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我的新闻发布时间：2021-12-05
文章标题：恭喜课题组硕士生王瑶的文章被Materials接收
内容：
恭喜硕士生王瑶的文章“Simultaneously Enhanced Potential Gradient and Nonlinearity of ZnO Varistor Ceramics by MnO Doping with Nano-sized ZnO Powders”被Materials接收！
ZnO varistor ceramics with high potential gradient as well as high nonlinear coefficient were reported and analyzed in this paper. With the use of nano-sized ZnO powders, the average grain size was reduced to about 2.6 m, which successfully raised the potential gradient up to 1172 V/mm. Moreover, the nonlinear coefficient was improved to 48 and the leakage current was decreased to 8.4 uA/cm2 by doping moderate amount of MnO (0.9 mol%). This was proved to arise from the high Schottky barrier height formed at grain boundary, where the Mn element segregated and consequently led to the increased density of interface states. Therefore, this could be considered as a potential method to simultaneously enhance the potential gradient and the nonlinear coefficient of ZnO varistor ceramics.
