TY  - JOUR
AU  - Branković, Zorica
AU  - Branković, Goran
AU  - Počuča-Nešić, Milica
AU  - Marinković Stanojević, Zorica
AU  - Žunić, Milan
AU  - Luković Golić, Danijela
AU  - Tararam, R.
AU  - Cilense, Mario
AU  - Zaghete, M. A.
AU  - Jaglicic, Z.
AU  - Jagodic, M.
AU  - Varela, JA
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/881
AB  - In this work single phase hexagonal YMnO3 powders were prepared starting from Y(CH3COO)(3)center dot xH(2)O, Mn(CH3COO)(2)center dot 4H(2)O, KMnO4 and KOH using methods of conventional (280 degrees C for 6 h) or microwave assisted hydrothermal synthesis (200 degrees C for 2 h) followed by calcination at 1200 degrees C for 2 h. According to FESEM analysis the calcined powders consisted of submicronic YMnO3 particles, which were uniform in shape and size. Ceramic samples were obtained by sintering the as-synthesized powders at 1400 degrees C for 2 h. XRD analysis confirmed the presence of the single phase hexagonal YMnO3. SEM analysis showed a dense and homogeneous microstructure with typical inter- and intra-grain cracks. Magnetic measurements indicated ferrimagnetic properties that were explained by non-stoichiometry of the obtained compound and an excess of manganese that was confirmed by ICP analysis.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Hydrothermally assisted synthesis of YMnO3
EP  - 14298
IS  - 10
SP  - 14293
VL  - 41
DO  - 10.1016/j.ceramint.2015.07.060
ER  - 

@article{
author = "Branković, Zorica and Branković, Goran and Počuča-Nešić, Milica and Marinković Stanojević, Zorica and Žunić, Milan and Luković Golić, Danijela and Tararam, R. and Cilense, Mario and Zaghete, M. A. and Jaglicic, Z. and Jagodic, M. and Varela, JA",
year = "2015",
abstract = "In this work single phase hexagonal YMnO3 powders were prepared starting from Y(CH3COO)(3)center dot xH(2)O, Mn(CH3COO)(2)center dot 4H(2)O, KMnO4 and KOH using methods of conventional (280 degrees C for 6 h) or microwave assisted hydrothermal synthesis (200 degrees C for 2 h) followed by calcination at 1200 degrees C for 2 h. According to FESEM analysis the calcined powders consisted of submicronic YMnO3 particles, which were uniform in shape and size. Ceramic samples were obtained by sintering the as-synthesized powders at 1400 degrees C for 2 h. XRD analysis confirmed the presence of the single phase hexagonal YMnO3. SEM analysis showed a dense and homogeneous microstructure with typical inter- and intra-grain cracks. Magnetic measurements indicated ferrimagnetic properties that were explained by non-stoichiometry of the obtained compound and an excess of manganese that was confirmed by ICP analysis.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Hydrothermally assisted synthesis of YMnO3",
pages = "14298-14293",
number = "10",
volume = "41",
doi = "10.1016/j.ceramint.2015.07.060"
}

Branković, Z., Branković, G., Počuča-Nešić, M., Marinković Stanojević, Z., Žunić, M., Luković Golić, D., Tararam, R., Cilense, M., Zaghete, M. A., Jaglicic, Z., Jagodic, M.,& Varela, J.. (2015). Hydrothermally assisted synthesis of YMnO3. in Ceramics International
Elsevier Sci Ltd, Oxford., 41(10), 14293-14298.
https://doi.org/10.1016/j.ceramint.2015.07.060

Branković Z, Branković G, Počuča-Nešić M, Marinković Stanojević Z, Žunić M, Luković Golić D, Tararam R, Cilense M, Zaghete MA, Jaglicic Z, Jagodic M, Varela J. Hydrothermally assisted synthesis of YMnO3. in Ceramics International. 2015;41(10):14293-14298.
doi:10.1016/j.ceramint.2015.07.060 .

Branković, Zorica, Branković, Goran, Počuča-Nešić, Milica, Marinković Stanojević, Zorica, Žunić, Milan, Luković Golić, Danijela, Tararam, R., Cilense, Mario, Zaghete, M. A., Jaglicic, Z., Jagodic, M., Varela, JA, "Hydrothermally assisted synthesis of YMnO3" in Ceramics International, 41, no. 10 (2015):14293-14298,
https://doi.org/10.1016/j.ceramint.2015.07.060 . .

TY  - JOUR
AU  - Luković Golić, Danijela
AU  - Ćirković, Jovana
AU  - Šćepanović, Maja
AU  - Srećković, Tatjana
AU  - Longo, Elson
AU  - Varela, JA
AU  - Daneu, Nina
AU  - Stamenković, V.
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/757
AB  - Nano- (30-60 nm) and submicron (100-350 nm) ZnO particles were synthesized using solvothermal method at 200 degrees C from an ethanolic solution of zinc acetate dihydrate, applying different reaction conditions, i.e., pH value of precursor and time of the reaction. The X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance (DR), Raman spectroscopy, and photoluminescence (PL) spectroscopy have been employed for characterization of synthesized ZnO powders. It was shown that the structural, morphological, and optical properties are largely determined by reaction conditions during solvothermal synthesis. The particle crystallinity improves with the decrease of pH value and/or the increase of time of the reaction. The Raman and PL spectra analyses indicate that the oxygen interstitials are dominant intrinsic defects in solvothermally synthesized ZnO powders. It was observed that concentration of defects in wurtzite ZnO crystal lattices slightly changes with the variation of pH value of the precursor and time of the solvothermal reaction. The correlation between structural ordering and defect structure of particles and corresponding growth processes was discussed.
PB  - Springer, Dordrecht
T2  - Journal of Nanoparticle Research
T1  - The modification of structural and optical properties of nano- and submicron ZnO powders by variation of solvothermal syntheses conditions
IS  - 10
VL  - 16
DO  - 10.1007/s11051-014-2670-1
ER  - 

@article{
author = "Luković Golić, Danijela and Ćirković, Jovana and Šćepanović, Maja and Srećković, Tatjana and Longo, Elson and Varela, JA and Daneu, Nina and Stamenković, V. and Branković, Goran and Branković, Zorica",
year = "2014",
abstract = "Nano- (30-60 nm) and submicron (100-350 nm) ZnO particles were synthesized using solvothermal method at 200 degrees C from an ethanolic solution of zinc acetate dihydrate, applying different reaction conditions, i.e., pH value of precursor and time of the reaction. The X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance (DR), Raman spectroscopy, and photoluminescence (PL) spectroscopy have been employed for characterization of synthesized ZnO powders. It was shown that the structural, morphological, and optical properties are largely determined by reaction conditions during solvothermal synthesis. The particle crystallinity improves with the decrease of pH value and/or the increase of time of the reaction. The Raman and PL spectra analyses indicate that the oxygen interstitials are dominant intrinsic defects in solvothermally synthesized ZnO powders. It was observed that concentration of defects in wurtzite ZnO crystal lattices slightly changes with the variation of pH value of the precursor and time of the solvothermal reaction. The correlation between structural ordering and defect structure of particles and corresponding growth processes was discussed.",
publisher = "Springer, Dordrecht",
journal = "Journal of Nanoparticle Research",
title = "The modification of structural and optical properties of nano- and submicron ZnO powders by variation of solvothermal syntheses conditions",
number = "10",
volume = "16",
doi = "10.1007/s11051-014-2670-1"
}

Luković Golić, D., Ćirković, J., Šćepanović, M., Srećković, T., Longo, E., Varela, J., Daneu, N., Stamenković, V., Branković, G.,& Branković, Z.. (2014). The modification of structural and optical properties of nano- and submicron ZnO powders by variation of solvothermal syntheses conditions. in Journal of Nanoparticle Research
Springer, Dordrecht., 16(10).
https://doi.org/10.1007/s11051-014-2670-1

Luković Golić D, Ćirković J, Šćepanović M, Srećković T, Longo E, Varela J, Daneu N, Stamenković V, Branković G, Branković Z. The modification of structural and optical properties of nano- and submicron ZnO powders by variation of solvothermal syntheses conditions. in Journal of Nanoparticle Research. 2014;16(10).
doi:10.1007/s11051-014-2670-1 .

Luković Golić, Danijela, Ćirković, Jovana, Šćepanović, Maja, Srećković, Tatjana, Longo, Elson, Varela, JA, Daneu, Nina, Stamenković, V., Branković, Goran, Branković, Zorica, "The modification of structural and optical properties of nano- and submicron ZnO powders by variation of solvothermal syntheses conditions" in Journal of Nanoparticle Research, 16, no. 10 (2014),
https://doi.org/10.1007/s11051-014-2670-1 . .

