Novel heat-conductive composite silicone rubber
Novel heat-conductive composite silicone rubber
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DOI：
10.1002/app.25479
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发表时间：
2007-05-15
影响因子：
3
通讯作者：
Zhao, Hongzhen
中科院分区：
文献类型：
--
作者：
Zhou, Wenying;Qi, Shuhua;Zhao, Hongzhen
以乙烯基封端的聚甲基硅氧烷为基胶，以导热但电绝缘的杂化Al 2 O3粉体为填料，制备了具有良好导热性和电绝缘性的硅橡胶。研究了Al 2 O3用量对硅橡胶的导热系数、热膨胀系数（CTE）、热稳定性和力学性能的影响，发现随着Al 2 O3用量的增加，硅橡胶的导热系数和热稳定性增加，但CTE降低。与单一粒径的Al 2 O3填充硅橡胶相比，混杂Al 2 O3填充硅橡胶具有更高的热导率。以电工玻璃布为增强体，研制出导热系数为0.92W/mK、电绝缘性能良好、力学性能优良的新型导热硅橡胶复合材料。(c)2007 Wiley Periodicals，Inc.
The silicone rubber with good thermal conductivity and electrical insulation was obtained by taking vinyl endblocked polymethylsiloxane as basic gum and thermally conductive, but electrically insulating hybrid Al2O3 powder as fillers. The effects of the amount of Al2O3 on the thermal conductivity, coefficient of thermal expansion (CTE), heat stability, and mechanical properties of the silicone rubber were investigated, and it was found that the thermal conductivity and heat stability increased, but the CTE decreased with increasing Al2O3 fillers content. The silicone rubber filled with hybrid Al2O3 fillers exhibited higher thermal conductivity compared with that filled with single particle size. Furthermore, a new type of thermally conductive silicone rubber composites, possessing thermal conductivity of 0.92 W/mK, good electrical insulation, and mechanical properties, was developed using electrical glass cloth as reinforcement. (c) 2007 Wiley Periodicals, Inc.