摘要
研究了微量Nd2O3添加剂对氧化锌压敏阀片的压敏电位梯度的影响,并对其微观组织进行了分析研究,从理论上探讨了Nd2O3影响氧化锌压敏阀片压敏电位梯度与组织的机理.研究结果表明,在0 mol%～0.04 mol%成分范围内,随着Nd2O3含量的增加,氧化锌压敏阀片的压敏电位梯度明显提高;当Nd2O3含量超过0.04mol%时,随其含量的增加,氧化锌压敏阀片的压敏电位梯度又呈降低趋势.其原因是Nd2O3加入到氧化锌压敏阀片中,使晶粒尺寸减小所致.
The effect of Nd2O3 on voltage and microstructure of ZnO varistor was studied. and a theoretical analysis of the mechanism of the effect was conducted. The results show that the voltage of ZnO varistor increases with the increase of Nd2O3; content in the rang: of 0 mol%similar to0.04 mol%. But when the content of Nd2O3 is more than 0.04 mol%, the voltage of ZnO varistor decreases with the increase of the content. The microstructure analysis indicates that the minimal additive exists in ZnO grain boundary in the form of a new compound and hinders the movement of grain boundary, which reduces the size of ZnO grain size and makes the grain more uniform. and as a result. Nd2O3 improve the voltage of the varistor greatly.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2005年第1期154-157,共4页
Rare Metal Materials and Engineering
