摘要：氧化铝性能不仅影响环氧树脂酸酐体系的粘度、填料添加量,而且杂质还影响浇注件的表观及电气绝缘性能,以及对氧化铝环氧树脂中的分散性也有很大的影响。为了改善氧化铝的物化性能以对改善环氧浇注工艺和提高浇注制件质量,本文中从粒度及粒度分布、晶体结构、微观形貌、杂质含量等方面,对比分析了电工用氧化铝填料的各项物化指标对环氧树脂浇注性能及浇注件机电性能的影响,得出合适的粒度和粒度分布、提高α相转化率、改善微观形貌、提高纯度等是提高环氧浇注用填料氧化铝性能的途径。

关键词：填料氧化铝；环氧浇注；性能

Abstract：Properties of alumina filler can have a dominating effect on epoxy resin cast system, not only on viscosity of epoxy resin cast system, quantity, but on appearance, insulated property of product, dispersing of alumina in resin as well. In order to improve the technical parameter and product quality, the effect of alumina with different chemical and physical properties on epoxy resins cast process and mechanical and electrical character of the resins products was studied, especially analyzed the different results due to different particle size and it's distribution , crystal structure , micro-structure, chemical composite of alumina which was used for filler of epoxy resin. Finally suitable particle size and it's distribution, improve of α- ratio, micro-structure, and purity is the way to improve properties of alumina filler.

Keywords：alumina filler;epoxy cast;character