TY  - JOUR
AU  - Žunić, Milan
AU  - Branković, Goran
AU  - Basoli, Francesco
AU  - Cilense, Mario
AU  - Longo, Elson
AU  - Varela, JA
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/813
AB  - There are many of properties of anodes based on proton conductors, like microstructure, conductivity and chemical stability, which should be optimized. In this work we were dealing with the influence of niobium on the chemical stability, microstructural and electrical characteristics of proton conducting NiO-BaCe0.85-xNbxY0.15O3-delta (NiO-BCNYx) anodes. Four anode substrates NiO-BCNYx of different Nb concentration were prepared using the method of evaporation and decomposition of solutions and suspensions (EDSS). Sintered anode substrates were reduced and their microstructural and electrical properties were examined before and after reduction as a function of the amount of niobium. Chemical stability tests showed strong influence of Nb amount on the chemical stability of anodes in the CO2. Microstructural properties of the anode pellets before and after testing in CO2 were investigated using X-ray diffraction analysis. Electrical properties of anode samples were examined by impedance spectroscopy measurements and the conductivity values of reduced anodes were more than 50 S cm (1) at 600 degrees C confirming percolation through Ni particles. Fuel cells were fabricated with aim to examine the functionality of anodes. During the fuel cell test the cell with Ni-BCNY10 anode achieved the highest performance, demonstrating a peak power density of 164 mW cm (2) at 650 degrees C, which confirmed the functionality of Ni-BCNY anodes.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Stability, characterization and functionality of proton conducting NiO-BaCe0.85-xNbxY0.15O3-delta cermet anodes for IT-SOFC application
EP  - 13
SP  - 7
VL  - 609
DO  - 10.1016/j.jallcom.2014.04.175
ER  - 

@article{
author = "Žunić, Milan and Branković, Goran and Basoli, Francesco and Cilense, Mario and Longo, Elson and Varela, JA",
year = "2014",
abstract = "There are many of properties of anodes based on proton conductors, like microstructure, conductivity and chemical stability, which should be optimized. In this work we were dealing with the influence of niobium on the chemical stability, microstructural and electrical characteristics of proton conducting NiO-BaCe0.85-xNbxY0.15O3-delta (NiO-BCNYx) anodes. Four anode substrates NiO-BCNYx of different Nb concentration were prepared using the method of evaporation and decomposition of solutions and suspensions (EDSS). Sintered anode substrates were reduced and their microstructural and electrical properties were examined before and after reduction as a function of the amount of niobium. Chemical stability tests showed strong influence of Nb amount on the chemical stability of anodes in the CO2. Microstructural properties of the anode pellets before and after testing in CO2 were investigated using X-ray diffraction analysis. Electrical properties of anode samples were examined by impedance spectroscopy measurements and the conductivity values of reduced anodes were more than 50 S cm (1) at 600 degrees C confirming percolation through Ni particles. Fuel cells were fabricated with aim to examine the functionality of anodes. During the fuel cell test the cell with Ni-BCNY10 anode achieved the highest performance, demonstrating a peak power density of 164 mW cm (2) at 650 degrees C, which confirmed the functionality of Ni-BCNY anodes.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Stability, characterization and functionality of proton conducting NiO-BaCe0.85-xNbxY0.15O3-delta cermet anodes for IT-SOFC application",
pages = "13-7",
volume = "609",
doi = "10.1016/j.jallcom.2014.04.175"
}

Žunić, M., Branković, G., Basoli, F., Cilense, M., Longo, E.,& Varela, J.. (2014). Stability, characterization and functionality of proton conducting NiO-BaCe0.85-xNbxY0.15O3-delta cermet anodes for IT-SOFC application. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 609, 7-13.
https://doi.org/10.1016/j.jallcom.2014.04.175

Žunić M, Branković G, Basoli F, Cilense M, Longo E, Varela J. Stability, characterization and functionality of proton conducting NiO-BaCe0.85-xNbxY0.15O3-delta cermet anodes for IT-SOFC application. in Journal of Alloys and Compounds. 2014;609:7-13.
doi:10.1016/j.jallcom.2014.04.175 .

Žunić, Milan, Branković, Goran, Basoli, Francesco, Cilense, Mario, Longo, Elson, Varela, JA, "Stability, characterization and functionality of proton conducting NiO-BaCe0.85-xNbxY0.15O3-delta cermet anodes for IT-SOFC application" in Journal of Alloys and Compounds, 609 (2014):7-13,
https://doi.org/10.1016/j.jallcom.2014.04.175 . .

TY  - JOUR
AU  - Počuča-Nešić, Milica
AU  - Marinković Stanojević, Zorica
AU  - Branković, Zorica
AU  - Cotic, P
AU  - Bernik, Slavko
AU  - Sousa, Goes M
AU  - Marinković, Bojan A
AU  - Varela, JA
AU  - Branković, Goran
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/737
AB  - Yttrium manganite (YMnO3) is a multiferroic material, which means that it exhibits both ferromagnetic and ferroelectric properties, so making it interesting for a variety of technological applications. In this work, single-phase YMnO3 was prepared for the first time by mechanochemical synthesis in a planetary ball mill. The YMnO3 was formed directly from the highly activated constituent oxides, Y2O3 and Mn2O3, after 60 min of milling time. During prolonged milling, the growth of the particles occurred. The cumulative energy introduced into the system during milling for 60 min was 86 kJ/g. The X-ray powder-diffraction analysis indicates that the as-prepared samples crystallize with an orthorhombic (Pnma) YMnO3 structure. The morphology and chemical composition of the powder were investigated by SEM and FESEM. The magnetic properties of the obtained YMnO3 powders were found to change as a function of the milling time in a manner consistent with the variation in the nanocomposite microstructure.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Mechanochemical synthesis of yttrium manganite
EP  - 456
SP  - 451
VL  - 552
DO  - 10.1016/j.jallcom.2012.11.031
ER  - 

@article{
author = "Počuča-Nešić, Milica and Marinković Stanojević, Zorica and Branković, Zorica and Cotic, P and Bernik, Slavko and Sousa, Goes M and Marinković, Bojan A and Varela, JA and Branković, Goran",
year = "2013",
abstract = "Yttrium manganite (YMnO3) is a multiferroic material, which means that it exhibits both ferromagnetic and ferroelectric properties, so making it interesting for a variety of technological applications. In this work, single-phase YMnO3 was prepared for the first time by mechanochemical synthesis in a planetary ball mill. The YMnO3 was formed directly from the highly activated constituent oxides, Y2O3 and Mn2O3, after 60 min of milling time. During prolonged milling, the growth of the particles occurred. The cumulative energy introduced into the system during milling for 60 min was 86 kJ/g. The X-ray powder-diffraction analysis indicates that the as-prepared samples crystallize with an orthorhombic (Pnma) YMnO3 structure. The morphology and chemical composition of the powder were investigated by SEM and FESEM. The magnetic properties of the obtained YMnO3 powders were found to change as a function of the milling time in a manner consistent with the variation in the nanocomposite microstructure.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Mechanochemical synthesis of yttrium manganite",
pages = "456-451",
volume = "552",
doi = "10.1016/j.jallcom.2012.11.031"
}

Počuča-Nešić, M., Marinković Stanojević, Z., Branković, Z., Cotic, P., Bernik, S., Sousa, G. M., Marinković, B. A., Varela, J.,& Branković, G.. (2013). Mechanochemical synthesis of yttrium manganite. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 552, 451-456.
https://doi.org/10.1016/j.jallcom.2012.11.031

Počuča-Nešić M, Marinković Stanojević Z, Branković Z, Cotic P, Bernik S, Sousa GM, Marinković BA, Varela J, Branković G. Mechanochemical synthesis of yttrium manganite. in Journal of Alloys and Compounds. 2013;552:451-456.
doi:10.1016/j.jallcom.2012.11.031 .

Počuča-Nešić, Milica, Marinković Stanojević, Zorica, Branković, Zorica, Cotic, P, Bernik, Slavko, Sousa, Goes M, Marinković, Bojan A, Varela, JA, Branković, Goran, "Mechanochemical synthesis of yttrium manganite" in Journal of Alloys and Compounds, 552 (2013):451-456,
https://doi.org/10.1016/j.jallcom.2012.11.031 . .

