ZnO籽晶对ZnO压敏陶瓷微观结构和电性能的影响

Effect of ZnO Seed Grains on Microstructure and Electric Properties of ZnO Varistor

本文研究了ＺｎＯ籽晶的制备，探讨了籽晶对ＺｎＯ压敏陶瓷材料微观结构及压敏电压、通流容量、非线性系数等电性能的影响．结果表明，通过掺加ＺｎＯ籽晶，可有效地控制材料中ＺｎＯ晶粒生长和材料微观结构，达到降低材料压敏电压和提高通流容量的目的．

The preparation of ZnO seed grains and the effect of ZnO seed grains on the microstructure and electric properties of ZnO varistor were studied.It is shown that the broad grain size distribution of a ZnO low voltage varistor due to discontinuous grain growth can be narrowed by introducing a large number of ZnO seed grains to the starting powder. The addition of the seed grains to the ceramic powder is an effective means of preventing the growth of single large grains, thus making the control of final grain size and electric properties much easier.