TY  - JOUR
AU  - Malešević, Aleksandar
AU  - Radojković, Aleksandar
AU  - Žunić, Milan
AU  - Dapčević, Aleksandra
AU  - Perać, Sanja
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1545
AB  - The properties of BaCe1-xInxO3-delta (x = 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, and 0.40) as proton conducting electrolyte are examined. The dense electrolyte is formed after sintering at 1300 degrees C for 5 h in air. The samples with In content > 25 mol% contain In2O3 as a secondary phase. The highest total conductivity is around 5x10(-3) S/cm for BaCe0.75In0.25O3-delta in the wet hydrogen atmosphere at 700 degrees C. After exposure to pure CO2 atmosphere at 700 degrees C for 5 h, the concentrations of at least 15 mol% In can completely suppress degradation of the electrolyte. The power density of Ni-BaCe0.75In0.25O3-delta/BaCe0.75In0.25O3-delta/LSCF-BaCe0.75In0.25O3-delta fuel cell tested in wet hydrogen atmosphere reaches 264 mW/cm(2) at 700 degrees C. This result is an indication of stability and functionality of this electrolyte and its versatility in respect to type of fuel and performing environment.
PB  - Springer, New York
T2  - Journal of Advanced Ceramics
T1  - Evaluation of stability and functionality of BaCe1-xInxO3-delta electrolyte in a wider range of indium concentration
EP  - 453
IS  - 3
SP  - 443
VL  - 11
DO  - 10.1007/s40145-021-0547-1
ER  - 

@article{
author = "Malešević, Aleksandar and Radojković, Aleksandar and Žunić, Milan and Dapčević, Aleksandra and Perać, Sanja and Branković, Zorica and Branković, Goran",
year = "2022",
abstract = "The properties of BaCe1-xInxO3-delta (x = 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, and 0.40) as proton conducting electrolyte are examined. The dense electrolyte is formed after sintering at 1300 degrees C for 5 h in air. The samples with In content > 25 mol% contain In2O3 as a secondary phase. The highest total conductivity is around 5x10(-3) S/cm for BaCe0.75In0.25O3-delta in the wet hydrogen atmosphere at 700 degrees C. After exposure to pure CO2 atmosphere at 700 degrees C for 5 h, the concentrations of at least 15 mol% In can completely suppress degradation of the electrolyte. The power density of Ni-BaCe0.75In0.25O3-delta/BaCe0.75In0.25O3-delta/LSCF-BaCe0.75In0.25O3-delta fuel cell tested in wet hydrogen atmosphere reaches 264 mW/cm(2) at 700 degrees C. This result is an indication of stability and functionality of this electrolyte and its versatility in respect to type of fuel and performing environment.",
publisher = "Springer, New York",
journal = "Journal of Advanced Ceramics",
title = "Evaluation of stability and functionality of BaCe1-xInxO3-delta electrolyte in a wider range of indium concentration",
pages = "453-443",
number = "3",
volume = "11",
doi = "10.1007/s40145-021-0547-1"
}

Malešević, A., Radojković, A., Žunić, M., Dapčević, A., Perać, S., Branković, Z.,& Branković, G.. (2022). Evaluation of stability and functionality of BaCe1-xInxO3-delta electrolyte in a wider range of indium concentration. in Journal of Advanced Ceramics
Springer, New York., 11(3), 443-453.
https://doi.org/10.1007/s40145-021-0547-1

Malešević A, Radojković A, Žunić M, Dapčević A, Perać S, Branković Z, Branković G. Evaluation of stability and functionality of BaCe1-xInxO3-delta electrolyte in a wider range of indium concentration. in Journal of Advanced Ceramics. 2022;11(3):443-453.
doi:10.1007/s40145-021-0547-1 .

Malešević, Aleksandar, Radojković, Aleksandar, Žunić, Milan, Dapčević, Aleksandra, Perać, Sanja, Branković, Zorica, Branković, Goran, "Evaluation of stability and functionality of BaCe1-xInxO3-delta electrolyte in a wider range of indium concentration" in Journal of Advanced Ceramics, 11, no. 3 (2022):443-453,
https://doi.org/10.1007/s40145-021-0547-1 . .