TY  - JOUR
AU  - Žunić, Milan
AU  - Branković, Goran
AU  - Foschini, Cesar Renato
AU  - Cilense, Mario
AU  - Longo, Elson
AU  - Varela, JA
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/712
AB  - Optimization of the major properties of anodes based on proton conductors, such as microstructure, conductivity and chemical stability, is yet to be achieved. In this study we investigated the influence of indium on the chemical stability, microstructural and electrical characteristics of proton conducting NiO-BaCe0.9 xInxY0.1O3 delta (NiO-BCIYx) anodes. Four compositions of cermet anode substrates NiO-BCIYx were prepared using the method of evaporation and decomposition of solutions and suspensions (EDSS). Sintered anode substrates were reduced and their microstructural and electrical properties were examined before and after reduction as a function of the amount of indium. Anode substrates tested on chemical stability in the CO2 atmosphere showed high stability compared to anode substrates based on commonly used doped barium cerates. Microstructural properties of the anode pellets before and after testing in CO2 were investigated using X-ray diffraction analysis. Impedance spectroscopy measurements were used for evaluation of electrical properties of the anode pellets and the conductivity values of reduced anodes of more than 14 S cm (1) at 600 degrees C confirmed percolations through Ni particles. Under fuel cell operating conditions, the cell with a Ni-BCIY20 anode achieved the highest performance, demonstrating a peak power density 223 mW/cm(2) at 700 degrees C confirming the functionality of Ni-BCIY anodes.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Influence of the indium concentration on microstructural and electrical properties of proton conducting NiO-BaCe0.9-xInxY0.1O3-delta cermet anodes for IT-SOFC application
EP  - 260
SP  - 254
VL  - 563
DO  - 10.1016/j.jallcom.2013.02.122
ER  - 

@article{
author = "Žunić, Milan and Branković, Goran and Foschini, Cesar Renato and Cilense, Mario and Longo, Elson and Varela, JA",
year = "2013",
abstract = "Optimization of the major properties of anodes based on proton conductors, such as microstructure, conductivity and chemical stability, is yet to be achieved. In this study we investigated the influence of indium on the chemical stability, microstructural and electrical characteristics of proton conducting NiO-BaCe0.9 xInxY0.1O3 delta (NiO-BCIYx) anodes. Four compositions of cermet anode substrates NiO-BCIYx were prepared using the method of evaporation and decomposition of solutions and suspensions (EDSS). Sintered anode substrates were reduced and their microstructural and electrical properties were examined before and after reduction as a function of the amount of indium. Anode substrates tested on chemical stability in the CO2 atmosphere showed high stability compared to anode substrates based on commonly used doped barium cerates. Microstructural properties of the anode pellets before and after testing in CO2 were investigated using X-ray diffraction analysis. Impedance spectroscopy measurements were used for evaluation of electrical properties of the anode pellets and the conductivity values of reduced anodes of more than 14 S cm (1) at 600 degrees C confirmed percolations through Ni particles. Under fuel cell operating conditions, the cell with a Ni-BCIY20 anode achieved the highest performance, demonstrating a peak power density 223 mW/cm(2) at 700 degrees C confirming the functionality of Ni-BCIY anodes.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Influence of the indium concentration on microstructural and electrical properties of proton conducting NiO-BaCe0.9-xInxY0.1O3-delta cermet anodes for IT-SOFC application",
pages = "260-254",
volume = "563",
doi = "10.1016/j.jallcom.2013.02.122"
}

Žunić, M., Branković, G., Foschini, C. R., Cilense, M., Longo, E.,& Varela, J.. (2013). Influence of the indium concentration on microstructural and electrical properties of proton conducting NiO-BaCe0.9-xInxY0.1O3-delta cermet anodes for IT-SOFC application. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 563, 254-260.
https://doi.org/10.1016/j.jallcom.2013.02.122

Žunić M, Branković G, Foschini CR, Cilense M, Longo E, Varela J. Influence of the indium concentration on microstructural and electrical properties of proton conducting NiO-BaCe0.9-xInxY0.1O3-delta cermet anodes for IT-SOFC application. in Journal of Alloys and Compounds. 2013;563:254-260.
doi:10.1016/j.jallcom.2013.02.122 .

Žunić, Milan, Branković, Goran, Foschini, Cesar Renato, Cilense, Mario, Longo, Elson, Varela, JA, "Influence of the indium concentration on microstructural and electrical properties of proton conducting NiO-BaCe0.9-xInxY0.1O3-delta cermet anodes for IT-SOFC application" in Journal of Alloys and Compounds, 563 (2013):254-260,
https://doi.org/10.1016/j.jallcom.2013.02.122 . .

TY  - JOUR
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - Sequinel, T
AU  - Žunić, Milan
AU  - Vuković, Marina
AU  - Tasić, Nikola
AU  - Marinković, Bojan A
AU  - Cilense, Mario
AU  - Varela, JA
AU  - Longo, Elson
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/674
AB  - Processing of the YMn2O5 powder is very challenging, since it decomposes to YMnO3 and Mn3O4 at temperatures close to 1180 degrees C, while samples consolidation commonly demands high temperatures. The main goal of this work is to investigate a possibility to prepare thick films of YMn2O5, since their deposition generally requires significantly lower temperatures. Multiferroic YMn2O5 was synthesized by the hydrothermal method from Y(CH3COO)(3) center dot xH(2)O, Mn(CH3COO)(2) center dot 4H(2)O and KMnO4 precursors. XRD, FE-SEM and TEM analysis showed that the obtained powder was monophasic, with orthorhombic crystal structure and columnar particle shape with mean diameter and length of around 20 and 50 nm, respectively. The obtained powder was suspended in isopropyl alcohol with addition of appropriate binder and deflocculant. This suspension was used for electrophoretic deposition of YMn2O5 thick films under the high-voltage conditions and electric fields ranging from 250 to 2125 V/cm. The films obtained at 1000 V/cm and higher electric fields showed good adhesion, particle packing, homogeneity and very low porosity. It was shown that the deposition in extremely high electric fields (K-C=2125 V/cm) can influence the crystal orientation of the films, resulting in formation of preferentially oriented films.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - High-voltage electrophoretic deposition of preferentially oriented films from multiferroic YMn2O5 nanopowders
EP  - 2068
IS  - 2
SP  - 2065
VL  - 39
DO  - 10.1016/j.ceramint.2012.08.060
ER  - 

@article{
author = "Branković, Goran and Branković, Zorica and Sequinel, T and Žunić, Milan and Vuković, Marina and Tasić, Nikola and Marinković, Bojan A and Cilense, Mario and Varela, JA and Longo, Elson",
year = "2013",
abstract = "Processing of the YMn2O5 powder is very challenging, since it decomposes to YMnO3 and Mn3O4 at temperatures close to 1180 degrees C, while samples consolidation commonly demands high temperatures. The main goal of this work is to investigate a possibility to prepare thick films of YMn2O5, since their deposition generally requires significantly lower temperatures. Multiferroic YMn2O5 was synthesized by the hydrothermal method from Y(CH3COO)(3) center dot xH(2)O, Mn(CH3COO)(2) center dot 4H(2)O and KMnO4 precursors. XRD, FE-SEM and TEM analysis showed that the obtained powder was monophasic, with orthorhombic crystal structure and columnar particle shape with mean diameter and length of around 20 and 50 nm, respectively. The obtained powder was suspended in isopropyl alcohol with addition of appropriate binder and deflocculant. This suspension was used for electrophoretic deposition of YMn2O5 thick films under the high-voltage conditions and electric fields ranging from 250 to 2125 V/cm. The films obtained at 1000 V/cm and higher electric fields showed good adhesion, particle packing, homogeneity and very low porosity. It was shown that the deposition in extremely high electric fields (K-C=2125 V/cm) can influence the crystal orientation of the films, resulting in formation of preferentially oriented films.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "High-voltage electrophoretic deposition of preferentially oriented films from multiferroic YMn2O5 nanopowders",
pages = "2068-2065",
number = "2",
volume = "39",
doi = "10.1016/j.ceramint.2012.08.060"
}

Branković, G., Branković, Z., Sequinel, T., Žunić, M., Vuković, M., Tasić, N., Marinković, B. A., Cilense, M., Varela, J.,& Longo, E.. (2013). High-voltage electrophoretic deposition of preferentially oriented films from multiferroic YMn2O5 nanopowders. in Ceramics International
Elsevier Sci Ltd, Oxford., 39(2), 2065-2068.
https://doi.org/10.1016/j.ceramint.2012.08.060

Branković G, Branković Z, Sequinel T, Žunić M, Vuković M, Tasić N, Marinković BA, Cilense M, Varela J, Longo E. High-voltage electrophoretic deposition of preferentially oriented films from multiferroic YMn2O5 nanopowders. in Ceramics International. 2013;39(2):2065-2068.
doi:10.1016/j.ceramint.2012.08.060 .

Branković, Goran, Branković, Zorica, Sequinel, T, Žunić, Milan, Vuković, Marina, Tasić, Nikola, Marinković, Bojan A, Cilense, Mario, Varela, JA, Longo, Elson, "High-voltage electrophoretic deposition of preferentially oriented films from multiferroic YMn2O5 nanopowders" in Ceramics International, 39, no. 2 (2013):2065-2068,
https://doi.org/10.1016/j.ceramint.2012.08.060 . .

