电极材料表面改性对聚乙烯内空间电荷注入的影响  

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

作　　者：赵文博[1] 郝春成[1] 于庆先[1] 

机构地区：[1]青岛科技大学材料科学与工程学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2015年第5期497-500,共4页Journal of Qingdao University of Science and Technology:Natural Science Edition

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

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10,30,50kV·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50kV·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。Magnetron sputtering method was utilized to coat the copper with Cr and Mo.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 10,30,50kV·mm^-1,the copper electrode coated with Mo has little effect on the inhibition of the space charge.However,at 50kV·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.

关 键 词：电极材料 交联聚乙烯 空间电荷 电声脉冲法 

分 类 号：TM215[一般工业技术—材料科学与工程]