氧化锌压敏电阻片的热刺激电流测试研究  

Measurement of Thermally Stimulated Current in ZnO Varistor

作　　者：屠幼萍[1] 何洁[1] 王倩[1] 刘美[1] 徐光亮 丁立健[1] 

机构地区：[1]高电压与电磁兼容北京市重点实验室(华北电力大学),北京市昌平区102206 [2]商丘供电公司,河南省商丘市476000

出　　处：《中国电机工程学报》2010年第33期116-121,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50577021);高等学校博士学科点专项科研基金项目(200800790004)~~

摘　　要：热刺激电流(thermally stimulated current,TSC)技术是研究各种电介质缺陷及其特性的有效手段,开展氧化锌压敏电阻片的TSC特性研究对于研制高性能氧化锌电阻片有重要意义。开展氧化锌压敏电阻片的热释电电流以及不同极化电压、不同极化时间、不同极化温度和不同升温速率条件下的TSC特性的试验研究,并根据测试结果分析不同试验条件下氧化锌压敏电阻的陷阱电荷量、陷阱能级等的变化情况,初步认为在所研究温度范围内的TSC是通过陷阱电子表现出来的。在上述试验分析的基础上,确定一种合适的氧化锌压敏电阻TSC试验参数,为后续研究提供参考。The thermally stimulated current（TSC） technique is a powerful method for studying the defects and their behaviors of various dielectrics,it is valuable to study the TSC characteristics of ZnO varistor for developing high performance ZnO varistor.This paper mainly investigated the pyroelectric current of ZnO varistor and the TSC of ZnO varistor under varied polarizing voltages,polarizing temperatures,polarizing time and heating rates.Based on the experimental results,the trapped charges and trap levels of ZnO varistor were also analyzed.Moreover,it was thought that the TSC could be attributed to the movement of trapped electrons.At last,a set of test parameters for TSC test of ZnO varistor has been proposed,and this would be basic for the further study on the TSC characteristics of ZnO varistor.

关 键 词：电介质 热刺激电流 载流子 陷阱电荷 氧化锌压敏电阻 热释电电流 

分 类 号：TM85[电气工程—高电压与绝缘技术]