期刊论文

Progress in Development of High Grade ZnO Varistor

中文

电瓷避雷器

1003-8337

2008

3

22-26+31

10.16188/j.isa.1003-8337.2008.03.008

本校为第一机构

综述了氧化锌电阻片的导电机理、老化机理、添加剂以及制备工艺等方面的研究进展,并从三方面指出了高性能氧化锌电阻片的发展趋势.①提高ZnO粉体的质量.如制备纯度高、粒径分布好、易于分散的纳米ZnO粉体.特别是将其他掺杂成分如Bi2O3等在制粉过程引入,制备纳米复合粉末,将可从根本上改善掺杂成分的均匀性.从而大幅度地提高氧化锌电阻片的性能;②采用新的烧结工艺,如微波或微波等离子烧结氧化锌电阻片,已展示良好的应用前景,但还存在工艺控制稳定性和规模化生产等问题.因此,应进一步探讨和完善新的烧结工艺,以降低烧结能耗,提高烧成质量和产品合格率;③开发高电位梯度的氧化锌电阻片是电网系统用...

The author describes mechanism of conductivity and ageing of ZnO varistor, investiga- tion progress in its processing, and trend of high grade ZnO varistor. 1. Enhancement of ZnO powder quality grade using easy dispersed nanometric ZnO powder of high purity and well distributed size, dosing Bi203, etc in powder preparating process. Preparation of nanometric composite powder may con- siderably improve dosing homogeneity and thus enhance varistor grade. 2. Application of new prospec- tive sintering technology such as microwave or microwave plasma sintering process. But still it has to enhance te...