纳米掺杂交联聚乙烯复合材料的空间电荷特性研究  

Study on space charge characteristics of nano-doped cross-linked polyethylene composites

作　　者：倪艳荣 郭永亮 李承斌 高俊国[2] NI Yanrong;GUO Yongliang;LI Chengbin;GAO Junguo(Henan Key Laboratory of Wire and Cable Structures and Materials,School of Cable Engineering,Henan Institute of Technology,Xinxiang 453000,China;Key Laboratory of Engineering Dielectrics and Its Application,Ministry of Education,Heilongjiang Provincial Key Laboratory of Dielectric Engineering,College of Electrical and Electronic Engineering,Harbin University of Science and Technology,Harbin 150080,China)

机构地区：[1]河南工学院电缆工程学院,河南省线缆结构与材料重点实验室,河南新乡453000 [2]哈尔滨理工大学电气与电子工程学院,工程电介质及其应用教育部重点实验室,黑龙江省电介质工程重点实验室,黑龙江哈尔滨150080

出　　处：《绝缘材料》2023年第3期33-40,共8页Insulating Materials

基　　金：国家自然科学基金资助项目(11904081);河南省科技攻关项目(222102230062);河南省高等学校青年骨干教师培养项目(2019GGJS267);新乡市科技攻关项目(GG2020013)。

摘　　要：空间电荷累积容易引起交联聚乙烯绝缘内部电场畸变,从而导致绝缘老化甚至失效,而纳米掺杂或改性可以抑制空间电荷的累积,因此得到了广泛的关注。本文测量了二氧化硅和氧化镁纳米填料掺杂交联聚乙烯复合材料的空间电荷特性和电导特性,并结合带隙理论模型分析纳米填料的作用机制。结果表明:相比于二氧化硅掺杂的交联聚乙烯复合材料,氧化镁掺杂的交联聚乙烯复合材料具有较高的介电常数、较低的空间电荷积聚程度和较小的电导率。The accumulation of space charge is easy to cause the internal electric field distortion of cross-linked polyethylene insulation, resulting in insulation ageing and even failure. Nano-doping or modification can inhibit the accumulation of space charge, so it has received widespread attention. In this paper, the space charge properties and electrical conductivity properties of cross-linked polyethylene composite doped by silica and magnesium oxide nano filler were measured, and the action mechanism of nanofillers was analyzed combined with the theoretical band gap model. The results show that the MgO-doped cross-linked polyethylene composites have higher dielectric constant, lower space charge accumulation, and smaller electrical conductivity compared to silica-doped cross-linked polyethylene composites.

关 键 词：交联聚乙烯 纳米掺杂 空间电荷 电导率 带隙理论 

分 类 号：TM215[一般工业技术—材料科学与工程]