摘要
采用不同的烧结温度(900～1300℃)制备氧化锌压敏瓷,通过扫描电镜和X射线衍射对其显微组织和相成分进行了分析,探讨了烧结温度对氧化锌压敏瓷电性能和显微组织的影响机理。烧结温度越高,Bi2O3挥发越严重,氧化锌压敏瓷的晶粒尺寸越大,电位梯度越低。研究结果表明,当烧结温度为1100℃时,压敏瓷具有较为理想的综合电性能,其电位梯度为332V/mm,非线性系数为30,漏电流为0.1μA。
ZnO-Bi2O3 based varistor ceramics were sintered by using different sintering temperature,and the electrical properties and microstructure of the varisotr ceramics were studied in this paper.The results showed that the higher the sintering temperature,the more the Bi2O3 volatilized,and the larger the grains.When the sintering temperature is 1 100℃,ZnO-Bi2O3 based varistor ceramics exhibit comparatively ideal comprehensive electrical properties.The threshold voltage is 332 V/mm,the nonlinear coefficient is 30 and the leakage current is 0.1μA.
出处
《河南科技大学学报（自然科学版）》
CAS
北大核心
2009年第6期8-11,共4页
Journal of Henan University of Science And Technology:Natural Science
基金
上海市科委技术创新人才团队建设专项项目(06DZ05902)
关键词
压敏电阻
氧化锌
烧结温度
电性能
显微组织
Varistors
Zinc oxide
Sintering temperature
Electrical properties
Microstructure
