电极材料表面改性对聚乙烯内空间电荷注入的影响

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赵文博， 郝春成*， 于庆先

(青岛科技大学 材料科学与工程学院, 山东 青岛 266042)

 摘要： 采用磁控溅射法在铜片上镀Cr，Mo膜，用扫描电子显微镜（SEM）分析铜片上Cr膜和Mo膜的表面形貌。将镀Cr，镀Mo铜做电极，半导电层与交联聚乙烯（XLPE）样片组合为复合结构。采用电声脉冲法（PEA）测量XLPE内空间电荷分布情况，与铜做电极时聚乙烯内空间电荷比较，发现：电场强度分别为10，30，50 kV·mm-1时，铜电极镀Cr改性对抑制空间电荷效果不明显；镀Mo铜做电极时在外部场强为50 kV·mm-1时，在阴极附近，注入XLPE样品内部的空间电荷量小于铜做电极时的电荷量。所以镀Mo铜做电极有利于抑制空间电荷注入。

关键词： 电极材料; 交联聚乙烯; 空间电荷; 电声脉冲法

中图分类号：TM 215                      文献标志码： A

Effect of Space Charge Injection in PE by  Modification of Electrode Surface

 ZHAO Wenbo, HAO Chuncheng, YU Qingxian

(College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China）

Abstract: Magnetron sputtering method was utilized to coat the copper with Cr andMo.The surface topography of the Cr and Mo film on copper was analyzed by scanning electron microscopy (SEM).Crcoated copper and Mocoated copper were used as electrodes, semi conductive layer and the XLPE sample were combined into a composite structure. Space charge injection in XLPE was measured by Pulsed ElectroAcoustic (PEA). Results show that when the field strength is 10, 30, 50 kV·mm-1, the copper electrode coated with Mo has little effect on the inhibition of the space charge. However, at 50 kV·mm-1，in the vicinity of the cathode, the space charges within the sample is less than the amount of charge of Cu electrode. To conclude, the injection of space charge from the Moplated copper electrode has been restrained.

Key words: electrode materials; crosslinked polyethylene (XLPE); space charge; Pulsed ElectroAcoustic (PEA)

收稿日期：  20140729

基金项目：  国家自然科学基金项目(51077075);山东省自然科学基金项目（ZR2014EEM006）.

作者简介： 赵文博(1991—），男，硕士研究生.           *通信联系人.

文章编号：16726987（2015）05049704； DOI： 10.16351/j.16726987.2015.05.005