以活性硅微粉、活性碳酸钙和活性氢氧化铝3种无机填料作为环氧树脂灌封胶的导热填料，研究了3种填料的含量对环氧灌封胶粘度、热导率、线性热膨胀系数、阻燃性和拉伸性能的影响。结果表明：无机填料的添加有利于提高环氧树脂灌封胶固化物的热导率，降低体系的线性热膨胀系数；但随着填料添加量的增加，环氧胶的粘度显著增加，对其固化物拉伸性能影响较大，填料添加量应控制在20%～30%为宜；3种无机填料中，氢氧化铝含量对环氧胶阻燃性的影响最明显。
Using active silica powder, active calcium carbonate and active aluminum hydroxide as thermal conductive filler, the effects of filler content on the viscosity, thermal conductivity, coefficient of linear thermal expansion, flame retardancy and tensile property of the epoxy resin pouring sealant were studied. The results show that the addition of inorganic filler is beneficial to increase the thermal conductivity of the cured epoxy resin pouring sealant and decrease the coefficient of linear thermal expansion. With the increase of filler content, the viscosity of the epoxy pouring sealant increases significantly, which have great influence on the tensile property of the cured epoxy pouring sealant, and the filler content should be controlled between 20%~30%. The effect of aluminum hydroxide content on the flame retardancy of the epoxy pouring sealant is the biggest in three kinds of fillers.
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