Previously synthesized nanocrystalline ZnO doped with cobalt and manganese, Bi2O3 and Sb2O3 were the precursors for high voltage varistors preparation. Varistor ceramics were sintered at 750 degrees C, 770 degrees C or 900 degrees C for 1 h. An amount of 30 mass% of secondary phases and sintering temperature of 770 degrees C were found to be optimal for obtaining varistor with prominent properties. Achieved density was 97% of the theoretical value. Post-sintering phase composition included ZnO, gamma-Bi2O3 and pyrochlore-type with Zn2Bi3Sb3O14 nominal formula. Fine grained microstructure was accompanied with good phase distribution and excellent electrical characteristics: extraordinary high breakdown field of 3200 V mm(-1), high nonlinearity coefficients of 71 and 51 in 0.1-1 and 1-10 mA cm(-2) current density ranges, respectively, and low leakage current of 7.7 mu A cm(-2).
Keywords:
Uniform microstructure / Submicronic grain size / Nanoprecursors / High voltage ZnO varistors / Electrical characteristics
Source:
Journal of the European Ceramic Society, 2015, 35, 6, 1807-1814
TY - JOUR
AU - Vuković, Marina
AU - Branković, Goran
AU - Marinković-Stanojević, Zorica
AU - Poleti, Dejan
AU - Branković, Zorica
PY - 2015
UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/874
AB - Previously synthesized nanocrystalline ZnO doped with cobalt and manganese, Bi2O3 and Sb2O3 were the precursors for high voltage varistors preparation. Varistor ceramics were sintered at 750 degrees C, 770 degrees C or 900 degrees C for 1 h. An amount of 30 mass% of secondary phases and sintering temperature of 770 degrees C were found to be optimal for obtaining varistor with prominent properties. Achieved density was 97% of the theoretical value. Post-sintering phase composition included ZnO, gamma-Bi2O3 and pyrochlore-type with Zn2Bi3Sb3O14 nominal formula. Fine grained microstructure was accompanied with good phase distribution and excellent electrical characteristics: extraordinary high breakdown field of 3200 V mm(-1), high nonlinearity coefficients of 71 and 51 in 0.1-1 and 1-10 mA cm(-2) current density ranges, respectively, and low leakage current of 7.7 mu A cm(-2).
PB - Elsevier Sci Ltd, Oxford
T2 - Journal of the European Ceramic Society
T1 - Ultra-high breakdown field varistors prepared from individually synthesized nanoprecursors
EP - 1814
IS - 6
SP - 1807
VL - 35
DO - 10.1016/j.jeurceramsoc.2014.12.015
ER -
@article{
author = "Vuković, Marina and Branković, Goran and Marinković-Stanojević, Zorica and Poleti, Dejan and Branković, Zorica",
year = "2015",
abstract = "Previously synthesized nanocrystalline ZnO doped with cobalt and manganese, Bi2O3 and Sb2O3 were the precursors for high voltage varistors preparation. Varistor ceramics were sintered at 750 degrees C, 770 degrees C or 900 degrees C for 1 h. An amount of 30 mass% of secondary phases and sintering temperature of 770 degrees C were found to be optimal for obtaining varistor with prominent properties. Achieved density was 97% of the theoretical value. Post-sintering phase composition included ZnO, gamma-Bi2O3 and pyrochlore-type with Zn2Bi3Sb3O14 nominal formula. Fine grained microstructure was accompanied with good phase distribution and excellent electrical characteristics: extraordinary high breakdown field of 3200 V mm(-1), high nonlinearity coefficients of 71 and 51 in 0.1-1 and 1-10 mA cm(-2) current density ranges, respectively, and low leakage current of 7.7 mu A cm(-2).",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of the European Ceramic Society",
title = "Ultra-high breakdown field varistors prepared from individually synthesized nanoprecursors",
pages = "1814-1807",
number = "6",
volume = "35",
doi = "10.1016/j.jeurceramsoc.2014.12.015"
}
Vuković, M., Branković, G., Marinković-Stanojević, Z., Poleti, D.,& Branković, Z.. (2015). Ultra-high breakdown field varistors prepared from individually synthesized nanoprecursors. in Journal of the European Ceramic Society
Elsevier Sci Ltd, Oxford., 35(6), 1807-1814.
https://doi.org/10.1016/j.jeurceramsoc.2014.12.015
Vuković M, Branković G, Marinković-Stanojević Z, Poleti D, Branković Z. Ultra-high breakdown field varistors prepared from individually synthesized nanoprecursors. in Journal of the European Ceramic Society. 2015;35(6):1807-1814.
doi:10.1016/j.jeurceramsoc.2014.12.015 .
Vuković, Marina, Branković, Goran, Marinković-Stanojević, Zorica, Poleti, Dejan, Branković, Zorica, "Ultra-high breakdown field varistors prepared from individually synthesized nanoprecursors" in Journal of the European Ceramic Society, 35, no. 6 (2015):1807-1814,
https://doi.org/10.1016/j.jeurceramsoc.2014.12.015 . .
