【摘要】 研究了碳热还原法合成Ｓｉ＿３Ｎ＿４粉末中原料配比、Ｎ＿２流量、反应压力、反应温度、时间及晶种等因素对氮化的影响，获得了较佳的工艺参数，研制出氦含量大于３７％，平均粒径小于１．５μｍ的α—Ｓｉ＿３Ｎ＿４粉末。更多还原

【Abstract】 The synthesis of Si₃N₄ powder by carbothermal reduction was studied .The effects of ratio of raw materials,N₂ flow,reaction pressure,temperature,time and crystalline seed on nitridation were investigated and thereby,optimization processing conditions were achieved. Thus,a α Si₃N₄ powder with nitrogen content above 37%,andan average partical size smaller than 1.5μm was obtained.更多还原