纳米SiO2对环氧树脂复合材料雷电冲击电压的影响  

Effect of Nano-SiO2 on Lightning Impulse Voltage of Epoxy Resin Composites

作　　者：程显[1,2] 李文博 陈硕[1,2] 杨征 韩书谟[3] 葛国伟 CHENG Xian;LI Wenbo;CHEN Shuou;YANG Zheng;HAN Shumo;GE Guowei(School of Electrical Engineering,Zhengzhou University,Zhengzhou 450001,China;Henan Engineering Research Center of Power Transmission&Distribution Equipment and Electrical Insulation,Zhengzhou 450001,China;State Grid Pinggao Group Co.,Ltd.,Pingdingshan 467000,China)

机构地区：[1]郑州大学电气工程学院,河南郑州450001 [2]河南省输配电装备与电气绝缘工程技术研究中心,河南郑州450001 [3]平高集团有限公司,河南平顶山467000

出　　处：《绝缘材料》2020年第6期13-20,共8页Insulating Materials

基　　金：国家电网公司总部科技项目(固体绝缘件绝缘水平监测和高可靠运行技术研究)。

摘　　要：以纳米SiO2改性环氧树脂制得SiO2/环氧树脂复合材料,并对改性前后环氧树脂复合材料的短时过电压耐受能力进行对比研究。结果表明:随着纳米SiO2掺杂量的增加,SiO2/环氧树脂复合材料的介电常数和介质损耗因数均呈先减小后增大的趋势,当纳米SiO2质量分数为3%时,改性效果最佳。根据U-N曲线,在常温下施加的雷电冲击电压幅值为50 k V时,掺杂SiO2质量分数为3%的环氧树脂复合材料累积至击穿的雷电冲击次数达1313次,是纯环氧树脂材料的3.23倍,研究结果可为提高环氧树脂短时过电压耐受能力设计提供参考。A SiO2/epoxy resin composite was prepared using nano-SiO2 to modify epoxy resin,and the short-term overvoltage withstand capability of the epoxy resin composite before and after modification were compared.The results show that with the increase of nano-SiO2 doping amount,the dielectric constant and dielectric loss factor of the SiO2/epoxy composites decrease at first and then increase,when the mass fraction of nano-SiO2 is 3%,the modification effect is the best.According to the U-N curve,when the lightning impulse voltage with 50 kV of amplitude was applied at room temperature,the lightning impulse cumulative number to breakdown of the epoxy resin composite with 3%of SiO2 is 1313,which is 3.23 times more than that of pure epoxy resin material.The research results can provide reference for the design of improving the short-term overvoltage withstand capability of epoxy resin.

关 键 词：环氧树脂 雷电冲击 纳米SIO2 介电性能 U-N特性 

分 类 号：TM215[一般工业技术—材料科学与工程]