环氧树脂(EP)中加入氮化铝(AlN)制备出导热复合材料,研究了AlN含量对复合材料导热系数、工频击穿场强、相对介电常数、介质损耗角正切值和体积电阻率的影响。结果表明:随AlN含量的增加,复合材料的导热系数增加,复合材料的工频击穿场强和体积电阻率随AlN含量的增加而减小,在10~(-2)~10~7 Hz范围内介电常数和介质损耗角正切值都随AlN含量的增加而变大。 In the epoxy resin (EP), aluminum nitride (AlN) was added to prepare the thermal conductive composite. The effect of AlN content on the thermal conductivity, breakdown frequency, dielectric constant, dielectric loss tangent and volume resistivity Rate of impact. The results show that with the increase of AlN content, the thermal conductivity of the composites increases. The breakdown frequency and volume resistivity of the composites decrease with the increase of AlN content. At 10 -2 to 10 7 Hz The range of dielectric constant and dielectric loss tangent values ​​both increase with increasing AlN content.