采用两种无机填料Si3N4和Al（OH）3复合填充环氧树脂制备了环氧模塑料（EMCs），研究了两种填料用量及单独添加和复合添加对环氧模塑料导热性能和阻燃性能的影响。研究结果表明，单独添加Si3N4或A1（OH）3对环氧模塑料导热性能和阻燃性能的影响规律基本一致，即随着填料含量的增加，环氧模塑料的导热性能和阻燃性能均有不同程度的提高；复合添加Si3N4和AI（OH）3对环氧模塑料的导热性能和阻燃性能均起到积极作用，但是随着填料中Si3N4与Al（OH）3体积比的变化，材料导热性能与阻燃性能会产生交叉耦合作用。当填料中Si3N4与Al（OH）3体积比为3：2，总体积分数为60％时，环氧模塑料的导热率可以达到2．15w／（m·K），氧指数为53．5％，垂直燃烧达到UL-94V-0级。
The epoxy molding compounds （EMCs） were prepared by filling high thermal conductive Si3N4 and flame retardant Al（OH）3 into the epoxy. The effects of two fillers on the thermal conductivity and flame retardant of the EMCs were investigated under sole and hybrid fillers filled. The experimental results show that two kinds filler of Si3N4 and Al（OH）3 have similar activity on the flame retardant and thermal conductivity of the EMCs, i.e. with the increasing of filler in the epoxy, the flame retardant and thermal conductivity of the EMCs were improved to a certain extent depend on the type of fillers. Hybrid fillers have a positive effect on the thermal conductivity and flame retardant of EMCs. However, with the volume ratio of Si3 N4 to Al（OH）3 changing, the contribution of fillers to the thermal conductivity and flame retardant of EMC appeare crosscoupling each other. When the volume fraction of the hybrid fillers is 60% and the volume ratio of Si3N4 to Al（OH）3 is 3 ： 2, EMCs with thermal conductivity of 2.15 W/（m K）, LOI of 53.5% and UL- 94 vertical burning test ranking of V- 0 was obtained.
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