DENG Lirong1, 2, WANG Xiaogang1, 2, LU Shuhe1, 2, FAN Zimin1, 2,WANG Jiabo2, WANG Hangbo2, PEI Zhihui2
(1. School of Material Science and Engineering， Xi’an University of Science and Technology, Xi’an 710054, China；2.Xi’an Bore New Material Co., Ltd.，Xi’an 710089, China)
Abstract: 3C-SiC micropowder of high purity, high density and large particle size which used the micron grade silicon and carbon materials with mass fraction of 99% and 90.87% respectively as raw materials were prepared by vacuum synthesis with multiple heat sources .The effects of of the ratio of carbon and silicon, raw material size and reaction temperature were studied .The results show that the ratio of carbon and silica has an effect on the reaction speed and the product purity, the 3C-SiC micropowder synthesized can reach 99.99% when the ratio of carbon and silicon is 1.05 ∶1. Compared with the silica materials, the particle size of carbon material has a more significant effect on the product granularity, the larger and higher purity 3C-SiC micropowder can be prepared when the carbon material is bigger in a certain extent. The average particle size D50 of micropowder can reach 21.7 μm. In 1 300～1 800 ℃, the higher of the temperature is, the more completeness, bigger and compacter of the products are, and the density can be 3.212 g/cm3.
Keywords: vacuum synthesis with multiple heat sources； high purity； high density； large particle size； 3C-SiC micropowder
文章编号：1008-5548(2020)02-0029-06
DOI:10.13732/j.issn.1008-5548.2020.02.005
收稿日期： 2019-09-02，修回日期：2019-10-27，在线出版时间：2019-12-31 08:54。
基金项目：国家自然科学基金项目，编号：51074123；陕西省科技统筹计划项目，编号：2016KTCQ01-97。
第一作者简介：邓丽荣(1984—)，女，博士研究生，工程师，研究方向为粉体材料制备与表征。E-mail：37783782@qq.com。
中图分类号：TQ174 文献标志码：A
