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- Title
Low-temperature sintering of high potential gradient BO-doped ZnO varistors.
- Authors
Xu, Zhijun; Ma, Shuai; Chu, Ruiqing; Hao, Jigong; Cheng, Lihong; Li, Guorong
- Abstract
High voltage gradient ZnO-BiO-based varistor ceramics doped with different amounts of BO were prepared by the conventional ceramics processing at low temperature and their phase transformation, microstructure and electrical properties were investigated. BO addition promoted the formation of a liquid phase along the grain boundary and triple junctions of the ZnO grains and improved electrical properties. ZnO-BiO-based varistors with nonlinearity coefficients (α) exceeding 45, the leakage current ( I) not more than 0.1 μA and breakdown fields ranging from 880 to 1450 V/mm were obtained by doping with 0.5-2 wt% BO at the sintering temperature of 850 °C and dwelling time of 5 h.
- Subjects
HIGH voltages; VARISTORS; PHASE transitions; MICROSTRUCTURE; ELECTRIC potential
- Publication
Journal of Materials Science: Materials in Electronics, 2015, Vol 26, Issue 7, p4997
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-015-3012-5