刚玉型Al_(2)O_(3)与片状BN复合填充聚苯硫醚制备高导热复合材料

Preparation of high thermal conductivity composites by composite filling PPS with corundum alumina and flake BN

以聚苯硫醚(PPS)为基体,刚玉型Al_(2)O_(3)与少量片状BN为复合导热填料,采用低温高压的模压工艺制备了Al_(2)O_(3)/PPS/BN高导热复合材料。研究了填料粒径及含量、PPS含量对复合材料导热性能和力学性能的影响,并确定了一种高导热Al_(2)O_(3)复合材料的制备工艺。采用扫描电子显微镜、导热测量仪、万能试验机等研究了试样的形貌、导热率及力学性能。结果表明:w(Al_(2)O_(3))为89%,w(BN)为3%,w(PPS)为8%时,复合材料的导热率达5.44 W/(m·K),最高导热率是环氧树脂的21.76倍,且具有优异的力学性能。

Polyphenylene sulfide(PPS)was used as polymer matrix,corundum alumina and a small amount of flake boron nitride(BN)as composite thermal conductive filler to prepare Al_(2)O_(3)/PPS/BN high thermal conductivity composites via low temperature and high pressure molding process.The effects of PPS content,particle size and content of filler on thermal conductivity and mechanical properties of the composites were studied.A preparation process of high thermal conductivity Al_(2)O_(3)composite material was determined.The morphology,thermal conductivity and mechanical properties of the samples were systematically studied by scanning electron microscope,thermal conductivity measuring instrument and universal testing machine.The results show that the thermal conductivity of the composites is 5.44 W/(m·K),21.76 times than that of epoxy resin when the mass fraction of Al_(2)O_(3),BN and PPS are 89%,3%,8%respectively.The mechanical properties of the composites are excellent.