摘要：用一种新的方法———双重加热法制备了直径在 5 0～ 6 0nm范围内的SiC超细粉 ,用化学分析方法、X射线衍射、透射电子显微镜等手段对SiC超细粉进行了表征。研究结果表明 ,用双重加热法制备SiC超细粉的最佳温度为135 0℃ ,恒温时间为 6 0min ,SiC超细粉的产率可达 98% (质量分数 )左右

关键词：碳化硅；超细粉；制备

Abstract：The SiC ultrafine powders,which diameter is in the range of 50～60nm,were prepared by a new method named double heating method.SiO 2 nanometer powder and carbon nanometer powder were used as starting materials.The character of the SiC ultrafine powders was determined by the chemical analysis methold,XRD and TEM.The experimental results show that the best temperature for preparing SiC ultrafine powders is 1350℃,and the time is 60min,the yield ratio of the SiC ultrafine powders is about 98%. The double heating method is a new method for prepared SiC ultrafine powders with a large amount and a low costing.

Keywords：SiC;ultrafine powder;preparation