TY  - JOUR
AU  - Tasić, Nikola
AU  - Ćirković, Jovana
AU  - Ribić, Vesna
AU  - Žunić, Milan
AU  - Dapčević, Aleksandra
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1517
AB  - We present the synthesis and photocatalytic properties of mixed-phase TiO2 nanoparticles decorated with silver nanodots obtained by environmental-friendly wet chemical method using low molecular weight chitosan as the silver reducing agent. Structural analysis of synthesized Ag nanoparticles revealed that they crystallized in a rare hexagonal modification. High-resolution transmission electron microscopy study shows that  lt 3-nm hexagonal-Ag nanoparticles are implanted on the surface of  lt 20-nm anatase grains. Compared to Ag-free TiO2 powders, implantation with Ag results in important increase in visible light absorption. The photocatalytic activity of the samples was measured by monitoring decolorization of concentrated textile dye solution (50 mg L-1 of Reactive Orange 16) under simulated solar irradiation of 280 W m(-2). The optimum photocatalytic properties are achieved with 5 wt% of silver. Based on the collected results, the operating mechanism of the degradation process is suggested, and the effects of the silver addition are explained.
PB  - Wiley, Hoboken
T2  - Journal of the American Ceramic Society
T1  - Effects of the silver nanodots on the photocatalytic activity of mixed-phase TiO2
EP  - 347
IS  - 1
SP  - 336
VL  - 105
DO  - 10.1111/jace.18059
ER  - 

@article{
author = "Tasić, Nikola and Ćirković, Jovana and Ribić, Vesna and Žunić, Milan and Dapčević, Aleksandra and Branković, Goran and Branković, Zorica",
year = "2022",
abstract = "We present the synthesis and photocatalytic properties of mixed-phase TiO2 nanoparticles decorated with silver nanodots obtained by environmental-friendly wet chemical method using low molecular weight chitosan as the silver reducing agent. Structural analysis of synthesized Ag nanoparticles revealed that they crystallized in a rare hexagonal modification. High-resolution transmission electron microscopy study shows that  lt 3-nm hexagonal-Ag nanoparticles are implanted on the surface of  lt 20-nm anatase grains. Compared to Ag-free TiO2 powders, implantation with Ag results in important increase in visible light absorption. The photocatalytic activity of the samples was measured by monitoring decolorization of concentrated textile dye solution (50 mg L-1 of Reactive Orange 16) under simulated solar irradiation of 280 W m(-2). The optimum photocatalytic properties are achieved with 5 wt% of silver. Based on the collected results, the operating mechanism of the degradation process is suggested, and the effects of the silver addition are explained.",
publisher = "Wiley, Hoboken",
journal = "Journal of the American Ceramic Society",
title = "Effects of the silver nanodots on the photocatalytic activity of mixed-phase TiO2",
pages = "347-336",
number = "1",
volume = "105",
doi = "10.1111/jace.18059"
}

Tasić, N., Ćirković, J., Ribić, V., Žunić, M., Dapčević, A., Branković, G.,& Branković, Z.. (2022). Effects of the silver nanodots on the photocatalytic activity of mixed-phase TiO2. in Journal of the American Ceramic Society
Wiley, Hoboken., 105(1), 336-347.
https://doi.org/10.1111/jace.18059

Tasić N, Ćirković J, Ribić V, Žunić M, Dapčević A, Branković G, Branković Z. Effects of the silver nanodots on the photocatalytic activity of mixed-phase TiO2. in Journal of the American Ceramic Society. 2022;105(1):336-347.
doi:10.1111/jace.18059 .

Tasić, Nikola, Ćirković, Jovana, Ribić, Vesna, Žunić, Milan, Dapčević, Aleksandra, Branković, Goran, Branković, Zorica, "Effects of the silver nanodots on the photocatalytic activity of mixed-phase TiO2" in Journal of the American Ceramic Society, 105, no. 1 (2022):336-347,
https://doi.org/10.1111/jace.18059 . .

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  - 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  - 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  - JOUR
AU  - Luković Golić, Danijela
AU  - Radojković, Aleksandar
AU  - Dapčević, Aleksandra
AU  - Pajić, Damir
AU  - Dragović, Jure
AU  - Toric, Filip
AU  - Ćirković, Jovana
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1199
AB  - Bismuth ferrite, BiFeO3, was doped with a wide range of concentrations (0-30%) of Gd in order to investigate structural, ferroelectric, and magnetic properties and their correlation. Powder samples of Bi1-xGdxFeO3 (x = 0.00-0.30) were prepared using the hydro-evaporation synthesis method. Sintering process at 870 degrees C for 6 h of as-prepared, Gd doped BiFeO3 powders resulted in ceramic samples with relative densities in the range of (74-86) %. XRD analysis revealed that Bi1-xGdxFeO3 samples (x = 0.00-0.09) crystallized in rhombohedral phase; Bi1-xGdxFeO3 samples (x = 0.10-0.20) contained both rhombohedral and orthorhombic phases, while Bi1-xGdxFeO3 (x = 0.30) sample contained only the orthorhombic phase. The structural parameters obtained after Rietveld refinement for single-phase Bi1-xGdxFeO3 ceramic samples and microstructure image analysis were correlated with the results of ferroelectric and magnetic measurements. Bi1-xGdxFeO3 (x = 0.0625, 0.075, 0.09) samples showed improved ferroelectric properties and reduced leakage current density in comparison with undoped BiFeO3. Gradual increase in Gd content in BiFeO3 led to enhanced magnetic responses and weak ferromagnetic behavior.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium
EP  - 19165
IS  - 15
SP  - 19158
VL  - 45
DO  - 10.1016/j.ceramint.2019.06.162
ER  - 

