Electrical-field induced nonlinear conductive behavior in dense zirconia ceramic
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2017年第8期
论文作者：Yan Gao Fangzhou Liu Dianguang Liu Jinling Liu Yiguang Wang Linan An
文章页码：897 - 900
摘 要：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.
Yan Gao1，Fangzhou Liu2，Dianguang Liu2，Jinling Liu1，Yiguang Wang2，Linan An3
1. State Key Laboratory of Traction Power, School of Mechanics and Engineering, Southwest Jiaotong University2. School of Materials Science and Engineering, Northwestern Polytechnical University3. Department of Materials Science and Engineering, Advanced Materials Processing and Analysis Center, University of Central Florida
摘 要：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.
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