Electrical-field induced nonlinear conductive behavior in dense zirconia ceramic
Electrical-field induced nonlinear conductive behavior in dense zirconia ceramic
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致密氧化锆陶瓷中电场引起的非线性导电行为
DOI：
10.1016/j.jmst.2017.03.005
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发表时间：
2017
影响因子：
10.9
通讯作者：
An Linan
中科院分区：
文献类型：
--
作者：
Gao Yan;Liu Fangzhou;Liu Dianguang;Liu Jinling;Wang Yiguang;An Linan
通过测量氧化锆陶瓷在不同温度下的初始电流-电压曲线，研究了外加电场对氧化锆陶瓷导电行为的影响。结果表明，当电场强度高于闪速烧结阈值时，曲线呈现非线性行为，即在线性电流的基础上增加一个附加电流，这符合欧姆定律。分析其输运行为表明，额外的电流密度是由于电场诱导的额外的氧空位。额外空位和伴随电流的形成率与电场强度有关。
The effect of the applied electric field on the conductive behavior of zirconia ceramics is studied by measuring its initial current-voltage curve at various temperatures. The results show that when the field strength is higher than the threshold for flash-sintering, the curves exhibit a nonlinear behavior by having an additional current on top of the linear current according to Ohm’s law. Analyzing its transport behavior reveals that the additional current density is due to the extra oxygen vacancies induced by the electric field. The formation rate of the extra vacancies and associated current was related to the field strength.