@article{
author = "Luković Golić, Danijela and Radojković, Aleksandar and Dapčević, Aleksandra and Pajić, Damir and Dragović, Jure and Toric, Filip and Ćirković, Jovana and Branković, Goran and Branković, Zorica",
year = "2019",
abstract = "Bismuth ferrite, BiFeO3, was doped with a wide range of concentrations (0-30%) of Gd in order to investigate structural, ferroelectric, and magnetic properties and their correlation. Powder samples of Bi1-xGdxFeO3 (x = 0.00-0.30) were prepared using the hydro-evaporation synthesis method. Sintering process at 870 degrees C for 6 h of as-prepared, Gd doped BiFeO3 powders resulted in ceramic samples with relative densities in the range of (74-86) %. XRD analysis revealed that Bi1-xGdxFeO3 samples (x = 0.00-0.09) crystallized in rhombohedral phase; Bi1-xGdxFeO3 samples (x = 0.10-0.20) contained both rhombohedral and orthorhombic phases, while Bi1-xGdxFeO3 (x = 0.30) sample contained only the orthorhombic phase. The structural parameters obtained after Rietveld refinement for single-phase Bi1-xGdxFeO3 ceramic samples and microstructure image analysis were correlated with the results of ferroelectric and magnetic measurements. Bi1-xGdxFeO3 (x = 0.0625, 0.075, 0.09) samples showed improved ferroelectric properties and reduced leakage current density in comparison with undoped BiFeO3. Gradual increase in Gd content in BiFeO3 led to enhanced magnetic responses and weak ferromagnetic behavior.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium",
pages = "19165-19158",
number = "15",
volume = "45",
doi = "10.1016/j.ceramint.2019.06.162"
}

Luković Golić, D., Radojković, A., Dapčević, A., Pajić, D., Dragović, J., Toric, F., Ćirković, J., Branković, G.,& Branković, Z.. (2019). Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium. in Ceramics International
Elsevier Sci Ltd, Oxford., 45(15), 19158-19165.
https://doi.org/10.1016/j.ceramint.2019.06.162

Luković Golić D, Radojković A, Dapčević A, Pajić D, Dragović J, Toric F, Ćirković J, Branković G, Branković Z. Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium. in Ceramics International. 2019;45(15):19158-19165.
doi:10.1016/j.ceramint.2019.06.162 .

Luković Golić, Danijela, Radojković, Aleksandar, Dapčević, Aleksandra, Pajić, Damir, Dragović, Jure, Toric, Filip, Ćirković, Jovana, Branković, Goran, Branković, Zorica, "Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium" in Ceramics International, 45, no. 15 (2019):19158-19165,
https://doi.org/10.1016/j.ceramint.2019.06.162 . .

TY  - JOUR
AU  - Simović, Bojana
AU  - Dapčević, Aleksandra
AU  - Zdravković, Jelena
AU  - Tasić, Nikola
AU  - Kovac, Sabina
AU  - Krstic, Jugoslav
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1283
AB  - In this work, nine products were prepared by modifying the experimental conditions (6, 12 and 18 hat 110, 135 and 160 degrees C) of hydrothermal treatment of starting nanoanatase in significantly less concentrated alkaline medium than usual in order to obtain a pure titanate phase. The nanocrystalline samples were characterized by XRPD, FESEM, HRTEM/SAED, EDS, TG, FT-IR, UV-Vis and BET analyses. The results revealed that the structure, texture, morphology and band gap energy of samples strongly depend on conditions of hydrothermal treatment. The intensification of hydrothermal treatment significantly increases the solubility of TiO2 promoting the changes in morphology from nearly spherical titania nanoparticles to elongated titanate nanosheets. The single titanate phase was obtained after energetically the most intensive treatment, i.e. 18 hat 160 degrees C. The step-by-step optimization was thus necessary to finally distinguish the titanates from titania in terms of structural and spectral properties and to finally allow the clarification of long-standing confusion between titania and titanates. The obtained single titanate phase was furtherly used to fabricate a humidity sensor, which showed remarkably rapid response and quick recovery time.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions
EP  - 819
SP  - 810
VL  - 781
DO  - 10.1016/j.jallcom.2018.12.039
ER  - 

