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热烈庆祝博士生蔺家骏的文章被欧陶（J. Euro. Ceram. Soc）正式接收。

【论文信息】

 论文题目：Zinc interstitial as a universal microscopic origin for the electrical degradation of ZnO-based varistors 

                   under the combined DC and temperature condition

 论文作者：Jiajun Lin（蔺家骏）, Shengtao Li（李盛涛）, Jinqiang He（何锦强）, Le Zhang（张乐）, Wenfeng  

                   Liu（刘文凤）, and Jianying Li（李建英）

 论文摘要：The electrical degradation of four different commercial ZnO-based varistors under the combined DC

                   bias and high temperature condition was investigated with XRD, SEM, I-V, impulse current

                   measurement, and dielectric spectroscopy, respectively. Contrary to the negligible structural changes, 

                            the electrical properties vary significantly after the degradation from sample to sample. Those      

                  deviations could not be completely ascribed to the differences in fabrication, but instead be consistently

                  explained in terms of the intrinsic defect structure of ZnO ceramics. With a detailed analysis of their

                  dielectric spectra in broad temperature and frequency ranges, it was found that zinc interstitial is the

                  main intrinsic defect species responsible for the observed electrical degradation and its density could be

                  used as a ``universal" microscopic parameter to characterize the macroscopic electrical degradation. In

                  addition, depending on the conduction mechanism, the role taken by Zn_i also differs correspondingly.

【欧陶简介】

The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Impact Factor: 2.933 （2015）.

                                                                                                                                                                                文字/编辑：Leon