Preparation and Thermal Conductivity of ZnO/EP Composites

Abstract

Abstract: 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.

Key words: ZnO, epoxy resin, composite, filler volume fraction, thermal conductivity, flexural strength

CLC Number:

TB34

LIU Rong, CHEN Guo, LI Liangfeng, GAO Pengfei, WANG Yuping. Preparation and Thermal Conductivity of ZnO/EP Composites[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(4): 1370-1377.

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