TY  - JOUR
AU  - Branković, Zorica
AU  - Branković, Goran
AU  - Tucić, Aleksandar
AU  - Radojković, Aleksandar
AU  - Longo, Elson
AU  - Varela, JA
PY  - 2009
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/315
AB  - In this work we optimized conditions for aerosol deposition of homogeneous, nano-grained, smooth Ba0.8Sr0.2TiO3 thin films. Investigation involved optimization of deposition parameters, namely deposition time and temperature for different substrates. Solutions were prepared from titanium isopropoxide, strontium acetate and barium acetate. Films were deposited on Si (1 0 0) or Si covered by platinum (Pt (1 1 1) /Ti/SiO2/Si). Investigation showed that the best films were obtained at substrate temperature of 85 degrees C. After deposition films were slowly heated up to 650 degrees C, annealed for 30 min, and slowly cooled. Grain size of BST films deposited on Si substrate were in the range 40-70 nm, depending on deposition conditions, while the same films deposited on Pt substrates showed mean grain size in the range 35-50 nm. Films deposited under optimal conditions were very homogeneous, crack-free, and smooth with rms roughness lower than 4 nm for both substrates.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Aerosol Deposition of Ba0.8Sr0.2TiO3 Thin Films
EP  - 308
IS  - 3
SP  - 303
VL  - 41
DO  - 10.2298/SOS0903303B
ER  - 

@article{
author = "Branković, Zorica and Branković, Goran and Tucić, Aleksandar and Radojković, Aleksandar and Longo, Elson and Varela, JA",
year = "2009",
abstract = "In this work we optimized conditions for aerosol deposition of homogeneous, nano-grained, smooth Ba0.8Sr0.2TiO3 thin films. Investigation involved optimization of deposition parameters, namely deposition time and temperature for different substrates. Solutions were prepared from titanium isopropoxide, strontium acetate and barium acetate. Films were deposited on Si (1 0 0) or Si covered by platinum (Pt (1 1 1) /Ti/SiO2/Si). Investigation showed that the best films were obtained at substrate temperature of 85 degrees C. After deposition films were slowly heated up to 650 degrees C, annealed for 30 min, and slowly cooled. Grain size of BST films deposited on Si substrate were in the range 40-70 nm, depending on deposition conditions, while the same films deposited on Pt substrates showed mean grain size in the range 35-50 nm. Films deposited under optimal conditions were very homogeneous, crack-free, and smooth with rms roughness lower than 4 nm for both substrates.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Aerosol Deposition of Ba0.8Sr0.2TiO3 Thin Films",
pages = "308-303",
number = "3",
volume = "41",
doi = "10.2298/SOS0903303B"
}

Branković, Z., Branković, G., Tucić, A., Radojković, A., Longo, E.,& Varela, J.. (2009). Aerosol Deposition of Ba0.8Sr0.2TiO3 Thin Films. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 41(3), 303-308.
https://doi.org/10.2298/SOS0903303B

Branković Z, Branković G, Tucić A, Radojković A, Longo E, Varela J. Aerosol Deposition of Ba0.8Sr0.2TiO3 Thin Films. in Science of Sintering. 2009;41(3):303-308.
doi:10.2298/SOS0903303B .

Branković, Zorica, Branković, Goran, Tucić, Aleksandar, Radojković, Aleksandar, Longo, Elson, Varela, JA, "Aerosol Deposition of Ba0.8Sr0.2TiO3 Thin Films" in Science of Sintering, 41, no. 3 (2009):303-308,
https://doi.org/10.2298/SOS0903303B . .

TY  - JOUR
AU  - Branković, Zorica
AU  - Branković, Goran
AU  - Vukotić, Vesna M
AU  - Tararam, R.
AU  - Varela, JA
PY  - 2008
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/247
AB  - The possibility of mechanochemical synthesis of the lead magnesium niobate (PMN) powders of the composition Pb(Mg1/3Nb2/3)O-3 in iron vials was investigated. According to X-ray and energy-dispersive spectroscopy (EDS) analysis of the obtained powder mixtures, milling in iron vials resulted in incorporation of Fe and formation of PFN of composition Pb(Fe1/2Nb1/2)O-3 simultaneously with formation of PMN. Relative amounts of PMN and PFN were determined based on values of Curie temperature and lattice constant of perovskite phase. Although only 1 wt pct of Fe was incorporated, a stoichiometry of the system was significantly changed, resulting in formation of pyrochlore phase and excess MgO. Single-phase perovskite was obtained when the excess of PbO and Nb2O5 was added during mechanochemical synthesis. Because the dielectric properties were worse than expected, the alternative ways for improvement of dielectric properties were tried and discussed.
PB  - Springer, New York
T2  - Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science
T1  - Mechanochemical synthesis of lead magnesium niobate ceramics in iron media
EP  - 879
IS  - 4
SP  - 875
VL  - 39A
DO  - 10.1007/s11661-007-9463-4
ER  - 

@article{
author = "Branković, Zorica and Branković, Goran and Vukotić, Vesna M and Tararam, R. and Varela, JA",
year = "2008",
abstract = "The possibility of mechanochemical synthesis of the lead magnesium niobate (PMN) powders of the composition Pb(Mg1/3Nb2/3)O-3 in iron vials was investigated. According to X-ray and energy-dispersive spectroscopy (EDS) analysis of the obtained powder mixtures, milling in iron vials resulted in incorporation of Fe and formation of PFN of composition Pb(Fe1/2Nb1/2)O-3 simultaneously with formation of PMN. Relative amounts of PMN and PFN were determined based on values of Curie temperature and lattice constant of perovskite phase. Although only 1 wt pct of Fe was incorporated, a stoichiometry of the system was significantly changed, resulting in formation of pyrochlore phase and excess MgO. Single-phase perovskite was obtained when the excess of PbO and Nb2O5 was added during mechanochemical synthesis. Because the dielectric properties were worse than expected, the alternative ways for improvement of dielectric properties were tried and discussed.",
publisher = "Springer, New York",
journal = "Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science",
title = "Mechanochemical synthesis of lead magnesium niobate ceramics in iron media",
pages = "879-875",
number = "4",
volume = "39A",
doi = "10.1007/s11661-007-9463-4"
}

Branković, Z., Branković, G., Vukotić, V. M., Tararam, R.,& Varela, J.. (2008). Mechanochemical synthesis of lead magnesium niobate ceramics in iron media. in Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science
Springer, New York., 39A(4), 875-879.
https://doi.org/10.1007/s11661-007-9463-4

Branković Z, Branković G, Vukotić VM, Tararam R, Varela J. Mechanochemical synthesis of lead magnesium niobate ceramics in iron media. in Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science. 2008;39A(4):875-879.
doi:10.1007/s11661-007-9463-4 .

Branković, Zorica, Branković, Goran, Vukotić, Vesna M, Tararam, R., Varela, JA, "Mechanochemical synthesis of lead magnesium niobate ceramics in iron media" in Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 39A, no. 4 (2008):875-879,
https://doi.org/10.1007/s11661-007-9463-4 . .

TY  - JOUR
AU  - Branković, Goran
AU  - Vukotić, Vesna M
AU  - Branković, Zorica
AU  - Varela, JA
PY  - 2007
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/184
AB  - Recently, mechanochemical synthesis was widely used in preparation of perovskite type of materials, such as BaTiO3, PbTiO3, PZT, etc. In this work, the possibility of mechanochemical synthesis of CaTiO3 from different precursors, such as CaCO3 or CaO and TiO2 was investigated. Intensive milling of mixture of CaO and TiO2, under optimal milling conditions, resulted in synthesis of single phase CaTiO3. It was also found that intensive milling of powder mixture containing CaCO3 and TiO2 only activate the powders for the sintering process; hence the CaTiO3 could be obtained at lower temperatures of sintering. To complete reaction of CaTiO3 formation during milling it is necessary to reduce CO2 partial pressure, i.e. it is necessary to change the atmosphere inside the vials during milling. In this work, an explanation for difference in milling behavior of different precursors was proposed and discussed.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of the European Ceramic Society
T1  - Investigation on possibility of mechanochemical synthesis of CaTiO3 from different precursors
EP  - 732
IS  - 2-3
SP  - 729
VL  - 27
DO  - 10.1016/j.jeurceramsoc.2006.04.051
ER  - 

@article{
author = "Branković, Goran and Vukotić, Vesna M and Branković, Zorica and Varela, JA",
year = "2007",
abstract = "Recently, mechanochemical synthesis was widely used in preparation of perovskite type of materials, such as BaTiO3, PbTiO3, PZT, etc. In this work, the possibility of mechanochemical synthesis of CaTiO3 from different precursors, such as CaCO3 or CaO and TiO2 was investigated. Intensive milling of mixture of CaO and TiO2, under optimal milling conditions, resulted in synthesis of single phase CaTiO3. It was also found that intensive milling of powder mixture containing CaCO3 and TiO2 only activate the powders for the sintering process; hence the CaTiO3 could be obtained at lower temperatures of sintering. To complete reaction of CaTiO3 formation during milling it is necessary to reduce CO2 partial pressure, i.e. it is necessary to change the atmosphere inside the vials during milling. In this work, an explanation for difference in milling behavior of different precursors was proposed and discussed.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of the European Ceramic Society",
title = "Investigation on possibility of mechanochemical synthesis of CaTiO3 from different precursors",
pages = "732-729",
number = "2-3",
volume = "27",
doi = "10.1016/j.jeurceramsoc.2006.04.051"
}

Branković, G., Vukotić, V. M., Branković, Z.,& Varela, J.. (2007). Investigation on possibility of mechanochemical synthesis of CaTiO3 from different precursors. in Journal of the European Ceramic Society
Elsevier Sci Ltd, Oxford., 27(2-3), 729-732.
https://doi.org/10.1016/j.jeurceramsoc.2006.04.051

Branković G, Vukotić VM, Branković Z, Varela J. Investigation on possibility of mechanochemical synthesis of CaTiO3 from different precursors. in Journal of the European Ceramic Society. 2007;27(2-3):729-732.
doi:10.1016/j.jeurceramsoc.2006.04.051 .

