聚合物纳米复合电介质的击穿性能

发布时间：2018-02-15 00:28

本文关键词： 聚合物纳米复合电介质击穿沿面闪络电荷输运　出处：《电工技术学报》2017年16期 　论文类型：期刊论文

【摘要】：聚合物纳米复合电介质作为第三代绝缘材料表现出优异的电气特性,其中击穿是纳米复合电介质的关键性能之一。很多研究表明纳米复合电介质的击穿性能明显优于纯聚合物和微米复合电介质材料。针对第一代纳米复合电介质的国内外研究现状,综述了其击穿性能(包括体击穿和沿面闪络特性),讨论了纳米复合电介质击穿特性改善的机理。基于国内外研究现状和本课题组的研究积累,提出了自由体积对聚合物纳米复合电介质击穿的重要影响,指出了纳米粒子对聚合物基体自由体积参数的影响规律;研究了电荷输运微观过程对纳米复合电介质击穿的影响机制,阐述了陷阱参数与体击穿和沿面闪络性能的关系;总结了纳米改性与复合材料体和表面电荷输运参数调控的关联,指出了纳米掺杂同时改善聚合物介质体击穿和沿面闪络特性的机理。
[Abstract]:As the third generation insulating material, polymer nanocomposite dielectric exhibits excellent electrical properties. Among them, breakdown is one of the key properties of nano-composite dielectric. Many researches show that the breakdown performance of nano-composite dielectric is obviously superior to that of pure polymer and micron composite dielectric. Current research situation at home and abroad, The breakdown properties (including bulk breakdown and flashover characteristics along the surface) are reviewed, and the mechanism of improving the breakdown characteristics of nano-composite dielectric is discussed. Based on the current research situation at home and abroad and the research accumulation of our research group, the mechanism of improving the breakdown characteristics of nanocrystalline composite dielectrics is discussed. The influence of free volume on the breakdown of polymer nanocomposite dielectric is proposed, and the influence of nanoparticles on the free volume parameters of polymer matrix is pointed out. The influence mechanism of charge transport microscopic process on the breakdown of nano-composite dielectric was studied, the relationship between trap parameters and bulk breakdown and flashover properties along the surface was discussed, and the relationship between nano-modification and the control of surface charge transport parameters of composite materials was summarized. The mechanism of nanocrystalline doping to improve the breakdown and flashover characteristics of polymer dielectric was pointed out.
【作者单位】：电力设备电气绝缘国家重点实验室(西安交通大学);
【基金】：国家自然科学基金重点项目(51337008);国家自然科学基金项目(51221005)资助
【分类号】：TM21

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