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Bi 2 O 3 Vaporization in Microwave‐Sintered ZnO Varistors
Author(s) -
Cong Lin,
Zheng Xu,
Hu Peng,
Danfeng Sun
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.01848.x
Subject(s) - vaporization , varistor , materials science , microwave , microstructure , composite material , analytical chemistry (journal) , mineralogy , voltage , electrical engineering , chemistry , telecommunications , organic chemistry , computer science , engineering , chromatography
Vaporization of Bi 2 O 3 in microwave‐sintered ZnO varistors is discussed in this study. The Bi 2 O 3 vaporization of ZnO varistors sintered by a conventional electric furnace is also studied for comparison. The results show that the Bi 2 O 3 vaporization in microwave‐sintered ZnO varistors is more homogenous from the surface to the inside of the sample, which results from the special thermal gradient inside the microwave‐sintered samples, and we also find out that the Bi 2 O 3 vaporization directly affects the electrical properties of ZnO varistors. Microwave‐sintered samples exhibit more excellent electrical properties than the conventional ones because the homogenous Bi 2 O 3 vaporization leads to more uniform microstructures.