以碳粉、硅粉为原料,以聚四氟乙烯为添加剂,在氮气气氛下采用燃烧合成工艺制备出了高纯β相碳化硅微粉.扫描电镜观察粉体颗粒平均粒径约为 249nm,呈等轴球形.添加剂含量在 5% 以上时,均可以得到单相β-SiC;随着添加剂含量提高,产物中剩余碳增多,粉体颗粒有长大趋势;改变氮气压力对产物结构没有显著影响,但可以提高燃烧速率.
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