ZnO籽晶对ZnO-Bi₂O₃-TiO₂-Sb₂O₃系陶瓷微观结构和压敏性能的影响

来源期刊：中国有色金属学报2000年第z1期

论文作者：徐庆 陈文 袁润章

文章页码：69 - 72

关键词：ZnO-Bi₂O₃-TiO₂-Sb₂O₃系陶瓷； ZnO籽晶； 晶粒生长； 压敏性能

Key words：ZnO-Bi₂O₃-TiO₂-Sb₂O₃ system ceramics； ZnO seed grains； grain growth； varistor properties

摘    要：研制了添加预制ZnO籽晶的ZnO-Bi₂O₃-TiO₂-Sb₂O₃系压敏陶瓷 ,测量了添加不同含量籽晶的ZnO陶瓷的压敏电压 (V1mA)、非线性系数 (α)和漏电流 (IL)等电学性能参数 ,采用XRD和SEM研究了籽晶对ZnO压敏陶瓷微观结构的影响。研究结果表明 ,籽晶的含量对晶粒的生长状况以及Ti⁴⁺离子的分布状况都具有显著的影响 ,当ZnO籽晶添加量为10%时可获得压敏性能最为优化的ZnO陶瓷。

Abstract: Varistor ceramics of ZnO-Bi₂O₃-TiO₂-Sb₂O₃ system introduced with different contents of pre-fabricated ZnO seed grains have been fabricated. The varistor voltage （V₁*!mA）, nonlinear coefficient （α） and leakage current （I_L） of the ceramics were measured, and the microstructure of the ceramics was investigated by means of XRD and SEM. The results show that both the grain growth and distribution of Ti⁴+ ions are significantly affected by the content of seed grains. The optimized varistor properties are obtained in ZnO ceramics containing 10% of seed grains, which exhibits the varistor voltage of 41.9 V/mm, the nonlinear coefficient of 23.9 and the leakage current of 7.1 μA.