Branković, Goran, Vukotić, Vesna M, Branković, Zorica, Varela, JA, "Investigation on possibility of mechanochemical synthesis of CaTiO3 from different precursors" in Journal of the European Ceramic Society, 27, no. 2-3 (2007):729-732,
https://doi.org/10.1016/j.jeurceramsoc.2006.04.051 . .

TY  - JOUR
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - Leite, Daniela Russo
AU  - Varela, JA
PY  - 2006
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/172
AB  - Fractal dimensions of grain boundary region in doped SnO2 ceramics were determined based on previously derived fractal model. This model considers fractal dimension as a measure of homogeneity of distribution of charge carriers. Application of the derived fractal model enables calculation of fractal dimension using results of impedance spectroscopy. The model was verified by experimentally determined temperature dependence of the fractal dimension of SnO2 ceramics. Obtained results confirm that the non-Debye response of the grain boundary region is connected with distribution of defects and consequently with a homogeneity of a distribution of the charge carriers. Also, it was found that C-T-1 function has maximum at temperature at which the change in dominant type of defects takes place. This effect could be considered as a third-order transition.
PB  - Springer, New York
T2  - Journal of Materials Science
T1  - Temperature dependence of fractal dimension of grain boundary region in SnO2 based ceramics
EP  - 6197
IS  - 19
SP  - 6193
VL  - 41
DO  - 10.1007/s10853-006-0361-8
ER  - 

@article{
author = "Branković, Goran and Branković, Zorica and Leite, Daniela Russo and Varela, JA",
year = "2006",
abstract = "Fractal dimensions of grain boundary region in doped SnO2 ceramics were determined based on previously derived fractal model. This model considers fractal dimension as a measure of homogeneity of distribution of charge carriers. Application of the derived fractal model enables calculation of fractal dimension using results of impedance spectroscopy. The model was verified by experimentally determined temperature dependence of the fractal dimension of SnO2 ceramics. Obtained results confirm that the non-Debye response of the grain boundary region is connected with distribution of defects and consequently with a homogeneity of a distribution of the charge carriers. Also, it was found that C-T-1 function has maximum at temperature at which the change in dominant type of defects takes place. This effect could be considered as a third-order transition.",
publisher = "Springer, New York",
journal = "Journal of Materials Science",
title = "Temperature dependence of fractal dimension of grain boundary region in SnO2 based ceramics",
pages = "6197-6193",
number = "19",
volume = "41",
doi = "10.1007/s10853-006-0361-8"
}

Branković, G., Branković, Z., Leite, D. R.,& Varela, J.. (2006). Temperature dependence of fractal dimension of grain boundary region in SnO2 based ceramics. in Journal of Materials Science
Springer, New York., 41(19), 6193-6197.
https://doi.org/10.1007/s10853-006-0361-8

Branković G, Branković Z, Leite DR, Varela J. Temperature dependence of fractal dimension of grain boundary region in SnO2 based ceramics. in Journal of Materials Science. 2006;41(19):6193-6197.
doi:10.1007/s10853-006-0361-8 .

Branković, Goran, Branković, Zorica, Leite, Daniela Russo, Varela, JA, "Temperature dependence of fractal dimension of grain boundary region in SnO2 based ceramics" in Journal of Materials Science, 41, no. 19 (2006):6193-6197,
https://doi.org/10.1007/s10853-006-0361-8 . .

TY  - JOUR
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - Goes, MS
AU  - Paiva-Santos, C. O.
AU  - Cilense, Mario
AU  - Varela, JA
AU  - Longo, Elson
PY  - 2005
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/125
AB  - Ultasonic spray pyrolysis (SP) has been investigated for the production of the barium strontium titanate (BST) powders from the polymeric precursors. The processing parameters, such as flux of aerosol and temperature profile inside the furnace, were optimized to obtain single phase BST. The powders were characterized by the methods of X-ray diffraction analysis, SEM, EDS and TEM. The obtained powders were submicronic, consisting of spherical, polycrystalline particles, with internal nanocrystalline structure. Crystallite size of 10 nut, calculated using Rietveld refinement, is in a good agreement with results of HRTEM.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Science and Engineering B-Solid State Materials for Advanced Technology
T1  - Barium strontium titanate powders prepared by spray pyrolysis
EP  - 144
IS  - 2
SP  - 140
VL  - 122
DO  - 10.1016/j.mseb.2005.05.016
ER  - 

@article{
author = "Branković, Goran and Branković, Zorica and Goes, MS and Paiva-Santos, C. O. and Cilense, Mario and Varela, JA and Longo, Elson",
year = "2005",
abstract = "Ultasonic spray pyrolysis (SP) has been investigated for the production of the barium strontium titanate (BST) powders from the polymeric precursors. The processing parameters, such as flux of aerosol and temperature profile inside the furnace, were optimized to obtain single phase BST. The powders were characterized by the methods of X-ray diffraction analysis, SEM, EDS and TEM. The obtained powders were submicronic, consisting of spherical, polycrystalline particles, with internal nanocrystalline structure. Crystallite size of 10 nut, calculated using Rietveld refinement, is in a good agreement with results of HRTEM.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Science and Engineering B-Solid State Materials for Advanced Technology",
title = "Barium strontium titanate powders prepared by spray pyrolysis",
pages = "144-140",
number = "2",
volume = "122",
doi = "10.1016/j.mseb.2005.05.016"
}

Branković, G., Branković, Z., Goes, M., Paiva-Santos, C. O., Cilense, M., Varela, J.,& Longo, E.. (2005). Barium strontium titanate powders prepared by spray pyrolysis. in Materials Science and Engineering B-Solid State Materials for Advanced Technology
Elsevier Science Sa, Lausanne., 122(2), 140-144.
https://doi.org/10.1016/j.mseb.2005.05.016

Branković G, Branković Z, Goes M, Paiva-Santos CO, Cilense M, Varela J, Longo E. Barium strontium titanate powders prepared by spray pyrolysis. in Materials Science and Engineering B-Solid State Materials for Advanced Technology. 2005;122(2):140-144.
doi:10.1016/j.mseb.2005.05.016 .

Branković, Goran, Branković, Zorica, Goes, MS, Paiva-Santos, C. O., Cilense, Mario, Varela, JA, Longo, Elson, "Barium strontium titanate powders prepared by spray pyrolysis" in Materials Science and Engineering B-Solid State Materials for Advanced Technology, 122, no. 2 (2005):140-144,
https://doi.org/10.1016/j.mseb.2005.05.016 . .

TY  - JOUR
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - Varela, JA
PY  - 2005
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/116
AB  - SnO2 varistors doped with CoO, Cr2O3 and Nb2O5 were prepared by evaporation and decomposition of suspensions. The composition of the varistors was optimized to improve electrical properties, such as nonlinearity, leakage current and electrical stability. The best results were achieved with the following composition: 99.15% SnO2 +0.75% CoO+0.05% Cr2O3 +0.05% Nb2O5. Samples showed high density, reaching 99.5% of the theoretical density, as well as an homogeneous microstructure. The nonlinear coefficient was higher than 30 in the current range from 10(-7) to 10(-2) A/cm(2). The leakage current was 0.86 mu A/cm(2). These samples showed high stability of electrical parameters when they were exposed to high current of 27 mA/cm(2) for different time periods up to 30 min.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of the European Ceramic Society
T1  - Nonlinear properties and stability of SnO2 varistors prepared by evaporation and decomposition of suspensions
EP  - 3015
IS  - 12
SP  - 3011
VL  - 25
DO  - 10.1016/j.jeurceramsoc.2005.04.001
ER  - 

@article{
author = "Branković, Goran and Branković, Zorica and Varela, JA",
year = "2005",
abstract = "SnO2 varistors doped with CoO, Cr2O3 and Nb2O5 were prepared by evaporation and decomposition of suspensions. The composition of the varistors was optimized to improve electrical properties, such as nonlinearity, leakage current and electrical stability. The best results were achieved with the following composition: 99.15% SnO2 +0.75% CoO+0.05% Cr2O3 +0.05% Nb2O5. Samples showed high density, reaching 99.5% of the theoretical density, as well as an homogeneous microstructure. The nonlinear coefficient was higher than 30 in the current range from 10(-7) to 10(-2) A/cm(2). The leakage current was 0.86 mu A/cm(2). These samples showed high stability of electrical parameters when they were exposed to high current of 27 mA/cm(2) for different time periods up to 30 min.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of the European Ceramic Society",
title = "Nonlinear properties and stability of SnO2 varistors prepared by evaporation and decomposition of suspensions",
pages = "3015-3011",
number = "12",
volume = "25",
doi = "10.1016/j.jeurceramsoc.2005.04.001"
}

Branković, G., Branković, Z.,& Varela, J.. (2005). Nonlinear properties and stability of SnO2 varistors prepared by evaporation and decomposition of suspensions. in Journal of the European Ceramic Society
Elsevier Sci Ltd, Oxford., 25(12), 3011-3015.
https://doi.org/10.1016/j.jeurceramsoc.2005.04.001

Branković G, Branković Z, Varela J. Nonlinear properties and stability of SnO2 varistors prepared by evaporation and decomposition of suspensions. in Journal of the European Ceramic Society. 2005;25(12):3011-3015.
doi:10.1016/j.jeurceramsoc.2005.04.001 .

