Electrical-field induced nonlinear conductive behavior in dense zirconia ceramic

作     者：Yan Gao Fangzhou Liu Dianguang Liu Jinling Liu Yiguang Wang Linan An 

作者机构：State Key Laboratory of Traction PowerSchool of Mechanics and EngineeringSouthwestfiaotong UniversityChengdu 610031China School ofMateriais Sdence and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China Department ofMateriais Sdence and EngineeringAdvanced Materials Processing and Analysis CenterUniversity of Central FloridaOrlandoFL 32816USA 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2017年第33卷第8期

页      面：897-900页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by National Natural Science Foundation of China(Grant Nos.51372202,51402237,51532003,51602264) State Key Laboratory of Traction Power(Grand No.2015TPL Z01) 

主　　题：Flash sintering Non-linear conductivity Zirconia Electric field effect 

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.