关键词: 碳化硅;聚碳硅烷;孔径分布

Abstract: Silicon carbide ( SiC ) powder and a certain amount of polycarbosilane , distilled water , polyacrylamide ,polypropylene acid were mixed together and milled to prepare the SiC aqueous slurry , while the dynamic potential and viscosity were simultaneously measured after obtaining the as -prepared sample .Then , the slurry was uniformly coated on a SiC support and synthesized under 1100℃in vacuum condition to obtain the SiC ceramic membrane .The pore size distribution ,water flux as well as morphology of the obtained SiC ceramic membrane were carefully tested .The experimental results indicate that the Zeta potential can maximum reach to -40 mV, the apparent viscosity minimum reach to 20 mPa· s, the pore size of the as-prepared ceramic membrane concentrate in the 1μm and the water flux capacity reach to 40 m3/(m2· h) when the pH value of the coating slurry was fixed at 11.

Key words: SiC;polycarbosilane;pore size distribution