耐火级氮化硅粉末的球磨特性

Study on Ball-milling of Refractory Silicon Nitride Powder

研究了耐火级氮化硅粉末的球磨性能，起始耐火级氨化硅粉末中含有大量的柱状β－Si_3N_4颗粒，其球磨性能差于常用的α－Si_3N_4。粉料，球磨相同时间仍残留有大量不利于烧结的柱状颗粒，但是通过延长球磨时间可以得到由球状颗粒组成的粉料，而延长球磨时间对起始粉料中的氧含量和杂质含量影响较小。

Ball -milling of refractory silicon nitride powder was studied in this. Refractory siliconnitride powder contains a large amount of rod -like grains, which low ball milling properties, be-cause some residual rod - like grains was found after the same ball milling time as α - Si3N4 pow-der. Equiaxed powder was obtained by increasing the ball milling time, which has little influence onthe oxygen and impurity content.