摘要
分别选用纳米和超细A l2O3填料,采用直接分散法制备A l2O3/环氧树脂复合材料,研究了不同填料含量的复合材料的导热性能,并结合理论模型探讨粉体粒径对导热性能的影响。结果表明:随着A l2O3含量的增加,复合材料的导热系数增大。当加入40%的超细A l2O3填料时,复合材料的导热系数达到0.535 W/(m.K),是纯环氧树脂的3倍。实验测量值与Y.Agari模型参数均表明:超细A l2O3的体系中粒子更容易形成导热链,可以更有效地提高环氧树脂体系的导热性能。
Alumina/epoxy resin composites were prepared via dispersing directly, using nano-alumina and micro-alumina particles respectly. Thermal conductivity of the composites with different filler content was studied,and effect of particle size on thermal conductivity was investigated combined with theoretical models. The results showed that thermal conductivity of composites increasesed with increasing alumina content. When the mass fraction of micro-alumina was 40 % , thermal conductivity of the composites was 0. 535 W/（ m · K） , trebling of that of pure epoxy resins. It was proved by experimental values and coefficient of Y. Agari model that micro-alumina filler was easier to form conductive filler chains and could improve thermal conductive properties effectively.
出处
《塑料》
CAS
CSCD
北大核心
2009年第1期62-64,共3页
Plastics
基金
新材料及其制备技术广西壮族自治区重点实验室开放基金项目(桂科能063006-5C)
