Effects of Fe and Al co-doping on the leakage current density and clamp voltage ratio of ZnO varistor
Effects of Fe and Al co-doping on the leakage current density and clamp voltage ratio of ZnO varistor
复制标题
Fe、Al共掺杂对ZnO压敏电阻漏电流密度和钳位电压比的影响
DOI：
10.1016/j.jallcom.2018.03.106
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发表时间：
2018-05
影响因子：
6.2
通讯作者：
Jiang Shenglin
中科院分区：
文献类型：
--
作者：
Shen Jinlou;Zhang Yujing;Li Mingyu;Bao Runxi;Shen Meng;Huang Chi;Zhang Guangzu;Ke Yabing;Li Honglang;Jiang Shenglin
研究了铁、铝离子共掺杂对ZnO基压敏电阻器的相演变、显微结构、伏安特性和钳位特性的影响。X射线衍射（XRD）分析表明，Fe-Al共掺杂陶瓷中没有引入附加相和衍射峰位移。能谱分析表明，加入的Fe ~（3+）和Al ~（3+）大部分渗入到ZnO晶粒中。这种渗透显著增加了ZnO晶粒的尺寸，导致击穿场的显著降低。此外，与单掺Al 3+样品相比，Fe 3+和Al 3+共掺杂样品的非线性系数和漏电流密度都有显著提高。特别是当Fe 3+和Al 3+的添加量分别达到0.014mol%和0.028mol%时，非线性系数的提高率和漏电流密度的衰减率达到最佳。同时，该样品具有最佳施主密度Nd，这是导致样品在脉冲电流冲击下钳位电压比达到最低值的主要原因。研究表明，最佳Fe/Al比的共存有利于制备出具有优良电性能、低箝位电压和高保护效果的ZnO压敏电阻。
The effects of ferrum and aluminum ions co-doping on the phase evolution, microstructure, current-voltage characteristics and clamp characteristic of ZnO-based varistors were investigated. X-ray diffraction (XRD) analyses verify that Fe-Al co-doping in ceramic doesn't induce the presence of additional phase and diffraction peak shift. And the energy dispersive spectrometer (EDS) analyses demonstrate that most of the added Fe3+and Al3+penetrate into ZnO grains. This permeation significantly increases the sizes of ZnO grains, resulting in the noticeable decrease of the breakdown field. Additionally, the nonlinear coefficient and leakage current density were remarkably improved via the co-doping of Fe3+and Al3+in comparison to the single Al3+doped sample. In particular, when the additive amount of Fe3+and Al3+reach to 0.014 mol% and 0.028 mol% respectively, the raised rate of nonlinear coefficient and the attenuation rate of leakage current density reach to the optimum. Meanwhile, this sample possesses the optimal donor densityNd, which is mainly responsible for the result that the clamp voltage ratio of sample obtains the lowest value under pulse current surge. This work reveals that the coexistence of an optimal Fe/Al ratio contributes to preparing the excellent ZnO varistor with the excellent electrical properties, low clamping voltage and high protective effect.
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影响因子：
1.9
作者：
F. Stucki;P. Brüesch;F. Greuter
通讯作者：
F. Stucki;P. Brüesch;F. Greuter
影响因子：
3.9
作者：
C. Nahm
通讯作者：
C. Nahm
影响因子：
3.2
作者：
C. Shirley;W. Paulson
通讯作者：
C. Shirley;W. Paulson
影响因子：
3.9
作者：
Wangcheng Long;Jun Hu;Jun Liu;Jinliang He;R. Zong
通讯作者：
Wangcheng Long;Jun Hu;Jun Liu;Jinliang He;R. Zong
DOI：
10.1111/j.1151-2916.1990.tb05232.x
发表时间：
1990-07-01
影响因子：
3.9
作者：
GUPTA, TK
通讯作者：
GUPTA, TK