Branković, Goran, Branković, Zorica, Varela, JA, "Nonlinear properties and stability of SnO2 varistors prepared by evaporation and decomposition of suspensions" in Journal of the European Ceramic Society, 25, no. 12 (2005):3011-3015,
https://doi.org/10.1016/j.jeurceramsoc.2005.04.001 . .

TY  - JOUR
AU  - Branković, Zorica
AU  - Branković, Goran
AU  - Moura, F
AU  - Varela, JA
PY  - 2004
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/94
AB  - Mechanochemical synthesis was applied to obtain nanocrystalline powders of composition Pb(Zr0.52Ti0.48)O-3 (PZT). Milling was performed in a planetary ball mill using vials and balls made of zirconia or steel-in order to investigate influence of milling media on the electrical properties of resulting ceramics. PZT ceramics showed high values for dielectric constant (epsilon(r)), reaching 970 at room temperature, as well as low dielectric loss (tandelta) under the optimal processing conditions. High values of remanent polarization (P-r) indicate high internal polarizability. The best samples showed piezoelectric strain constant d(33) = 347 pC/N and planar coupling factor k(P) = 0.44. Milling in ZrO2 medium prevents powder contamination and provides reproducibility of milling process. Also, PZT obtained from the powders milled in ZrO2 exhibited lower values of dielectric loss, in comparison with the PTZ obtained from the powders milled in Fe. This suggests that contamination of the powder with Fe could result in an increase of conductivity in final product.
PB  - Springer, New York
T2  - Journal of Materials Science
T1  - Dielectric and piezoelectric properties of the mechanochemically prepared PZT ceramics
EP  - 5294
IS  - 16-17
SP  - 5291
VL  - 39
DO  - 10.1023/B:JMSC.0000039231.74493.86
ER  - 

@article{
author = "Branković, Zorica and Branković, Goran and Moura, F and Varela, JA",
year = "2004",
abstract = "Mechanochemical synthesis was applied to obtain nanocrystalline powders of composition Pb(Zr0.52Ti0.48)O-3 (PZT). Milling was performed in a planetary ball mill using vials and balls made of zirconia or steel-in order to investigate influence of milling media on the electrical properties of resulting ceramics. PZT ceramics showed high values for dielectric constant (epsilon(r)), reaching 970 at room temperature, as well as low dielectric loss (tandelta) under the optimal processing conditions. High values of remanent polarization (P-r) indicate high internal polarizability. The best samples showed piezoelectric strain constant d(33) = 347 pC/N and planar coupling factor k(P) = 0.44. Milling in ZrO2 medium prevents powder contamination and provides reproducibility of milling process. Also, PZT obtained from the powders milled in ZrO2 exhibited lower values of dielectric loss, in comparison with the PTZ obtained from the powders milled in Fe. This suggests that contamination of the powder with Fe could result in an increase of conductivity in final product.",
publisher = "Springer, New York",
journal = "Journal of Materials Science",
title = "Dielectric and piezoelectric properties of the mechanochemically prepared PZT ceramics",
pages = "5294-5291",
number = "16-17",
volume = "39",
doi = "10.1023/B:JMSC.0000039231.74493.86"
}

Branković, Z., Branković, G., Moura, F.,& Varela, J.. (2004). Dielectric and piezoelectric properties of the mechanochemically prepared PZT ceramics. in Journal of Materials Science
Springer, New York., 39(16-17), 5291-5294.
https://doi.org/10.1023/B:JMSC.0000039231.74493.86

Branković Z, Branković G, Moura F, Varela J. Dielectric and piezoelectric properties of the mechanochemically prepared PZT ceramics. in Journal of Materials Science. 2004;39(16-17):5291-5294.
doi:10.1023/B:JMSC.0000039231.74493.86 .

Branković, Zorica, Branković, Goran, Moura, F, Varela, JA, "Dielectric and piezoelectric properties of the mechanochemically prepared PZT ceramics" in Journal of Materials Science, 39, no. 16-17 (2004):5291-5294,
https://doi.org/10.1023/B:JMSC.0000039231.74493.86 . .

TY  - JOUR
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - Varela, JA
AU  - Longo, Elson
PY  - 2004
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/102
AB  - Strontium titanate thin films were prepared by spray pyrolysis technique. Deposition parameters, such as solution concentration, time and temperature of deposition, and flow rate of carrier gas were optimized to obtain dense films without cracks. Films with different thicknesses were prepared through the control of deposition time. Prepared thin films were homogeneous, well crystallized, with uniform grain size.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of the European Ceramic Society
T1  - Strontium titanate films prepared by spray pyrolysis
EP  - 991
IS  - 6
SP  - 989
VL  - 24
DO  - 10.1016/S0955-2219(03)00459-X
ER  - 

@article{
author = "Branković, Goran and Branković, Zorica and Varela, JA and Longo, Elson",
year = "2004",
abstract = "Strontium titanate thin films were prepared by spray pyrolysis technique. Deposition parameters, such as solution concentration, time and temperature of deposition, and flow rate of carrier gas were optimized to obtain dense films without cracks. Films with different thicknesses were prepared through the control of deposition time. Prepared thin films were homogeneous, well crystallized, with uniform grain size.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of the European Ceramic Society",
title = "Strontium titanate films prepared by spray pyrolysis",
pages = "991-989",
number = "6",
volume = "24",
doi = "10.1016/S0955-2219(03)00459-X"
}

Branković, G., Branković, Z., Varela, J.,& Longo, E.. (2004). Strontium titanate films prepared by spray pyrolysis. in Journal of the European Ceramic Society
Elsevier Sci Ltd, Oxford., 24(6), 989-991.
https://doi.org/10.1016/S0955-2219(03)00459-X

Branković G, Branković Z, Varela J, Longo E. Strontium titanate films prepared by spray pyrolysis. in Journal of the European Ceramic Society. 2004;24(6):989-991.
doi:10.1016/S0955-2219(03)00459-X .

Branković, Goran, Branković, Zorica, Varela, JA, Longo, Elson, "Strontium titanate films prepared by spray pyrolysis" in Journal of the European Ceramic Society, 24, no. 6 (2004):989-991,
https://doi.org/10.1016/S0955-2219(03)00459-X . .

TY  - JOUR
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - Davolos, MR
AU  - Cilense, Mario
AU  - Varela, JA
PY  - 2004
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/98
AB  - The influence of dopants commonly used in SnO2 varistor ceramics, such as CoO, Cr2O3 or Nb2O5, on the structural properties of SnO2 was investigated. Several SnO2-based ceramics containing only one of the dopants were prepared and characterized. Spectroscopic investigations [visible, near infrared (IR) and IR region] were performed to obtain information about dopants valence states inside the ceramics, as well as about their influence on electronic structure of the material. Structural properties were investigated by X-ray diffraction analysis and mechanisms of dopant incorporation were proposed. Obtained results were confirmed with results of the electrical measurements. Microstructural changes in doped ceramics were investigated by scanning electron microscopy (SEM) analysis that showed great differences in densities, grain size, and morphology of the SnO2 ceramics depending on type of dopants and their distribution.
PB  - Elsevier Science Inc, New York
T2  - Materials Characterization
T1  - Influence of the common varistor dopants (CoO, Cr2O3 and Nb2O5) on the structural properties of SnO2 ceramics
EP  - 251
IS  - 4-5
SP  - 243
VL  - 52
DO  - 10.1016/j.matchar.2002.11.001
ER  - 

@article{
author = "Branković, Goran and Branković, Zorica and Davolos, MR and Cilense, Mario and Varela, JA",
year = "2004",
abstract = "The influence of dopants commonly used in SnO2 varistor ceramics, such as CoO, Cr2O3 or Nb2O5, on the structural properties of SnO2 was investigated. Several SnO2-based ceramics containing only one of the dopants were prepared and characterized. Spectroscopic investigations [visible, near infrared (IR) and IR region] were performed to obtain information about dopants valence states inside the ceramics, as well as about their influence on electronic structure of the material. Structural properties were investigated by X-ray diffraction analysis and mechanisms of dopant incorporation were proposed. Obtained results were confirmed with results of the electrical measurements. Microstructural changes in doped ceramics were investigated by scanning electron microscopy (SEM) analysis that showed great differences in densities, grain size, and morphology of the SnO2 ceramics depending on type of dopants and their distribution.",
publisher = "Elsevier Science Inc, New York",
journal = "Materials Characterization",
title = "Influence of the common varistor dopants (CoO, Cr2O3 and Nb2O5) on the structural properties of SnO2 ceramics",
pages = "251-243",
number = "4-5",
volume = "52",
doi = "10.1016/j.matchar.2002.11.001"
}

Branković, G., Branković, Z., Davolos, M., Cilense, M.,& Varela, J.. (2004). Influence of the common varistor dopants (CoO, Cr2O3 and Nb2O5) on the structural properties of SnO2 ceramics. in Materials Characterization
Elsevier Science Inc, New York., 52(4-5), 243-251.
https://doi.org/10.1016/j.matchar.2002.11.001

Branković G, Branković Z, Davolos M, Cilense M, Varela J. Influence of the common varistor dopants (CoO, Cr2O3 and Nb2O5) on the structural properties of SnO2 ceramics. in Materials Characterization. 2004;52(4-5):243-251.
doi:10.1016/j.matchar.2002.11.001 .

