The results indicate that in the same reaction conditions the powders prepared by ammoniated silicon sol had smaller pellet diameter and bulk density than the direct sol-gel handling metho...

• 结果表明:采用氨解硅溶胶方法制得的原料粉末比直接溶胶-凝胶方法制得的粉末颗粒直径细小,团聚松散,堆积密度小。在同样合成条件下前者反应获得的碳化硅的转化率高,晶须含量高,质量好。