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本文通过对Ｓｉ－Ｃ－Ｎ－Ｏ系统的热力学分析，利用ＳｉＯ＿２和石墨为原料分别在１２００～１３００℃和１２５０～１４００℃流动Ｎ＿２气氛中制备了α－Ｓｉ＿３Ｎ＿４晶须和β－Ｓｉ＿３Ｎ＿４晶须。并对Ｓｉ＿３Ｎ＿４晶须的合成反应机理进行了讨论。
In this paper, α-Si 3 N 4 whiskers and β-Si 3 N 4 whiskers were prepared by thermodynamic analysis of Si-C-N-O system using SiO 2 and graphite as raw materials in flowing N 2 atmosphere at 1200 ~ 1300 ℃ and 1250 ~ 1400 ℃, respectively. The synthesis reaction mechanism of Si_3N_4 whiskers was also discussed.