硅灰为原料制备类球形亚微米碳化硅粉体

发布时间：2018-08-31 13:14

【摘要】：以硅灰为硅源、葡萄糖为碳源制备粉体先驱体,然后经过炭化和煅烧,制备类球形亚微米碳化硅粉体。实验采用1200、1300、1400、1500℃4种温度煅烧样品,并对产物进行物相、粒度、形貌分析。结果表明:1200℃时,碳热还原反应未发生,硅灰中无定形的二氧化硅转变为结晶形态;剩余三种温度下得到的产物均是3C型碳化硅,在1400℃下能够制备出球形度良好的亚微米碳化硅粉体,其平均粒径约为0.2μm;随着煅烧温度的升高,碳化硅的结晶度增强、粒度变大、球形度变差。
[Abstract]:Silica fume was used as silicon source and glucose as carbon source to prepare precursor powder. After carbonization and calcination, spherical submicron silicon carbide powder was prepared. The samples were calcined at 1 200 鈩，

本文编号：2215093