不同形貌的银对导电胶性能的影响

银的形貌、银表面的润滑剂、树脂基体的成分、固化过程等都会影响导电胶的性能。其中,银的形貌是一个关键的因素。论文研究了在相同条件不同形貌的银对导电胶性能的影响。将银片、银球和银线用戊二酸处理以消除其他因素的影响,然后这些银粒子被用作导电填料与环氧树脂混合制备导电胶。研究了不同形貌银粉制备的导电胶热降解性能、导电性能、机械性能及贮存稳定性。结果表明在相同条件下银线制备的导电胶具有最低电阻率和渗流阈值、最好的机械性能、以及较好的贮存稳定性,银片制备的导电胶导电性能和贮存稳定性比用银球制备的导电胶好,但机械性能比用银球制备的导电胶差。

Effect of the silver with different morphologies on the performance of electrical conductive adhesives

The morphology of silver fillers, surface lubricants of silver fillers, the composition of matrix, curing procedures and so on will affect the performance of ECAs. The morphology of silver fillers is a crucial factor. Effect of the silver with different morphologies on properties of ECAs under the same condition was studied. silver flakes, silver spheres and silver wires were prepared and treated by glutaric acid to eliminate the effect of other factors. Then these silver particles were used as conductive fillers compositing with epoxy resin to prepare ECAs. The thermal degradation, electrical conductive properties, mechanical property and storage stability of ECAs were investigated. The results show ECAs filled with silver wires exhibit lowest electrical resistivity and percolation threshold, best mechanical property and good storage stability under the same condition. ECAs filled with silver flakes show better electrical conductive property and storage stability but poorer mechanical property than ECAs filled with silver spheres.