摘要
本文针对填料氧化铝的表面处理进行了研究,试验选取不同的偶联剂对填料氧化铝进行表面处理,通过吸油值、粘度及扫描电镜对表面处理后的填料氧化铝进行表征,并对偶联剂的表面处理作用及机理进行了初步的探讨。结果表明,偶联剂可以明显的降低填料氧化铝的吸油值,相对于未表面处理的填料氧化铝,经偶联剂A、B、C表面处理后填料氧化铝的吸油值分别下降了7.5%、20%、30%。随着偶联剂C添加量的增加,填料氧化铝的粘度逐渐降低,当偶联剂C的添加量超过0.3%时,其粘度下降趋缓,基本达到平衡。偶联剂C的最佳添加量为0.3%,此时体系粘度为5850MPa·s,相对于未表面处理的填料氧化铝的粘度下降了44%,并且表面处理后的填料氧化铝粉体分散性较好,颗粒无明显团聚现象存在,粉体棱角减少。
In this paper, the surface treatment of thermal conductive filler alumina was studied, different kinds of coupling agent for surface treatment of thermal conductive filler alumina was selected for the experiment. After the surface treatment the thermal conductive filler alumina was characterized by the oil absorption value, viscosity and scanning electron microscope （SEM）. Preliminary discussion on the surface treatment effect and mechanism of the cou- pling agent were carried out. The results showed that the coupling agent could significantly reduce the oil absorption value of thermal conductive filler alu- mina, comparing with untreated filler alumina, the oil absorption value of thermal conductive filler alumina were decreased by 7.5%, 20%, 30% respectively after surface treatment by coupling agent A, B and C. With the increasing of the addition amount of coupling agent C, the viscosity of thermal con- ductive filler alumina decreased gradually, when the amount of coupling agent C was added more than 0.3%, the viscosity decreased slowly, and the bas- ic equilibrium was reached. The optimum adding amount of coupling agent C was 0.3%, the viscosity of the system was 5850MPa· s. Compared with untreated filler alumina, the viscosity of alumina decreased by 44%, and the surface treated thermal conductive filler alumina powder had better dispersion, there was no obvious agglomeration phenomenon, and the edges and comers of the powder reduced.
出处
《轻金属》
CSCD
北大核心
2017年第6期9-12,21,共5页
Light Metals
关键词
填料氧化铝
表面处理
偶联剂
吸油值
粘度
thermal conductive filler alumina
surface treatment
coupling agent
oil absorption value
viscosity
