纳米银颗粒包覆氧化铝的制备及其硅胶复合材料热导率

摘要

用化学方法在微米级球形氧化铝上包覆纳米银颗粒,包覆层可在空气中稳定存在.银包覆层明显提高了氧化铝/硅胶复合材料的热导率.复合材料断面形貌图显示纳米银包覆层改善了氧化铝与硅胶之间的界面结合,并且银颗粒起到桥梁作用连接起相邻的氧化铝.%Nano-silver coated Al2O3 particles were prepared by chemical method, and the silver nanoparticles kept stable in air. This coating layer enhanced the thermal conductivity of Al2O3/silicone rubber (SR) composites. The microscopic topography of the composites showed that the coating layer improved the interface bonding between Al2O3 and silicone rubber, and the silver particles bridged the adjacent Al2O3 particles.