Formation and migration of space charge packet in low density polyethylene

作     者：ZHENG Feihu 1 , ZHANG Yewen 1 , GONG Bin 1 , ZHU Jianwei 1 & WU Changshun 2 1. Pohl Institute of Solid State Physics, Tongji University, Shanghai 200092, China 2. China National Center for Quality Supervision and Test of Electric Ware and Cable, Shanghai 200093, China 

作者机构：1. Pohl Institute of Solid State Physics Tongji University 200092 Shanghai China 2. China National Center for Quality Supervision and Test of Electric Ware and Cable 200093 Shanghai China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2005年第48卷第3期

页      面：354-360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：This work was supported by the National Natural Science Foundation of China(Grant No.50277026) theKey Program of Minis try of Education of China(Grant No.02100) the 973 Project of Ministry of Science and Technology of China(Grant No.2001CB610406) 

主　　题：solid dielectric,low-density polyethylene,space charge packet,trap. 

摘      要：Pressure wave propagation (PWP) method was utilized to observe the space charges packet-like behavior in sheet samples of low-density polyethylene (LDPE) under the relative low electric field. The experimental results show that space charge packets are always generated at the anode and move across the sample to the cathode regardless of the polarity of DC voltage. This paper discusses the migration of space charge packets at 30–40°C, the possible charge resource of space charge packets carriers and trap level of the space charge.