摘要：选取不同种类的硅烷偶联剂,采用球磨工艺,在乙醇介质中对SiC粉体表面进行包覆改性。结果表明:硅烷偶联剂的种类和化学结构对改性后SiC浆料的性能影响较大,添加质量分数为0.10%的硅烷偶联剂KH-560改性后SiC浆料的固含量增大,流变性显著提高;总有机碳分析仪测定水洗浆料上层液体中有机残留物结果显示,硅烷偶联剂在粉体表面形成了较好的包覆层,浆料稳定性得到提高。

关键词：SiC粉体；硅烷偶联剂；表面改性；流变性

Abstract： SiC powders were modified by surface coating with different kinds of silane coupling agents in ethanolic suspensions by ball milling. The results show that the composition and structure of silane coupling agents can markedly affect the property of modified SiC slurry. Solid content and rheological property of the slurry obviously increase when the silane coupling agent KH-560 with mass fraction of 0.10% is added. The organic residues in the upper liquid of washing slurry detected by total organic carbon （TOC） indicate that SiC slurry exhibits better cladding layer and the stability of SiC slurry improves greatly. 

Keywords: SiC powder； silane coupling agent； surface modification； rheological property