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Title: Chemical degradation in ZnO-based varistors
Other Titles: ZnO壓敏電阻的化學蛻變
Authors: Li, BR
Chen, WP
Chan, HLW 
Keywords: Varistors
Chemical degradation
Degradation mechanism
Reduction with hydrogen
Issue Date: 2002
Publisher: 中国电子学会元件分会
Source: 电子元件与材料 (Electronic components & materials), 2002, v. 21, no. 4, p. 12-14 How to cite?
Journal: 电子元件与材料 (Electronic components & materials) 
Abstract: ZnO varistors being placed in a 0.05 mol/L NaOH solution to be DC electrolyzed can lead to increased leakage current, weakened nonlinear characteristic and other degradation phenomena. After heat treatment at 650℃, its characteristic can be recovered. The mechanism is different from conventional electrical degradation. It is proved that it is the hydrogen atoms produce reduction reaction round the grain boundaries of the ceramics. The possible degradation mechanism is also discussed.
ISSN: 1001-2028
Rights: © 2002 中国学术期刊电子杂志出版社。本内容的使用仅限于教育、科研之目的。
© 2002 China Academic Journal Electronic Publishing House. It is to be used strictly for educational and research purposes.
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