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La2O3掺杂对Zn–Pr基压敏陶瓷电学特性的影响
作者:刘建科1 3 徐亚宁2 3 曹文斌1 3 张瑞婷2 3  帆1 3  鑫2 3 乔毅楠2 3 
单位:(1. 陕西科技大学文理学院 西安 710021 2. 陕西科技大学材料科学与工程学院 西安 710021  3. 半导体材料与器件研究中心 西安 710021) 
关键词:氧化镧掺杂 氧化锌压敏陶瓷 非线性系数 阻频特性 介电特性 
分类号:TQ174
出版年,卷(期):页码:2020,48(3):0-0
DOI:
摘要:

 利用固相烧结法制备出了ZnO–Pr6O11–Co2O3–Cr2O3–La2O3氧化锌压敏陶瓷。研究了La2O3掺杂对氧化锌压敏陶瓷微观结构、压敏特性以及介电性能等方面的影响。结果表明:在La2O3掺杂量为1.5% (摩尔分数)时,氧化锌压敏陶瓷的综合性能最好,其晶粒尺寸最小且较为均匀,击穿场强达到最高(752 V/mm),非线性系数较大(12),晶界电容达到最大(276 pF),介电损耗较小。

 The ZnO–Pr6O11–Co2O3–Cr2O3–La2O3 varistors were prepared by solid state sintering method. The effect of La2O3 doping on the microstructure, varistor property, and dielectric characteristics of the ZnO varistor ceramics were studied in detail. The results show that the ZnO varistor has the best overall performance with La2O3 content of 1.5% (in mole fraction), the grain size is the smallest and uniform, the breakdown voltage E1Ma is the highest (752 V/mm), the nonlinear coefficient is large (12), the grain boundary capacitance is the largest (276 pF), and the loss tangent is relatively low.

基金项目:
国家自然科学基金(51272145,50972087)资助。
作者简介:
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