纳米SiO_2改性环氧树脂复合材料的介电性能研究  

The Dielectric Properties of Epoxy Insulating Impregnating Varnish Modified by Nano-Silica

作　　者：华聪聪 陈昊[1,2] 杨瑞宵 范勇[1] 郭佳[1] HUA Cong-cong;CHEN Hao;YANG Rui-xiao;FAN Yong;GUO Jia(School of Material Science and Engineering,Harbin University of Science and Technology,Harbin 150040,China;Suzhou Jufeng Electrical Insulating System Co.,Ltd,Suzhou 215214,China)

机构地区：[1]哈尔滨理工大学材料科学与工程学院,黑龙江哈尔滨150040 [2]苏州巨峰电气绝缘系统股份有限公司,江苏苏州215214

出　　处：《哈尔滨理工大学学报》2018年第3期51-55,共5页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(51277044)

摘　　要：以精馏环氧作为树脂基体,制备了不同掺杂量的纳米SiO_2/环氧树脂浸渍漆,经高温固化后得到环氧树脂复合材料。利用透射电子显微镜(TEM)表征纳米粒子在复合材料中的分散情况,通过击穿电压测试仪、数字高阻计和介损及介电常数测量系统对复合材料的介电性能进行测试,研究纳米SiO_2的掺杂量对复合材料介电性能的影响。结果表明,纳米SiO_2在环氧树脂基体中分布均匀,大多数颗粒直径分布在60 nm左右;加入SiO_2纳米粒子至8%后复合材料击穿场强可达23.46 k V/mm,比未掺杂的复合材料提高了5.4%;对体积电阻率的影响不大;当纳米质量分数小于20%时,工频下的介电常数(ε)在常温下变化不大,在155℃下,当质量分数大于15%以后才随掺杂量有明显变化;工频下的介质损耗(tanδ)在常温下几乎不变,在155℃下随掺杂量的增大而增大。The epoxy insulating impregnating varnish modified by nano-Silica was prepared with different doping amount and transformed to epoxy resin composite by heating. Transmission electron microscope were used to investigate the dispersion. The dielectric properties were characterized and the effects of doping amount of nanoSilica on the dielectric properties of composite were discussed. The results showed that the nano-Silica was dispersed well in the epoxy resin. When the amount of nano-Silica was 8%,the breakdown strength reached the maximum of 23. 46 k V/mm,which was increased by 5. 4% compared with undoped material. volume resistivity was little changed. Under the condition of power frequency,the dielectric constant and dielectric loss were little changed in the room temperature and increased with the increase of nano-Silica at 155℃.

关 键 词：环氧树脂 绝缘浸渍漆 纳米SIO2 介电性能 

分 类 号：TM215.3[一般工业技术—材料科学与工程]