@article{
author = "Simović, Bojana and Dapčević, Aleksandra and Zdravković, Jelena and Tasić, Nikola and Kovac, Sabina and Krstic, Jugoslav and Branković, Goran",
year = "2019",
abstract = "In this work, nine products were prepared by modifying the experimental conditions (6, 12 and 18 hat 110, 135 and 160 degrees C) of hydrothermal treatment of starting nanoanatase in significantly less concentrated alkaline medium than usual in order to obtain a pure titanate phase. The nanocrystalline samples were characterized by XRPD, FESEM, HRTEM/SAED, EDS, TG, FT-IR, UV-Vis and BET analyses. The results revealed that the structure, texture, morphology and band gap energy of samples strongly depend on conditions of hydrothermal treatment. The intensification of hydrothermal treatment significantly increases the solubility of TiO2 promoting the changes in morphology from nearly spherical titania nanoparticles to elongated titanate nanosheets. The single titanate phase was obtained after energetically the most intensive treatment, i.e. 18 hat 160 degrees C. The step-by-step optimization was thus necessary to finally distinguish the titanates from titania in terms of structural and spectral properties and to finally allow the clarification of long-standing confusion between titania and titanates. The obtained single titanate phase was furtherly used to fabricate a humidity sensor, which showed remarkably rapid response and quick recovery time.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions",
pages = "819-810",
volume = "781",
doi = "10.1016/j.jallcom.2018.12.039"
}

Simović, B., Dapčević, A., Zdravković, J., Tasić, N., Kovac, S., Krstic, J.,& Branković, G.. (2019). From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 781, 810-819.
https://doi.org/10.1016/j.jallcom.2018.12.039

Simović B, Dapčević A, Zdravković J, Tasić N, Kovac S, Krstic J, Branković G. From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions. in Journal of Alloys and Compounds. 2019;781:810-819.
doi:10.1016/j.jallcom.2018.12.039 .

Simović, Bojana, Dapčević, Aleksandra, Zdravković, Jelena, Tasić, Nikola, Kovac, Sabina, Krstic, Jugoslav, Branković, Goran, "From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions" in Journal of Alloys and Compounds, 781 (2019):810-819,
https://doi.org/10.1016/j.jallcom.2018.12.039 . .

TY  - JOUR
AU  - Radojković, Aleksandar
AU  - Luković Golić, Danijela
AU  - Ćirković, Jovana
AU  - Marinković Stanojević, Zorica
AU  - Pajić, Damir
AU  - Toric, Filip
AU  - Dapčević, Aleksandra
AU  - Vulić, Predrag
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1162
AB  - Bulk ceramic samples of BiFeO3 were light doped (up to 1%) with Nb5+ in the place of Fe3+ (B-site doping) and their multiferroic properties were investigated using XRD, SEM, polarization (PMTS) and magnetization (SQUID) techniques. It is shown that even the small percentages of doping can notably change electric and magnetic behavior. Electric conductivity differs by two orders of magnitude between samples doped with 0.2% and 1% Nb. The ferroelectric behavior strongly depended on conduction mechanism, and transition from space-charge-limited current (SCLC) conduction to trap-filled limited (TFL) conduction regime reflected on a change in hysteresis patterns, particularly for the samples with 0.2% and 0.5% Nb. Separation of ZFC-FC magnetization curves occurred for all Nb concentrations and increased with Nb doping. Weak ferromagnetic behavior and the increase of remnant magnetization with Nb concentration was observed from the hysteresis measurements. Coercive field changed drastically compared to the pure BiFeO3, namely, the sample with 1% Nb exhibited very high coercive magnetic field of 10 kOe.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Tuning of BiFeO3 multiferroic properties by light doping with Nb
EP  - 16744
IS  - 14
SP  - 16739
VL  - 44
DO  - 10.1016/j.ceramint.2018.06.103
ER  - 

@article{
author = "Radojković, Aleksandar and Luković Golić, Danijela and Ćirković, Jovana and Marinković Stanojević, Zorica and Pajić, Damir and Toric, Filip and Dapčević, Aleksandra and Vulić, Predrag and Branković, Zorica and Branković, Goran",
year = "2018",
abstract = "Bulk ceramic samples of BiFeO3 were light doped (up to 1%) with Nb5+ in the place of Fe3+ (B-site doping) and their multiferroic properties were investigated using XRD, SEM, polarization (PMTS) and magnetization (SQUID) techniques. It is shown that even the small percentages of doping can notably change electric and magnetic behavior. Electric conductivity differs by two orders of magnitude between samples doped with 0.2% and 1% Nb. The ferroelectric behavior strongly depended on conduction mechanism, and transition from space-charge-limited current (SCLC) conduction to trap-filled limited (TFL) conduction regime reflected on a change in hysteresis patterns, particularly for the samples with 0.2% and 0.5% Nb. Separation of ZFC-FC magnetization curves occurred for all Nb concentrations and increased with Nb doping. Weak ferromagnetic behavior and the increase of remnant magnetization with Nb concentration was observed from the hysteresis measurements. Coercive field changed drastically compared to the pure BiFeO3, namely, the sample with 1% Nb exhibited very high coercive magnetic field of 10 kOe.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Tuning of BiFeO3 multiferroic properties by light doping with Nb",
pages = "16744-16739",
number = "14",
volume = "44",
doi = "10.1016/j.ceramint.2018.06.103"
}

