【摘要】 以纳米SiO₂作为增强材料,制备了纳米SiO₂/环氧树脂灌封材料,并研究了不同的纳米含量对灌封材料性能的影响,采用透射电镜（TEM）对纳米SiO₂粒子分散情况进行了分析。结果表明,纳米SiO₂均匀地分散在环氧树脂基体中,有效地改善了环氧树脂的力学性能,并且当纳米SiO₂含量为3％时,纳米SiO₂/环氧树脂灌封材料的力学性能最佳,其冲击强度和弯曲强度比环氧树脂分别提高98％和112％,同时电学性能也有所提高。更多还原

【Abstract】 In order to enhance the mechanical properties of epoxy resin, encapsulating materials are prepared with nano-SiO₂ and epoxy resin. The effects of the content of nano-SiO₂ on the properties of the encapsulating materials are studied. The dispersion of nano-SiO₂ is observed with TEM. The results indicate that nano-SiO₂ is dispersed in epoxy resin matrix homogeneously and the mechanical properties of the epoxy resin are improved efficiently. When the content of nano-SiO₂ is 3%, the mechanical properties of encapsulating materials are the best,impact strength reaches 27. 64kJ/m²,flexural strength reaches 136. 68MPa,98% and 112% higher than that of epoxy resin when SiO₂ is 0%. At the same time,some electric properties of encapsulating materials are improved.更多还原