The Effect of Aluminum on Electrical Properties of ZnO Varistors
The Effect of Aluminum on Electrical Properties of ZnO Varistors
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DOI：
10.1111/j.1551-2916.2010.03787.x
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发表时间：
2010-09
影响因子：
3.9
通讯作者：
Wangcheng Long;Jun Hu;Jun Liu;Jinliang He;R. Zong
中科院分区：
文献类型：
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作者：
Wangcheng Long;Jun Hu;Jun Liu;Jinliang He;R. Zong
本文重点研究铝添加剂对ZnO压敏电阻电性能的影响。从归一化电流密度与电场（J-E）曲线来看，Al离子添加剂对样品漏电流和残余电压比的影响非常直观。晶界势垒高度随Al掺杂量的增加而减小，但施主密度先增大后减小，当Al离子添加量为0.25%时达到最大值。残余电压比随ZnO晶粒尺寸的不均匀性而变化。进一步分析了残压比的影响因素。
This paper focuses on the effect of aluminum additive on electrical properties of ZnO varistors. From the normalized current density versus electric field (J–E) curves, the influence of Al ionic additive on the leakage current and the residual voltage ratio of the sample is very intuitive. The barrier height of the grain boundary decreases with an increase in the Al dopant, but the donor density increases first and then decreases, which reaches the maximum while Al ionic 0.25% is added. The residual voltage ratio changes with the unevenness of ZnO grain sizes. Furthermore, the influence factors of the residual voltage ratio are analyzed.