Radojković, A., Luković Golić, D., Ćirković, J., Marinković Stanojević, Z., Pajić, D., Toric, F., Dapčević, A., Vulić, P., Branković, Z.,& Branković, G.. (2018). Tuning of BiFeO3 multiferroic properties by light doping with Nb. in Ceramics International
Elsevier Sci Ltd, Oxford., 44(14), 16739-16744.
https://doi.org/10.1016/j.ceramint.2018.06.103

Radojković A, Luković Golić D, Ćirković J, Marinković Stanojević Z, Pajić D, Toric F, Dapčević A, Vulić P, Branković Z, Branković G. Tuning of BiFeO3 multiferroic properties by light doping with Nb. in Ceramics International. 2018;44(14):16739-16744.
doi:10.1016/j.ceramint.2018.06.103 .

Radojković, Aleksandar, Luković Golić, Danijela, Ćirković, Jovana, Marinković Stanojević, Zorica, Pajić, Damir, Toric, Filip, Dapčević, Aleksandra, Vulić, Predrag, Branković, Zorica, Branković, Goran, "Tuning of BiFeO3 multiferroic properties by light doping with Nb" in Ceramics International, 44, no. 14 (2018):16739-16744,
https://doi.org/10.1016/j.ceramint.2018.06.103 . .

TY  - JOUR
AU  - Luković Golić, Danijela
AU  - Radojković, Aleksandar
AU  - Ćirković, Jovana
AU  - Dapčević, Aleksandra
AU  - Pajić, Damir
AU  - Tasić, Nikola
AU  - Savić, Slavica M.
AU  - Počuča-Nešić, Milica
AU  - Marković, Smilja
AU  - Branković, Goran
AU  - Marinković Stanojević, Zorica
AU  - Branković, Zorica
PY  - 2016
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1017
AB  - BiFeO3 powders were synthesized by sonochemically assisted hydrothermal and hydro-evaporation methods. The X-ray diffraction confirmed the presence of secondary phases, Bi25FeO39 and Bi2Fe4O9, in as prepared BiFeO3 powders. Optimization of sintering conditions indicated that temperature of 800 degrees C and time of 2 h after pressing at 9 t/cm(2) provided ceramics samples with"the highest density (up to 96% of theoretical density) and the lowest content of secondary phases. Ferroelectric and magnetic characterization was performed on two selected ceramics samples with the highest densities. Ceramics obtained from the powder synthesized by the hydrothermal method showed greater lattice distortion along [1 1 1] axis and smaller grains, which resulted in larger values of electric polarization at room temperature. It also exhibited less Fe(3d)-O(2p) orbital overlapping due to a larger Fe-O-Fe bond angle, causing lower antiferromagnetic ordering and weak ferromagnetic behavior at low temperatures.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of the European Ceramic Society
T1  - Structural, ferroelectric and magnetic properties of BiFeO3 synthesized by sonochemically assisted hydrothermal and hydro-evaporation chemical methods
EP  - 1631
IS  - 7
SP  - 1623
VL  - 36
DO  - 10.1016/j.jeurceramsoc.2016.01.031
ER  - 

@article{
author = "Luković Golić, Danijela and Radojković, Aleksandar and Ćirković, Jovana and Dapčević, Aleksandra and Pajić, Damir and Tasić, Nikola and Savić, Slavica M. and Počuča-Nešić, Milica and Marković, Smilja and Branković, Goran and Marinković Stanojević, Zorica and Branković, Zorica",
year = "2016",
abstract = "BiFeO3 powders were synthesized by sonochemically assisted hydrothermal and hydro-evaporation methods. The X-ray diffraction confirmed the presence of secondary phases, Bi25FeO39 and Bi2Fe4O9, in as prepared BiFeO3 powders. Optimization of sintering conditions indicated that temperature of 800 degrees C and time of 2 h after pressing at 9 t/cm(2) provided ceramics samples with"the highest density (up to 96% of theoretical density) and the lowest content of secondary phases. Ferroelectric and magnetic characterization was performed on two selected ceramics samples with the highest densities. Ceramics obtained from the powder synthesized by the hydrothermal method showed greater lattice distortion along [1 1 1] axis and smaller grains, which resulted in larger values of electric polarization at room temperature. It also exhibited less Fe(3d)-O(2p) orbital overlapping due to a larger Fe-O-Fe bond angle, causing lower antiferromagnetic ordering and weak ferromagnetic behavior at low temperatures.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of the European Ceramic Society",
title = "Structural, ferroelectric and magnetic properties of BiFeO3 synthesized by sonochemically assisted hydrothermal and hydro-evaporation chemical methods",
pages = "1631-1623",
number = "7",
volume = "36",
doi = "10.1016/j.jeurceramsoc.2016.01.031"
}

