由本院开设的用二氧化硅碳还原法制取氮化硅粉末的工作已取得了较大进展。二氧化硅碳还原法就是将二氧化硅粉和碳黑的混合料在氮气流中进行氮化的一种方法。此法的优点是原料价格便宜,可获得高纯、超细、高α-β比例的氮化硅粉末,并适于大规模工 Significant progress has been made in the preparation of silicon nitride powder by the carbon dioxide reduction method provided by our hospital. The silica carbon reduction method is a method of nitriding a mixture of silica powder and carbon black in a nitrogen stream. This method has the advantage of cheap raw materials, access to high purity, ultra-fine, high α-β ratio of silicon nitride powder and is suitable for large-scale workers