环氧树脂/微纳米α-氧化铝复合材料电气性能和热性能  

Electrical and Thermal Properties of Micro/Nanoα-Alumina/Epoxy Resin Composite

作　　者：王好盛[1] 张冬海[1] 薛杨[1] 张婧坤[1] 陈赟[1] 邬瑞文 陈运法[1] 

机构地区：[1]多相复杂系统国家重点实验室,中国科学院过程工程研究所,北京100190

出　　处：《塑料》2016年第1期16-19,共4页Plastics

基　　金：科技部重大科学研究计划(863)(2013AA031803)

摘　　要：采用熔融浇注法制备新型GIS用环氧树脂/微纳米α-氧化铝(α-Al_2O_3)绝缘复合材料,运用扫描电子显微镜(SEM)观察复合材料形貌,运用介电强度测试仪、介质损耗测试仪、动态机械热分析仪等研究微纳米α-Al_2O_3对材料电气性能和热性能的影响。结果表明:微纳米α-Al_2O_3复合颗粒提高了环氧树脂材料的威布尔击穿强度,耐击穿稳定性以及玻璃化温度,降低了介电常数,但是对热导率影响不大,这主要归因于纳米α-Al_2O_3和环氧基体间界面作用。Epoxy/micro/nanoα-aluminainsulation composite were prepared by melting casting method. The morphology ot composite were observed by scanning electron microscopy（SEM） and the effect of microα/nano-alumina on the electrical and thermal properties of composite were investigated by dielectric strength tester, dielectric loss measurement apparatus and dynamic mechanical thermal analyzer. The results showed that micro/nanoα-alumina composite particles improved the Weibull breakdown strength,brokedown strength distribution,glass transition temperatureand dielectric constant,but had little effect on the thermal conductivity. It was attributed to the strong interfacial interaction between nano-AI2O3 and epoxy matrix. On the one hand, it limited the epoxy molecular chain and reduced the carrier density which lead to improved insulation properties and heat resistance properties. On the other hand, it almost showed no effect on the thermal conductivity due to interfacial thermal resistance.

关 键 词：环氧树脂 微纳米α-Al2O3 界面 击穿强度 热导率 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]