ZnO-V2O5-MnO2中压体系压敏电阻的微观组织和电学性能

摘要

The effect of MnO2 and sintering temperature of ZVM-based medium-voltage varistors were investigated. The results indicate that the increase of the content of MnO2 is benefit to refining grains, increase breakdown voltage(VB , be measured at 1.0mA/cm2), increase non-ohomic value(α) amd improve electrical properties. Increasing sinter temperature can promote the grain growth of ZVM-based ceramics, improve density, increase a and reduce VB. Medium-voltage ZVM-based varistor can be acquired through the control of MnO2 and sintering temperature.%研究了中压体系ZnO-V2O5 -MnO2 (ZVM)压敏电阻的微观组织和电学性能.结果表明,MnO2含量增加有利于细化ZVM陶瓷晶粒,改善电性能,提高压敏电压；提高烧结温度可以促进ZVM陶瓷晶体生长,改善致密度,降低压敏电压,提高非线性系数.中压体系ZVM陶瓷可以通过控制MnO2含量以及烧结温度获得.