Luković Golić, D., Radojković, A., Ćirković, J., Dapčević, A., Pajić, D., Tasić, N., Savić, S. M., Počuča-Nešić, M., Marković, S., Branković, G., Marinković Stanojević, Z.,& Branković, Z.. (2016). Structural, ferroelectric and magnetic properties of BiFeO3 synthesized by sonochemically assisted hydrothermal and hydro-evaporation chemical methods. in Journal of the European Ceramic Society
Elsevier Sci Ltd, Oxford., 36(7), 1623-1631.
https://doi.org/10.1016/j.jeurceramsoc.2016.01.031

Luković Golić D, Radojković A, Ćirković J, Dapčević A, Pajić D, Tasić N, Savić SM, Počuča-Nešić M, Marković S, Branković G, Marinković Stanojević Z, Branković Z. Structural, ferroelectric and magnetic properties of BiFeO3 synthesized by sonochemically assisted hydrothermal and hydro-evaporation chemical methods. in Journal of the European Ceramic Society. 2016;36(7):1623-1631.
doi:10.1016/j.jeurceramsoc.2016.01.031 .

Luković Golić, Danijela, Radojković, Aleksandar, Ćirković, Jovana, Dapčević, Aleksandra, Pajić, Damir, Tasić, Nikola, Savić, Slavica M., Počuča-Nešić, Milica, Marković, Smilja, Branković, Goran, Marinković Stanojević, Zorica, Branković, Zorica, "Structural, ferroelectric and magnetic properties of BiFeO3 synthesized by sonochemically assisted hydrothermal and hydro-evaporation chemical methods" in Journal of the European Ceramic Society, 36, no. 7 (2016):1623-1631,
https://doi.org/10.1016/j.jeurceramsoc.2016.01.031 . .

TY  - JOUR
AU  - Savić, Slavica M.
AU  - Stojanović, Goran M
AU  - Vasiljević, D.
AU  - Vojisavljević, Katarina
AU  - Dapčević, Aleksandra
AU  - Radojković, Aleksandar
AU  - Perać, Sanja
AU  - Branković, Goran
PY  - 2016
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1001
AB  - The chemical synthesis of nickel manganite powder was performed by a complex polymerization method (CPM). The obtained fine nanoscaled powders were uniaxially pressed and sintered at different temperatures: 1000-1200 degrees C for 2 h, and different atmospheres: air and oxygen. The highest density was obtained for the sample sintered at 1200 degrees C in oxygen atmosphere. The energy for direct band gap transition (Eg) calculated from the Tauc plot decreases from 1.51 to 1.40 eV with the increase of the sintering temperature. Indentation experiments were carried out using a three-sided pyramidal (Berkovich) diamond tip, and Young's modulus of elasticity and hardness of NTC (negative temperature coefficient) ceramics at various indentation depths were calculated. The highest hardness (0.754 GPa) and elastic modulus (16.888 GPa) are exhibited by the ceramics sintered at highest temperature in oxygen atmosphere.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Nanoindentation study of nickel manganite ceramics obtained by a complex polymerization method
EP  - 12282
IS  - 10
SP  - 12276
VL  - 42
DO  - 10.1016/j.ceramint.2016.04.174
ER  - 

@article{
author = "Savić, Slavica M. and Stojanović, Goran M and Vasiljević, D. and Vojisavljević, Katarina and Dapčević, Aleksandra and Radojković, Aleksandar and Perać, Sanja and Branković, Goran",
year = "2016",
abstract = "The chemical synthesis of nickel manganite powder was performed by a complex polymerization method (CPM). The obtained fine nanoscaled powders were uniaxially pressed and sintered at different temperatures: 1000-1200 degrees C for 2 h, and different atmospheres: air and oxygen. The highest density was obtained for the sample sintered at 1200 degrees C in oxygen atmosphere. The energy for direct band gap transition (Eg) calculated from the Tauc plot decreases from 1.51 to 1.40 eV with the increase of the sintering temperature. Indentation experiments were carried out using a three-sided pyramidal (Berkovich) diamond tip, and Young's modulus of elasticity and hardness of NTC (negative temperature coefficient) ceramics at various indentation depths were calculated. The highest hardness (0.754 GPa) and elastic modulus (16.888 GPa) are exhibited by the ceramics sintered at highest temperature in oxygen atmosphere.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Nanoindentation study of nickel manganite ceramics obtained by a complex polymerization method",
pages = "12282-12276",
number = "10",
volume = "42",
doi = "10.1016/j.ceramint.2016.04.174"
}

Savić, S. M., Stojanović, G. M., Vasiljević, D., Vojisavljević, K., Dapčević, A., Radojković, A., Perać, S.,& Branković, G.. (2016). Nanoindentation study of nickel manganite ceramics obtained by a complex polymerization method. in Ceramics International
Elsevier Sci Ltd, Oxford., 42(10), 12276-12282.
https://doi.org/10.1016/j.ceramint.2016.04.174

Savić SM, Stojanović GM, Vasiljević D, Vojisavljević K, Dapčević A, Radojković A, Perać S, Branković G. Nanoindentation study of nickel manganite ceramics obtained by a complex polymerization method. in Ceramics International. 2016;42(10):12276-12282.
doi:10.1016/j.ceramint.2016.04.174 .

