DENG Lirong^1a，WANG Xiaogang^1a,2,3，HUA Xiaohu^1a，LU Shuhe^1a,3，WANG Jiabo^1b，WANG Hangbo²

(1 a.College of Materials Science and Engineering; 1 b.Center of Engineering Training，Xi’an University of Science and Technology,Xi’an 710054, China; 2.Xi’an Boer New Material Co., Ltd., Xi’an 710089, China;3.Xianyang New Energy Materials Industry Research Institute Co., Ltd., Xianyang, 712000, China)

Abstract: In order to obtain batch preparation technology, high purity β-SiC nano-powder were prepared by mechanical crushing method.The particle size distribution, sphericity, microstructure and dispersion stability of β-SiC nano-powders with different particle sizes were investigated by experiments.The results show that mechanical crushing method is suitable for preparing β-SiC nanoproducts which particle sizeis less than 200 nm and the minimum particle size of product can reach 30 nm.The longer the grinding time, the finer the particle size of product is.The narrower the particle size distribution, the better the sphericity of the product is.The diffraction peak intensity of β-SiC decreases with the decreasing of particle size, the peak shape becomes wider and the lattice structure changes from single crystal to polycrystal.Amorphous silica oxide layer with a thickness of about 5 nm is induced on the outer layer of particles.β-SiC slurry doesnot have isoelectric point at pH value from 2 to 11 and has good dispersion stability under neutral and alkaline conditions.

Keywords: mechanical crushing; β-SiC nano-powders; powder characterization

(1.西安科技大学 a.材料科学与工程学院；b.工程训练中心，陕西 西安 710054；

2.西安博尔新材料有限责任公司，陕西 西安 710089；3.咸阳新能源材料产业研究院有限责任公司，陕西 咸阳 712000)

中图分类号： TB321                            文献标志码：A

文章编号：1008-5548(2022)01-0062-06

DOI:10.13732/j.issn.1008-5548.2022.01.007

收稿日期： 2021-05-07，修回日期：2021-10-12，在线出版时间：2021-12-01。

基金项目：国家自然科学基金项目，编号：51602254。

第一作者简介：邓丽荣(1984—)，女，博士研究生，研究方向为碳化硅粉体制备与应用。E-mail：denglirong@xust.edu.cn。

通信作者简介：王晓刚(1959—)，男，二级教授，博士，博士生导师，研究方向为硅镁碳材料制备与应用。E-mail：1469111843@qq.com。