以Al2O3为导热填料制备了填充型环氧基复合材料,研究了其导热系数与氧化铝粉体的填充量、粒径和形状之间的关系.结果表明:复合材料的导热系数随着氧化铝填充量的增加而增大,当氧化铝填充量较低时,导热系数随填料粒径的增加而增大;当氧化铝填充量较高时,导热系数随填料粒径的增加而减小.通过复配填充的方法最终获得了导热系数大于1.10 W/(m·K)且黏度适宜的环氧基复合材料.
An epoxy resin composite was prepared using Al2O3 as filler, and the effect of content, particle size, and shape of Al2O3 on the thermal conductivity of the composite was studied. The results show that the thermal conductivity of the composite increases with the increase of Al2O3 content. When the Al2O3 content is low, the thermal conductivity increases with the increase of particle size; when the Al2O3 con-tent is high, the thermal conductivity decreases with the increase of particle size. Finnally, an Al2O3-filled epoxy resin composite with thermal conductivity more than 1.10 W/(m·K) and appropriate viscosity is prepared through compound filling.
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