Savić, Slavica M., Stojanović, Goran M, Vasiljević, D., Vojisavljević, Katarina, Dapčević, Aleksandra, Radojković, Aleksandar, Perać, Sanja, Branković, Goran, "Nanoindentation study of nickel manganite ceramics obtained by a complex polymerization method" in Ceramics International, 42, no. 10 (2016):12276-12282,
https://doi.org/10.1016/j.ceramint.2016.04.174 . .

TY  - JOUR
AU  - Perać, Sanja
AU  - Savić, Slavica M.
AU  - Branković, Zorica
AU  - Vrtnik, Stanislav
AU  - Dapčević, Aleksandra
AU  - Branković, Goran
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/861
AB  - In the last decade, the sodium cobaltite ceramic became a promising candidate for potential thermoelectric applications, because of its large thermopower and low resistivity. In this work, polycrystalline samples of NaCo(2-x)CuxO(4) (x = 0, 0.01, 0.03, 0.05) were prepared using mechanochemically assisted solid-state reaction method (MASSR) and the citric acid complex method (CAC). Bulk samples were prepared by pressing into disc-shaped pellets and subsequently subjected to a thermal treatment at 880 degrees C in inert argon atmosphere. Changes in structural and microstructural characteristics of the samples, caused by the substitution of Cu for Co, were characterized using X-ray diffraction (XRD) analysis, and scanning electron microscopy (SEM), respectively. The results of inductively coupled plasma (ICP) analysis showed that the compositions of the final products correspond to gamma-NaCo2O4 and confirmed that desired compound was obtained in both syntheses procedures. The advantages and disadvantages of these two syntheses procedures have been observed and discussed: the CAC method enabled obtaining samples with higher density and fine microstructure compared to the MASSR method, thus better thermoelectric properties. The Cu2+ substitution led to the increase in Seebeck coefficient in both synthesis routes. The highest figure of merit of 0.022 at 300 K was observed for the sample doped with 1 mol% Cu, obtained by the CAC method, and it was almost twice higher than in the undoped sample confirming the significant influence of Cu-doping with even small concentrations.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Mechanochemically assisted solid-state and citric acid complex syntheses of Cu-doped sodium cobaltite ceramics
EP  - 487
SP  - 480
VL  - 640
DO  - 10.1016/j.jallcom.2015.04.003
ER  - 

@article{
author = "Perać, Sanja and Savić, Slavica M. and Branković, Zorica and Vrtnik, Stanislav and Dapčević, Aleksandra and Branković, Goran",
year = "2015",
abstract = "In the last decade, the sodium cobaltite ceramic became a promising candidate for potential thermoelectric applications, because of its large thermopower and low resistivity. In this work, polycrystalline samples of NaCo(2-x)CuxO(4) (x = 0, 0.01, 0.03, 0.05) were prepared using mechanochemically assisted solid-state reaction method (MASSR) and the citric acid complex method (CAC). Bulk samples were prepared by pressing into disc-shaped pellets and subsequently subjected to a thermal treatment at 880 degrees C in inert argon atmosphere. Changes in structural and microstructural characteristics of the samples, caused by the substitution of Cu for Co, were characterized using X-ray diffraction (XRD) analysis, and scanning electron microscopy (SEM), respectively. The results of inductively coupled plasma (ICP) analysis showed that the compositions of the final products correspond to gamma-NaCo2O4 and confirmed that desired compound was obtained in both syntheses procedures. The advantages and disadvantages of these two syntheses procedures have been observed and discussed: the CAC method enabled obtaining samples with higher density and fine microstructure compared to the MASSR method, thus better thermoelectric properties. The Cu2+ substitution led to the increase in Seebeck coefficient in both synthesis routes. The highest figure of merit of 0.022 at 300 K was observed for the sample doped with 1 mol% Cu, obtained by the CAC method, and it was almost twice higher than in the undoped sample confirming the significant influence of Cu-doping with even small concentrations.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Mechanochemically assisted solid-state and citric acid complex syntheses of Cu-doped sodium cobaltite ceramics",
pages = "487-480",
volume = "640",
doi = "10.1016/j.jallcom.2015.04.003"
}

Perać, S., Savić, S. M., Branković, Z., Vrtnik, S., Dapčević, A.,& Branković, G.. (2015). Mechanochemically assisted solid-state and citric acid complex syntheses of Cu-doped sodium cobaltite ceramics. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 640, 480-487.
https://doi.org/10.1016/j.jallcom.2015.04.003

Perać S, Savić SM, Branković Z, Vrtnik S, Dapčević A, Branković G. Mechanochemically assisted solid-state and citric acid complex syntheses of Cu-doped sodium cobaltite ceramics. in Journal of Alloys and Compounds. 2015;640:480-487.
doi:10.1016/j.jallcom.2015.04.003 .

