ZnO varistors from intensively milled powders
Abstract
Two ways of application of intensive milling in ZnO varistors processing were compared. First was intensive milling of mixture of previously prepared constituent phases. In this case, intensive milling was applied only to obtain highly activated nanocrystalline varistor powder mixtures. Second application is intensive milling of simple mixture of oxides that could result not only in activation and formation of nanocrystal line powders, but also in mechanochernical reaction and synthesis of constituent phases. Powders and ceramics samples were characterized by XRD and SEM analysis. as well as by de electrical measurements (nonlinearity coefficients, leakage current and breakdown field). Differences in microstructural and electrical properties of obtained varistors were discussed and optimal milling and processing conditions were recommended. The best electrical characteristics were found in sample ZI -DMCP-m, which exhibited leakage current of 2.5 mu A/cm(2), nonlinear coefficient reach...ing 58 and breakdown field of 8950 V/cm.
Keywords:
ZnO / varistors / milling / grain boundaries / electrical propertiesSource:
Journal of the European Ceramic Society, 2007, 27, 13-15, 3897-3900Publisher:
- Elsevier Sci Ltd, Oxford
DOI: 10.1016/j.jeurceramsoc.2007.02.055
ISSN: 0955-2219
WoS: 000248822800068
Scopus: 2-s2.0-34347372904
Collections
Institution/Community
Institut za multidisciplinarna istraživanjaTY - JOUR AU - Žunić, Milan AU - Branković, Zorica AU - Bernik, Slavko AU - Goes, M. S. AU - Branković, Goran PY - 2007 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/193 AB - Two ways of application of intensive milling in ZnO varistors processing were compared. First was intensive milling of mixture of previously prepared constituent phases. In this case, intensive milling was applied only to obtain highly activated nanocrystalline varistor powder mixtures. Second application is intensive milling of simple mixture of oxides that could result not only in activation and formation of nanocrystal line powders, but also in mechanochernical reaction and synthesis of constituent phases. Powders and ceramics samples were characterized by XRD and SEM analysis. as well as by de electrical measurements (nonlinearity coefficients, leakage current and breakdown field). Differences in microstructural and electrical properties of obtained varistors were discussed and optimal milling and processing conditions were recommended. The best electrical characteristics were found in sample ZI -DMCP-m, which exhibited leakage current of 2.5 mu A/cm(2), nonlinear coefficient reaching 58 and breakdown field of 8950 V/cm. PB - Elsevier Sci Ltd, Oxford T2 - Journal of the European Ceramic Society T1 - ZnO varistors from intensively milled powders EP - 3900 IS - 13-15 SP - 3897 VL - 27 DO - 10.1016/j.jeurceramsoc.2007.02.055 ER -
@article{ author = "Žunić, Milan and Branković, Zorica and Bernik, Slavko and Goes, M. S. and Branković, Goran", year = "2007", abstract = "Two ways of application of intensive milling in ZnO varistors processing were compared. First was intensive milling of mixture of previously prepared constituent phases. In this case, intensive milling was applied only to obtain highly activated nanocrystalline varistor powder mixtures. Second application is intensive milling of simple mixture of oxides that could result not only in activation and formation of nanocrystal line powders, but also in mechanochernical reaction and synthesis of constituent phases. Powders and ceramics samples were characterized by XRD and SEM analysis. as well as by de electrical measurements (nonlinearity coefficients, leakage current and breakdown field). Differences in microstructural and electrical properties of obtained varistors were discussed and optimal milling and processing conditions were recommended. The best electrical characteristics were found in sample ZI -DMCP-m, which exhibited leakage current of 2.5 mu A/cm(2), nonlinear coefficient reaching 58 and breakdown field of 8950 V/cm.", publisher = "Elsevier Sci Ltd, Oxford", journal = "Journal of the European Ceramic Society", title = "ZnO varistors from intensively milled powders", pages = "3900-3897", number = "13-15", volume = "27", doi = "10.1016/j.jeurceramsoc.2007.02.055" }
Žunić, M., Branković, Z., Bernik, S., Goes, M. S.,& Branković, G.. (2007). ZnO varistors from intensively milled powders. in Journal of the European Ceramic Society Elsevier Sci Ltd, Oxford., 27(13-15), 3897-3900. https://doi.org/10.1016/j.jeurceramsoc.2007.02.055
Žunić M, Branković Z, Bernik S, Goes MS, Branković G. ZnO varistors from intensively milled powders. in Journal of the European Ceramic Society. 2007;27(13-15):3897-3900. doi:10.1016/j.jeurceramsoc.2007.02.055 .
Žunić, Milan, Branković, Zorica, Bernik, Slavko, Goes, M. S., Branković, Goran, "ZnO varistors from intensively milled powders" in Journal of the European Ceramic Society, 27, no. 13-15 (2007):3897-3900, https://doi.org/10.1016/j.jeurceramsoc.2007.02.055 . .