2g-1 and 19.9 nm respectively. Even
though that mesoporous ordering of nanocasted negative replica was observed by TEM, the presence of
agglomerates in SnO2, as well as the relatively low specific surface area of 33 m2g-1, confirm its partial
degradation. Diffraction patterns from TEM display well-defined rings typical for cassiterite SnO2. The
impedance measured at 42 Hz, at room temperature, and in the range 40-90% RH reduced 509 times,
while at 50 °C it reduced 48 times. The sensor exhibited quick response (5 s) and recovery time (16 s) when
it exposed to humidity change from 37% RH to 90% RH, and relatively low hysteresis of 3.2% observed at
40% RH and at room temperature showing its promising capacity as a humidity sensor.",
publisher = "Societa ceramica italiana, Politecnico di Torino",
journal = "XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY",
title = "NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION",
number = "119-ABS 201",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2584"
}

Savic, S., Vojisavljević, K., Počuča-Nešić, M., Knezevic, N., Djokic, V., Ribić, V.,& Branković, G.. (2019). NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION. in XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY
Societa ceramica italiana.(119-ABS 201).
https://hdl.handle.net/21.15107/rcub_rimsi_2584

Savic S, Vojisavljević K, Počuča-Nešić M, Knezevic N, Djokic V, Ribić V, Branković G. NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION. in XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY. 2019;(119-ABS 201).
https://hdl.handle.net/21.15107/rcub_rimsi_2584 .

Savic, Slavica, Vojisavljević, Katarina, Počuča-Nešić, Milica, Knezevic, Nikola, Djokic, Veljko, Ribić, Vesna, Branković, Goran, "NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION" in XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY, no. 119-ABS 201 (2019),
https://hdl.handle.net/21.15107/rcub_rimsi_2584 .