微_纳米氧化铝_环氧树脂复合材料热导率和击穿强度的研究_王旗.pdf
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绝缘材料 2013 ,46(2) 王 旗等:微/纳米氧化铝/环氧树脂复合材料热导率和击穿强度的研究 49
微/纳米氧化铝/环氧树脂复合材料热导率和
击穿强度的研究
王 旗,李 喆,尹 毅,吴建东
(上海交通大学 电子信息与电气工程学院,上海 200240 )
摘要:为研究微、纳米氧化铝无机颗粒对环氧树脂导热性能和电性能的影响,制备出了不同含量微/纳米氧化
铝/环氧树脂复合材料。结果表明:纳米氧化铝提高了环氧树脂的击穿强度,而微米氧化铝则降低了击穿强
度。环氧树脂的热导率随着氧化铝含量的增加而增大,纳米氧化铝因氧化铝颗粒与环氧树脂之间的高热阻
而对环氧树脂热导率影响相对较小。
关键词:纳米氧化铝;微米氧化铝;击穿强度;环氧树脂;热导率
中图分类号:TM215 ;TQ323.5 文献标志码:A 文章编号:1009-9239(2013 )02-0049-04
Thermal Conductivity and Breakdown Strength Study
of Micro/Nano-Alumina/Epoxy Resin Composite
Wang Qi, Li Zhe, Yin Yi, Wu Jiandong
(School of Electric Information and Electrical Engineering,
Shanghai Jiaotong University, Shanghai 200240, China)
Abstract: To study the effects of micro-alumina and nano-alumina inorganic particles on the thermal con-
ductivity and electrical properties of epoxy resin, micro-alumina and nano-alumina/epoxy resin composites
with various micro-size and nano-size alumina contents were prepared. The results show that the nano-alu-
mina enhances the breakdown strength of the epoxy resin while micro-alumina reduces it. The thermal
conductivity of the epoxy resin increases with the increase of the alumina contents. Because of the high
thermal resistance between nano-alumina and epoxy resin, the effects of the nano-alumina on the thermal
conductivity of the epoxy resin are comparatively smaller.
Key words: nano-alumina; micro-alumina; breakdown strength; epoxy resin; thermal conductivity
0 引 言 电力电子器件工作时间较长,绝缘基板上会产
随着电力工业的发展,对材料的低成本、介电 生很高的温度。如果散热不及
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