【摘要】：以硅灰為硅源、葡萄糖為碳源制備粉體先驅(qū)體,然后經(jīng)過炭化和煅燒,制備類球形亞微米碳化硅粉體。實(shí)驗(yàn)采用1200、1300、1400、1500℃4種溫度煅燒樣品,并對(duì)產(chǎn)物進(jìn)行物相、粒度、形貌分析。結(jié)果表明:1200℃時(shí),碳熱還原反應(yīng)未發(fā)生,硅灰中無定形的二氧化硅轉(zhuǎn)變?yōu)榻Y(jié)晶形態(tài);剩余三種溫度下得到的產(chǎn)物均是3C型碳化硅,在1400℃下能夠制備出球形度良好的亞微米碳化硅粉體,其平均粒徑約為0.2μm;隨著煅燒溫度的升高,碳化硅的結(jié)晶度增強(qiáng)、粒度變大、球形度變差。
[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，

本文編號(hào)：2215093