硅烷偶联剂对碳化硅粉体表面改性.pdf

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硅烷偶联剂对碳化硅粉体表面改性.pdf

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· 409 · 2011 39 3 Vol. 39 No. 3 2 0 1 1 3 JOURNAL OF THE CHINESE CERAMIC SOCIETY March 2011 ( 810016) KH-550 SiC SiC SiC SiC SiC SiC Zeta TQ174 A 0454–5648(2011)03–0409–05 Surface Modification of SiC Powder with Silane Coupling Agent TIE ShengnianLI Xing (Non-Metallic Materials Institute of Qinghai University, Xining 810016, China) Abstract: 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. Key words: silicon carbide; surface modification; silane coupling agent; dispersibility SiC [1–2] SiC KH-550 [3] SiC SiC SiC SiC SiC 1 SiC [4–6]SiC 1.1 [7