Surface Modification of SiC Powder with Silane Coupling Agent

The surface characteristics of SiC powder were modified by a KH-550 silane coupling agent.The process parameters of the modification were optimized,and the effect of surface modification on the dispersion stability of SiC slurry was analyzed.The results show that the SiC powder modified by silane coupling agent can not change the original phase structure of SiC micro-powders but reduce the aggregation of SiC particles in the powders.Compared to the original SiC powder,the surface characteristics of the modi-fied SiC powder change significantly.Zeta potential of SiC increases,and the dispersion stability of SiC slurry is improved.