摘要：以蔗糖脂肪酸酯(SE)为分散剂制备得到稳定性好、分散性高的SiC水基浆料,研究SiC浆料pH值、分散剂含量、浆料固相体积分数等因素对SiC浆料分散性的影响,并对SE的作用机理进行分析。结果表明:使用SE作为分散剂，能够均匀有效地分散SiC浆料，且能制备得到分散性优异的高质量浓度SiC浆料；当浆料pH值为10、分散剂质量分数为25%、SiC体积分数为20%～30%时，SiC粉末颗粒能够均匀地分散在水基体系中，此时SiC浆料的流动性和分散性最好，并最终制备SiC浆料的固相体积分数高达65%。

关键词：蔗糖脂肪酸酯；碳化硅浆料；黏度；分散性

Abstract: Silicon carbide water-based slurry with good stability and high dispersibility were prepared using sucrose fatty acid ester as dispersant．The effects of pH value，dispersant content，and solid phase volume fraction of SiC slurry on the dispersibility of SiC slurry were studied，and the mechanism of sucrose fatty acid ester was analyzed．The results show that the SiC slurry can be dispersed uniformly and effectively using sucrose fatty acid ester as dispersant，and the SiC slurry with high concentration with excellent dispersibility can be prepared．When the pH value of the slurry is 10，the dispersant content is 25% ，and the volume fraction of SiC is 20%～ 30% ，the SiC powder particles can be uniformly dispersed in the water matrix system．Under the condition，the fluidity and dispersion of SiC slurry are the best，and the final preparation of SiC slurry solid volume content is as high as 65% ．

Keywords: sucrose fatty acid ester; SiC slurry; viscosity; dispersibility