Branković, Goran, Branković, Zorica, Davolos, MR, Cilense, Mario, Varela, JA, "Influence of the common varistor dopants (CoO, Cr2O3 and Nb2O5) on the structural properties of SnO2 ceramics" in Materials Characterization, 52, no. 4-5 (2004):243-251,
https://doi.org/10.1016/j.matchar.2002.11.001 . .

TY  - JOUR
AU  - Branković, Zorica
AU  - Branković, Goran
AU  - Varela, JA
PY  - 2004
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/103
AB  - PZT thin films of composition Pb(Zr0.52Ti0.48)O-3 were prepared by a novel method from the suspension of nanocrystalline PZT powders. The powders were obtained by mechanochemical synthesis. Films were deposited on silicon (100) and platinum covered silicon substrates (Pt (111) /Ti/SiO2/Si) Using spin-on technique. Substrate type has influence on films crystallinity, orientation and can react with the films changing its phase composition. Films microstructure strongly depends on thermal treatment conditions due to phase and compositional changes of the films.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of the European Ceramic Society
T1  - Microstructural investigation of the PZT films prepared from the suspension of nanocrystalline powders
EP  - 1948
IS  - 6
SP  - 1945
VL  - 24
DO  - 10.1016/S0955-2219(03)00541-7
ER  - 

@article{
author = "Branković, Zorica and Branković, Goran and Varela, JA",
year = "2004",
abstract = "PZT thin films of composition Pb(Zr0.52Ti0.48)O-3 were prepared by a novel method from the suspension of nanocrystalline PZT powders. The powders were obtained by mechanochemical synthesis. Films were deposited on silicon (100) and platinum covered silicon substrates (Pt (111) /Ti/SiO2/Si) Using spin-on technique. Substrate type has influence on films crystallinity, orientation and can react with the films changing its phase composition. Films microstructure strongly depends on thermal treatment conditions due to phase and compositional changes of the films.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of the European Ceramic Society",
title = "Microstructural investigation of the PZT films prepared from the suspension of nanocrystalline powders",
pages = "1948-1945",
number = "6",
volume = "24",
doi = "10.1016/S0955-2219(03)00541-7"
}

Branković, Z., Branković, G.,& Varela, J.. (2004). Microstructural investigation of the PZT films prepared from the suspension of nanocrystalline powders. in Journal of the European Ceramic Society
Elsevier Sci Ltd, Oxford., 24(6), 1945-1948.
https://doi.org/10.1016/S0955-2219(03)00541-7

Branković Z, Branković G, Varela J. Microstructural investigation of the PZT films prepared from the suspension of nanocrystalline powders. in Journal of the European Ceramic Society. 2004;24(6):1945-1948.
doi:10.1016/S0955-2219(03)00541-7 .

Branković, Zorica, Branković, Goran, Varela, JA, "Microstructural investigation of the PZT films prepared from the suspension of nanocrystalline powders" in Journal of the European Ceramic Society, 24, no. 6 (2004):1945-1948,
https://doi.org/10.1016/S0955-2219(03)00541-7 . .

TY  - JOUR
AU  - Branković, Zorica
AU  - Branković, Goran
AU  - Varela, JA
PY  - 2003
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/82
AB  - PZT ceramics were obtained from the mechanochemically synthesized powders. Milling and sintering conditions were optimized based on results of density measurements, as well as on microstructural and electrical characterization. As a result, highly dense and homogeneous ceramics were obtained. Excellent microstructural properties resulted in good electrical properties. Samples showed values of dielectric constants reaching 12800 at the Curie temperature, as well as low dielectric loss under the optimal processing conditions. High values of remanent polarization, reaching 60 muC cm(-2), indicate high internal polarizability.
PB  - Kluwer Academic Publ, Dordrecht
T2  - Journal of Materials Science-Materials in Electronics
T1  - PZT ceramics obtained from mechanochemically synthesized powders
EP  - 41
IS  - 1
SP  - 37
VL  - 14
DO  - 10.1023/A:1021527615661
ER  - 

@article{
author = "Branković, Zorica and Branković, Goran and Varela, JA",
year = "2003",
abstract = "PZT ceramics were obtained from the mechanochemically synthesized powders. Milling and sintering conditions were optimized based on results of density measurements, as well as on microstructural and electrical characterization. As a result, highly dense and homogeneous ceramics were obtained. Excellent microstructural properties resulted in good electrical properties. Samples showed values of dielectric constants reaching 12800 at the Curie temperature, as well as low dielectric loss under the optimal processing conditions. High values of remanent polarization, reaching 60 muC cm(-2), indicate high internal polarizability.",
publisher = "Kluwer Academic Publ, Dordrecht",
journal = "Journal of Materials Science-Materials in Electronics",
title = "PZT ceramics obtained from mechanochemically synthesized powders",
pages = "41-37",
number = "1",
volume = "14",
doi = "10.1023/A:1021527615661"
}

Branković, Z., Branković, G.,& Varela, J.. (2003). PZT ceramics obtained from mechanochemically synthesized powders. in Journal of Materials Science-Materials in Electronics
Kluwer Academic Publ, Dordrecht., 14(1), 37-41.
https://doi.org/10.1023/A:1021527615661

Branković Z, Branković G, Varela J. PZT ceramics obtained from mechanochemically synthesized powders. in Journal of Materials Science-Materials in Electronics. 2003;14(1):37-41.
doi:10.1023/A:1021527615661 .

Branković, Zorica, Branković, Goran, Varela, JA, "PZT ceramics obtained from mechanochemically synthesized powders" in Journal of Materials Science-Materials in Electronics, 14, no. 1 (2003):37-41,
https://doi.org/10.1023/A:1021527615661 . .

TY  - JOUR
AU  - Branković, Zorica
AU  - Branković, Goran
AU  - Jovalekic, C
AU  - Maniette, Y
AU  - Cilense, Mario
AU  - Varela, JA
PY  - 2003
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/84
AB  - PZT ceramic powders were successfully prepared from the mixture of PbO, ZrO2 and TiO2 by mechanochemical synthesis in a planetary ball mill, under different milling conditions. Phase evolution during synthesis was monitored by X-ray diffraction analysis. Intensive milling resulted in formation of the nanocrystalline, perovskite PZT powders after 1 h of milling. This is a significant improvement in comparison to milling conditions reported by other authors. Depending on milling parameters the presence of some other phases, such as unreacted ZrO2, was also detected in some samples. The changes in powder size and morphology due to intensive milling, were determined by SEM and TEM, while BET analysis was used to determine specific surface area of the powders. Conclusions about processes taking place during mechanochemical synthesis of PZT powders were made based on the results of characterization.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
T1  - Mechanochemical synthesis of PZT powders
EP  - 248
IS  - 1-2
SP  - 243
VL  - 345
DO  - 10.1016/S0921-5093(02)00475-6
ER  - 

@article{
author = "Branković, Zorica and Branković, Goran and Jovalekic, C and Maniette, Y and Cilense, Mario and Varela, JA",
year = "2003",
abstract = "PZT ceramic powders were successfully prepared from the mixture of PbO, ZrO2 and TiO2 by mechanochemical synthesis in a planetary ball mill, under different milling conditions. Phase evolution during synthesis was monitored by X-ray diffraction analysis. Intensive milling resulted in formation of the nanocrystalline, perovskite PZT powders after 1 h of milling. This is a significant improvement in comparison to milling conditions reported by other authors. Depending on milling parameters the presence of some other phases, such as unreacted ZrO2, was also detected in some samples. The changes in powder size and morphology due to intensive milling, were determined by SEM and TEM, while BET analysis was used to determine specific surface area of the powders. Conclusions about processes taking place during mechanochemical synthesis of PZT powders were made based on the results of characterization.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing",
title = "Mechanochemical synthesis of PZT powders",
pages = "248-243",
number = "1-2",
volume = "345",
doi = "10.1016/S0921-5093(02)00475-6"
}

Branković, Z., Branković, G., Jovalekic, C., Maniette, Y., Cilense, M.,& Varela, J.. (2003). Mechanochemical synthesis of PZT powders. in Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
Elsevier Science Sa, Lausanne., 345(1-2), 243-248.
https://doi.org/10.1016/S0921-5093(02)00475-6

Branković Z, Branković G, Jovalekic C, Maniette Y, Cilense M, Varela J. Mechanochemical synthesis of PZT powders. in Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing. 2003;345(1-2):243-248.
doi:10.1016/S0921-5093(02)00475-6 .

