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 .