摘要
针对饱和电抗器浇注用环氧树脂在受到电应力及机械振动时易出现老化开裂的问题,需要在保持其优良绝缘、抗腐蚀性能的基础上改善其力学性能及热学性能。本文以功能优化设计为原则,先通过热处理在碳化硅晶须(SiCw)表面形成二氧化硅介电层得到SiCw@SiO_(2),然后利用掺杂改性的方法制备SiCw@SiO_(2)/EP复合电介质,并对其介电性能、力学性能以及导热性能进行测试。结果表明:SiCw@SiO_(2)/EP复合电介质兼具高介电常数及低介质损耗,韧性也得到改善,且由于SiCw相互接触形成了连续导热网络,SiCw@SiO_(2)/EP复合电介质的导热系数相比纯环氧树脂提高了117%。
The epoxy resin for casting in saturated reactors is prone to ageing and cracking when subjected to electrical stress and mechanical vibration,it is necessary to improve its mechanical and thermal properties on the basis of maintaining its excellent insulating properties and corrosion resistance.In this paper,taking the functional optimization design as principle,a silicon dioxide dielectric layer was formed on the surface of silicon carbide whiskers(SiCw)by heat treatment to obtain SiCw@SiO_(2).Then a SiCw@SiO_(2)/EP composite dielectric was prepared by doping modification,and its dielectric properties,mechanical properties,and thermal properties were tested.The results show that the SiCw@SiO_(2)/EP composite dielectric has both high dielectric constant and low dielectric loss,and its toughness is also improved.Due to the continuous thermal conductivity network formed by the contact of SiCw,the thermal conductivity of the SiCw@SiO_(2)/EP composite dielectric increases by 117%than that of pure epoxy resin.
作者
廖文龙
杨玥坪
魏华超
闫志江
张榆
任俊文
LIAO Wenong;YANG Yueping;WEI Huachao;YAN Zhijiang;ZHANG Yu;REN Junwen(State Grid Sichuan Electric Power Research Institute,Chengdu 610000,China;College of Electrical Engineering,Sichuan University,Chengdu 610065,China;College of Electrical Engineering,Xi′an Jiaotong University,Xi′an 710049,China)
出处
《绝缘材料》
CAS
北大核心
2024年第5期42-48,共7页
Insulating Materials
基金
中国博士后科学基金项目(2018M643475)
电力设备电气绝缘国家重点实验室开放基金(EIPE23210)
四川省重点研发项目(2023YFG0236)。
关键词
环氧树脂
碳化硅晶须
韧性
热导率
介电性能
epoxy resin
silicon carbide whiskers
toughness
thermal conductivity
dielectric properties