Branković, Zorica, Branković, Goran, Jovalekic, C, Maniette, Y, Cilense, Mario, Varela, JA, "Mechanochemical synthesis of PZT powders" in Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 345, no. 1-2 (2003):243-248,
https://doi.org/10.1016/S0921-5093(02)00475-6 . .

TY  - JOUR
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - Santos, L.P.S.
AU  - Longo, Elson
AU  - Davolos, M.R.
AU  - Varela, JA
PY  - 2003
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/89
AB  - SnO2 ceramics doped with different amounts of Co, Cr or Nb were investigated using visible and infrared spectroscopy at room temperature. Based on the observed d-d transitions the valence states of incorporated dopants were determined. Values of the optical band-gap were calculated in all samples. The infrared spectra of the samples displayed variations in the position, relative intensity and width of the bands, which were attributed to the presence of dopants.
PB  - Trans Tech Publications Ltd
T2  - Materials Science Forum
T1  - Spectroscopic studies of SnO2 doped with Cr, Co or Nb
EP  - 656
IS  - 1
SP  - 651
VL  - 416-418
DO  - 10.4028/www.scientific.net/MSF.416-418.651
ER  - 

@article{
author = "Branković, Goran and Branković, Zorica and Santos, L.P.S. and Longo, Elson and Davolos, M.R. and Varela, JA",
year = "2003",
abstract = "SnO2 ceramics doped with different amounts of Co, Cr or Nb were investigated using visible and infrared spectroscopy at room temperature. Based on the observed d-d transitions the valence states of incorporated dopants were determined. Values of the optical band-gap were calculated in all samples. The infrared spectra of the samples displayed variations in the position, relative intensity and width of the bands, which were attributed to the presence of dopants.",
publisher = "Trans Tech Publications Ltd",
journal = "Materials Science Forum",
title = "Spectroscopic studies of SnO2 doped with Cr, Co or Nb",
pages = "656-651",
number = "1",
volume = "416-418",
doi = "10.4028/www.scientific.net/MSF.416-418.651"
}

Branković, G., Branković, Z., Santos, L.P.S., Longo, E., Davolos, M.R.,& Varela, J.. (2003). Spectroscopic studies of SnO2 doped with Cr, Co or Nb. in Materials Science Forum
Trans Tech Publications Ltd., 416-418(1), 651-656.
https://doi.org/10.4028/www.scientific.net/MSF.416-418.651

Branković G, Branković Z, Santos L, Longo E, Davolos M, Varela J. Spectroscopic studies of SnO2 doped with Cr, Co or Nb. in Materials Science Forum. 2003;416-418(1):651-656.
doi:10.4028/www.scientific.net/MSF.416-418.651 .

Branković, Goran, Branković, Zorica, Santos, L.P.S., Longo, Elson, Davolos, M.R., Varela, JA, "Spectroscopic studies of SnO2 doped with Cr, Co or Nb" in Materials Science Forum, 416-418, no. 1 (2003):651-656,
https://doi.org/10.4028/www.scientific.net/MSF.416-418.651 . .

TY  - JOUR
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - Jović, Vladimir D
AU  - Varela, JA
PY  - 2001
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/62
AB  - A novel fractal model for grain boundary regions of ceramic materials was developed. The model considers laterally inhomogeneous distribution of charge carriers in the vicinity of grain boundaries as the main cause of the non-Debye behaviour and distribution of relaxation times in ceramic materials. Considering the equivalent circuit the impedance of the grain boundary region was expressed. It was shown that the impedance of the grain boundary region has the form of the Davidson-Cole equation. The fractal dimension of the inhomogeneous distribution of charge carriers in the region close to the grain boundaries could be calculated based on the relation d(s) = 1 + beta, where beta is the constant from the Davidson-Cole equation.
PB  - Kluwer Academic Publ, Dordrecht
T2  - Journal of Electroceramics
T1  - Fractal approach to ac impedance spectroscopy studies of ceramic materials
EP  - 94
IS  - 2
SP  - 89
VL  - 7
DO  - 10.1023/A:1013166204618
ER  - 

@article{
author = "Branković, Goran and Branković, Zorica and Jović, Vladimir D and Varela, JA",
year = "2001",
abstract = "A novel fractal model for grain boundary regions of ceramic materials was developed. The model considers laterally inhomogeneous distribution of charge carriers in the vicinity of grain boundaries as the main cause of the non-Debye behaviour and distribution of relaxation times in ceramic materials. Considering the equivalent circuit the impedance of the grain boundary region was expressed. It was shown that the impedance of the grain boundary region has the form of the Davidson-Cole equation. The fractal dimension of the inhomogeneous distribution of charge carriers in the region close to the grain boundaries could be calculated based on the relation d(s) = 1 + beta, where beta is the constant from the Davidson-Cole equation.",
publisher = "Kluwer Academic Publ, Dordrecht",
journal = "Journal of Electroceramics",
title = "Fractal approach to ac impedance spectroscopy studies of ceramic materials",
pages = "94-89",
number = "2",
volume = "7",
doi = "10.1023/A:1013166204618"
}

Branković, G., Branković, Z., Jović, V. D.,& Varela, J.. (2001). Fractal approach to ac impedance spectroscopy studies of ceramic materials. in Journal of Electroceramics
Kluwer Academic Publ, Dordrecht., 7(2), 89-94.
https://doi.org/10.1023/A:1013166204618

Branković G, Branković Z, Jović VD, Varela J. Fractal approach to ac impedance spectroscopy studies of ceramic materials. in Journal of Electroceramics. 2001;7(2):89-94.
doi:10.1023/A:1013166204618 .

Branković, Goran, Branković, Zorica, Jović, Vladimir D, Varela, JA, "Fractal approach to ac impedance spectroscopy studies of ceramic materials" in Journal of Electroceramics, 7, no. 2 (2001):89-94,
https://doi.org/10.1023/A:1013166204618 . .

TY  - JOUR
AU  - Branković, Zorica
AU  - Branković, Goran
AU  - Poleti, Dejan
AU  - Varela, JA
PY  - 2001
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/63
AB  - Structural and electrical properties of ZnO varistors were investigated as a function of spinel composition. Six varistor mixtures differing only in chemical composition of spinel, were prepared by mixing separately synthesized constituent phases (DSCP method). Compositions of constituent phases in sintered samples were investigated by changes of lattice parameters of the phases, as well as by EDS analysis of the constituent phases. It was found that compositions of ZnO, intergranular and spinel phases were partially changed during sintering due to redistribution of additives, that was controlled by starting spinel composition and its stability. Electrical characterization showed significant difference in electrical properties of investigated varistors: nonlinearity coefficients ranging from 22 to 55 and leakage currents differing by the order of magnitude. Activation energies of conduction were obtained from ac impedance spectroscopy measurements. Calculated values of activation energies were in the range 0.61-1.0 eV confirming difference in defect structure of ZnO grain boundaries in varistors containing different spinel phases.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Structural and electrical properties of ZnO varistors containing different spinel phases
EP  - 122
IS  - 1
SP  - 115
VL  - 27
DO  - 10.1016/S0272-8842(00)00051-1
ER  - 

@article{
author = "Branković, Zorica and Branković, Goran and Poleti, Dejan and Varela, JA",
year = "2001",
abstract = "Structural and electrical properties of ZnO varistors were investigated as a function of spinel composition. Six varistor mixtures differing only in chemical composition of spinel, were prepared by mixing separately synthesized constituent phases (DSCP method). Compositions of constituent phases in sintered samples were investigated by changes of lattice parameters of the phases, as well as by EDS analysis of the constituent phases. It was found that compositions of ZnO, intergranular and spinel phases were partially changed during sintering due to redistribution of additives, that was controlled by starting spinel composition and its stability. Electrical characterization showed significant difference in electrical properties of investigated varistors: nonlinearity coefficients ranging from 22 to 55 and leakage currents differing by the order of magnitude. Activation energies of conduction were obtained from ac impedance spectroscopy measurements. Calculated values of activation energies were in the range 0.61-1.0 eV confirming difference in defect structure of ZnO grain boundaries in varistors containing different spinel phases.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Structural and electrical properties of ZnO varistors containing different spinel phases",
pages = "122-115",
number = "1",
volume = "27",
doi = "10.1016/S0272-8842(00)00051-1"
}

Branković, Z., Branković, G., Poleti, D.,& Varela, J.. (2001). Structural and electrical properties of ZnO varistors containing different spinel phases. in Ceramics International
Elsevier Sci Ltd, Oxford., 27(1), 115-122.
https://doi.org/10.1016/S0272-8842(00)00051-1

Branković Z, Branković G, Poleti D, Varela J. Structural and electrical properties of ZnO varistors containing different spinel phases. in Ceramics International. 2001;27(1):115-122.
doi:10.1016/S0272-8842(00)00051-1 .

Branković, Zorica, Branković, Goran, Poleti, Dejan, Varela, JA, "Structural and electrical properties of ZnO varistors containing different spinel phases" in Ceramics International, 27, no. 1 (2001):115-122,
https://doi.org/10.1016/S0272-8842(00)00051-1 . .