Perać, Sanja, Savić, Slavica M., Branković, Zorica, Vrtnik, Stanislav, Dapčević, Aleksandra, Branković, Goran, "Mechanochemically assisted solid-state and citric acid complex syntheses of Cu-doped sodium cobaltite ceramics" in Journal of Alloys and Compounds, 640 (2015):480-487,
https://doi.org/10.1016/j.jallcom.2015.04.003 . .

TY  - JOUR
AU  - Dapčević, Aleksandra
AU  - Poleti, Dejan
AU  - Rogan, Jelena
AU  - Radojković, Aleksandar
AU  - Radović, M.
AU  - Branković, Goran
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/840
AB  - The possibility to stabilize the delta-Bi2O3-type polymorph with high ionic conductivity by doping with Tm2O3 was investigated in this study. Five microaystalline samples were synthesized at 750 degrees C from alpha-Bi2O3 and Tm2O3 mixtures with compositions (Bi1-xTmx)(2)O-3, where x = 0.04, 0.08, 0.11, 0.14 and 0.20. The XRD, SEM, HRTEM and SAED results showed that the targeted delta-Bi2O3-type single-phase (space group Fm (3) over barm) was formed for 0.11  lt = x  lt = 0.20. The unit cell parameter of delta-Bi2O3-type phase decreases with increase in Tm content. According to DTA, no phase transitions were observed in the sample with x = 020, indicating that the obtained delta-Bi2O3-type phase is structurally stable from room temperature to 985 degrees C. Based on EIS, (Bi0.80Tm0.20)(2)O-3 exhibits high conductivity (0.117 S cm(-1) at 550 degrees C) with activation energies: 0.38(4) eV above 550 degrees C and 127(2) eV below 550 degrees C, due to the change in charge carrier mobility. The effect of thermal aging was investigated and discussed.
PB  - Elsevier Science Bv, Amsterdam
T2  - Solid State Ionics
T1  - A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity
EP  - 23
SP  - 18
VL  - 280
DO  - 10.1016/j.ssi.2015.08.004
ER  - 

@article{
author = "Dapčević, Aleksandra and Poleti, Dejan and Rogan, Jelena and Radojković, Aleksandar and Radović, M. and Branković, Goran",
year = "2015",
abstract = "The possibility to stabilize the delta-Bi2O3-type polymorph with high ionic conductivity by doping with Tm2O3 was investigated in this study. Five microaystalline samples were synthesized at 750 degrees C from alpha-Bi2O3 and Tm2O3 mixtures with compositions (Bi1-xTmx)(2)O-3, where x = 0.04, 0.08, 0.11, 0.14 and 0.20. The XRD, SEM, HRTEM and SAED results showed that the targeted delta-Bi2O3-type single-phase (space group Fm (3) over barm) was formed for 0.11  lt = x  lt = 0.20. The unit cell parameter of delta-Bi2O3-type phase decreases with increase in Tm content. According to DTA, no phase transitions were observed in the sample with x = 020, indicating that the obtained delta-Bi2O3-type phase is structurally stable from room temperature to 985 degrees C. Based on EIS, (Bi0.80Tm0.20)(2)O-3 exhibits high conductivity (0.117 S cm(-1) at 550 degrees C) with activation energies: 0.38(4) eV above 550 degrees C and 127(2) eV below 550 degrees C, due to the change in charge carrier mobility. The effect of thermal aging was investigated and discussed.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Solid State Ionics",
title = "A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity",
pages = "23-18",
volume = "280",
doi = "10.1016/j.ssi.2015.08.004"
}

Dapčević, A., Poleti, D., Rogan, J., Radojković, A., Radović, M.,& Branković, G.. (2015). A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity. in Solid State Ionics
Elsevier Science Bv, Amsterdam., 280, 18-23.
https://doi.org/10.1016/j.ssi.2015.08.004

Dapčević A, Poleti D, Rogan J, Radojković A, Radović M, Branković G. A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity. in Solid State Ionics. 2015;280:18-23.
doi:10.1016/j.ssi.2015.08.004 .

Dapčević, Aleksandra, Poleti, Dejan, Rogan, Jelena, Radojković, Aleksandar, Radović, M., Branković, Goran, "A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity" in Solid State Ionics, 280 (2015):18-23,
https://doi.org/10.1016/j.ssi.2015.08.004 . .