用电子束辐照注入电荷包研究低密度聚乙烯中的电荷迁移率  

Behavior of Space Charge Packet in Low-Density Polyethylene Injected by Electron Beam Irradiation

作　　者：郭世忠[1] 张冶文[1,2] 赵晖[1] 郑飞虎[2] 安振连[2] 

机构地区：[1]上海市特殊人工微结构材料与技术重点实验室,上海200092 [2]同济大学电气工程系,上海201804

出　　处：《电工技术学报》2016年第10期145-150,共6页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51077101;51277133);教育部博士点基金(20130072110046)资助项目

摘　　要：通过研究外加电场强度50k V/mm以下低密度聚乙烯中的空间电荷包行为,使用一种多层结构的受辐照的双面粘贴聚氟乙烯薄膜低密度聚乙烯样品,通过电子束辐照在样品内部形成＂波包＂分布,在外加电场强度较低时形成电荷包,使用激光压力波法监测电荷包迁移。结果表明,以电荷包峰值位置为参考点,在样品内实际电场下电荷包平均迁移率分布范围为（0.17～3.01）×10？15m2/（V·s）。通过对不同外加电场强度下的空间电荷包行为的研究得到,电荷包迁移速率与电场强度关系符合负微分迁移率假设模型,从而证明了在较低的电场强度下负微分迁移率模型的正确性。The specimen was hot-pressed with polyvinyl fluoride（PVF） films on the double sides of LDPE sample, and was irradiated by electron beam to form a packet-like distribution of space charge. The experiments measured the space charge distribution in irradiated multi-layer specimens using laser induced pressure pulse（LIPP） method at fields lower than 50 k V/mm. The space charge packets were observed in irradiated low density polyethylene（LDPE） specimens double-sided with PVF films on double sides. The range of the average mobility of packets at a range of（0.17～3.01）×10？15m2/（V·s） under calibration local field. Experiments under different applied electric fields, and the relationship between charge packet migration velocity and applied field, and the relationship is in accordance with the distribution curve predicted by negative differential mobility model, these results prove that the negative differential mobility model is correctness under the lower applied electric field.

关 键 词：低密度聚乙烯 聚氟乙烯 电子束辐照 空间电荷包 负微分迁移率 

分 类 号：TM215.1[一般工业技术—材料科学与工程]