中文摘要：

Al2O3填充环氧树脂,并用偶联剂KH560对Al2O3进行表面改性,通过溶液混合法制备不同添加量的Al2O3/环氧树脂复合材料。通过傅立叶变换红外光谱仪、扫描电子显微镜和Aglient 4294A阻抗分析仪对Al2O3/环氧树脂复合材料的微观结构和介电性能进行测试,结果表明表面改性的Al2O3在环氧树脂基体中具有更好的分散性,同时表面改性的Al2O3制备的复合材料的介电常数增加,介电损耗降低。采用静电场仿真软件模拟爆电电源中三相点附近电场分布,结果表明随着介电常数增加,三相点电场强度具有降低的趋势。

英文摘要：

Al2O3/epoxy composite was prepared by solution process after Al2O3 powder was modified by KH560 coupling agent.The impact of coupling agent on microstructure of composites was studied by FT-IR and SEM.The dielectric properties were measured by 4294A impedance analyzer.It was found that the interfacial of Al2O3 and KH560 forms chemical bonds.The coupling agent improves the interaction between Al2O3 and epoxy.Both the fraction of Al2O3 and KH560 have an important impact on dielectric property.Dielectric permittivity of the composite with treated Al2O3 was higher than that of composite with untreated Al2O3.Besides,the electric field intensity of cathode triple-point junction has been simulated by electrostatic field simulation.The result shows that Al2O3/epoxy composite increases dielectric properties between ceramic and epoxy as well as decreases the electric field intensity of cathode triple-point junction.