Co_2O_3掺杂对SnO_2-Ni_2O_3-Nb_2O_5系压敏材料性能的影响  

Effect of Co_2O_3 on the electrical nonlinearity of SnO_2-Ni_2O_3-Nb_2O_5 varistors

作　　者：李长鹏[1] 王矜奉[1] 陈洪存[1] 苏文斌[1] 钟维烈[1] 张沛霖[1] 

机构地区：[1]山东大学物理系,山东济南250100

出　　处：《功能材料》2001年第6期632-634,共3页Journal of Functional Materials

基　　金：山东省自然科学基金资助项目

摘　　要：研究并分析了Ni3 + 掺杂和Co2 + 掺杂对SnO2 压敏电阻致密度和电学非线性性能的影响。研究了掺Co3 + 对SnO2 Ni2 O3 Nb2 O5压敏材料性能的影响。实验结果表明 ,Co2 O3 在高温下可转变为CoO。Co2 + 的掺入不仅能够增大SnO2 Ni2 O3 Nb2 O5材料的质量密度 ,而且能提高非线性系数 ,在较大程度上提高了SnO2 MgO Nb2The reason that the (Ni, Nb) doped SnO 2 varistors exhibits a poorer densification and electrical nonlinearity than the (Co, Nb) doped SnO 2 varistors was explained. The effect of Co 2O 3 on the electrical nonlinear properties of SnO 2 based ceramics were investigated. The introduction of Co 3+ can be transformed into Co 2+ at a high temperature (950℃). The ions of Co 2+ can enter into the lattice and substitute Sn 4+ , which increase the densities and the electrical nonlinearities of the samples.

关 键 词：压敏材料 二氧化锡 氧化钴 电学性能 

分 类 号：TN304.93[电子电信—物理电子学]