Al_2O_3/环氧树脂复合材料制备及对三相点电场的影响研究  

The effect of micro-Al_2O_3/epoxy composite on the electric field intensity of cathode triple-point junction

作　　者：田晶晶[1,2] 高刘德[2] 刘阳[2] 杜金梅[2] 刘剑[1] 贺红亮[2] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010 [2]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理重点实验室,四川绵阳621900

出　　处：《功能材料》2013年第13期1837-1841,共5页Journal of Functional Materials

基　　金：国家自然科学基金委员会和中国工程物理研究院联合基金资助项目(U1230116);四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地(西南科技大学)开放基金资助项目(11zxfk14)

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。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.

关 键 词：AL2O3 环氧树脂复合材料 偶联剂KH560 介电性能 三相点电场强度 

分 类 号：TB33[一般工业技术—材料科学与工程] TB34