ZnO/EP复合材料的制备及其导热性能  

Preparation and Thermal Conductivity of ZnO/EP Composites

作　　者：刘蓉 陈果 李良锋[1] 高鹏飞 王玉平[1] LIU Rong;CHEN Guo;LI Liangfeng;GAO Pengfei;WANG Yuping(School of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]西南科技大学材料科学与工程学院,绵阳621010

出　　处：《硅酸盐通报》2021年第4期1370-1377,共8页Bulletin of the Chinese Ceramic Society

基　　金：四川省教育厅自然科学重点项目(17ZA0395);西南科技大学“龙山人才”资助项目(18LZX679);西南科技大学研究生创新基金(19ycx0023)。

摘　　要：采用溶胶-凝胶法制备纤锌矿型氧化锌(zinc oxide,ZnO)粉体,考察了煅烧温度对ZnO粉体质量的影响;将不同煅烧温度获得的ZnO填充于环氧树脂(epoxy resin,EP)得到系列ZnO/EP复合材料,采用红外光谱仪(Fourier transform infrared spectroscopy,FTIR)和场发射扫描电子显微镜(field emission scanning electron microscope,FESEM)对ZnO/EP复合材料进行结构和形貌表征,研究了ZnO粉体粒径及填充量对ZnO/EP复合材料导热性能的影响。结果表明,ZnO粉体粒径随煅烧温度升高而增大,其中700℃下制得的ZnO粉体粒径最大且纯度高。当ZnO填充量一定时,ZnO粉体粒径越大,越有利于提升ZnO/EP复合材料的导热性能;随ZnO填充量的增加,ZnO/EP复合材料的热导率不断提高,当ZnO体积分数为30.05%时,复合材料热导率达到0.54 W/(m·K),较纯环氧树脂提高了184%,且保持良好的力学性能。The wurtzite ZnO powders were prepared by the sol-gel method,and the influence of calcination temperature on the quality of ZnO powder was investigated.ZnO as-prepared at different calcination temperatures was filled in epoxy resin(EP)to obtain a series of ZnO/EP composites.The structure and morphology of ZnO/EP composites were characterized and analyzed using FTIR and FESEM.The effects of ZnO particle size and content on the thermal conductivity of ZnO/EP composites were studied.The results show that the higher the calcination temperature is,the bigger the particle size of ZnO is.Specifically speaking,ZnO powder prepared at 700℃has the largest particle size and highest purity.Moreover,when the content of ZnO is fixed,ZnO powder with bigger particle size is conducive to improving the thermal conductivity of ZnO/EP composites.With the content of ZnO increasing,the thermal conductivity of ZnO/EP composites continues to increase.When the volume fraction of ZnO is 30.05%,the thermal conductivity of ZnO/EP composites achieves 0.54 W/(m·K),which is 184%higher than that of pure epoxy,and the mechanical property is still maintained at a good level.

关 键 词：ZNO 环氧树脂 复合材料 填料含量 热导率 弯曲强度 

分 类 号：TB34[一般工业技术—材料科学与工程]