WEN Zhangping^1,2，ZHANG Cheng¹，ZHANG Yonggang^2,3，WANG Xuefei²，QIAN Xin²

(1.School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China;2.National Engineering Laboratory of Carbon Fiber Preparation Technology, Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences, Ningbo 315201, China; 3.Key Laboratory of Optical System Advanced Manufacturing Technology,Chinese Academy of Sciences, Changchun 130012,China )

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

中图分类号：TQ174

文献标志码：A

收稿日期：2018-08-15，修回日期：2018-11-19，在线出版时间：2019-01-09 07:00。

基金项目：宁波市重大科技专项，编号 ：2015B11042；上海市科委资助项目，编号：17DZ2201700。

第一作者简介：文章苹(1993—)，女，硕士研究生，研究方向为碳纤维碳化硅陶瓷基复合材料。E-mail：wenzhangping@nimte.ac.cn。

通信作者简介：张永刚(1975—)，男，硕士，高级工程师，硕士生导师，研究方向为碳纤维复合材料。E-mail：zhangyonggang@nimte.ac.cn。

文章编号：1008-5548(2019)02-0054-07