环氧粉末包封的ZnO压敏电阻器的湿热劣化规律研究  

STUDY ON MOISTURE HEAT DETERIORATION OF ZnO VARISTORS PACKED WITH EPOXY POWDER

作　　者：李建英[1] 刘辅宜[1] 李盛涛[1] 

机构地区：[1]西安交通大学电气绝缘研究所

出　　处：《高分子材料科学与工程》1999年第2期129-131,共3页Polymer Materials Science & Engineering

摘　　要：研究了３种湿热方式作用下ＺｎＯ压敏电阻器的性能劣化规律，以及环氧粉末的固化条件的影响。分析与讨论了湿热联合作用下ＺｎＯ压敏电阻器受潮机理，以及温度和压力在湿热劣化过程中的加速作用。The electrical properties of ZnO varistors packed with epoxy powder will deteriorate under the conditions of moisture and heat。 The electrical deterioration rules of ZnO varistors under three moisture heat modes were studied, the different results of the three modes were contrasted, and the influence of the curing condition of the epoxy powder on the deterioration was also studied。 The wetting processes of ZnO varistors packed with epoxy powder under the conditions of moisture and heat and the acceleration of temperature and pressure have been analyzed。 It was found that in the process of the moisture heat deterioration, temperature can play a more important role than pressure。

关 键 词：压敏电阻器 环氧粉末 湿热劣化 氧化锌 绝缘层 

分 类 号：TM540.6[电气工程—电器]