Process for preparing silicon nitride powder
    1.
    发明授权
    Process for preparing silicon nitride powder 失效
    制备氮化硅粉末的方法

    公开(公告)号:US4514370A

    公开(公告)日:1985-04-30

    申请号:US618524

    申请日:1984-06-08

    IPC分类号: C01B21/068

    摘要: Disclosed is a process for preparing silicon nitride powder, which comprises baking a powdery mixture comprising (i) 1 part by weight of silica powder, or a silica-containing substance in terms of silica, (ii) 0.4 to 4 parts by weight of carbon powder, or a substance generating carbon by baking, in terms of carbon and (iii) 0.005 to 1 part by weight of silicon nitride powder synthesized by a silica reduction method, at a temperature of from 1350.degree. to 1550.degree. C. in a non-oxidative atmosphere containing nitrogen.

    摘要翻译: 公开了一种制备氮化硅粉末的方法,其包括将包含(i)1重量份二氧化硅粉末或含二氧化硅的二氧化硅物质的粉末混合物烘烤,(ii)0.4至4重量份的碳 粉末或通过焙烧产生碳的物质,以碳和(iii)0.005〜1重量份的通过二氧化硅还原法合成的氮化硅粉末,在1350〜1550℃的温度下, 含氮的氧化气氛。