物理化学学报 >> 1986, Vol. 2 >> Issue (05): 392-399.doi: 10.3866/PKU.WHXB19860502

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α-三氢化铝的热分解动力学

叶素; 周德珍; 冉全印   

  1. 黎明化工研究院
  • 收稿日期:1985-06-28 修回日期:1985-11-02 发布日期:1986-10-15

THE THERMAL DECOMPOSITION KINETICS OF α-ALUMINIUM HYDRIDE

Ye Su; Zhou Dezhen; Ran Quanyin   

  1. Liming Research Institute of Chemical Industry
  • Received:1985-06-28 Revised:1985-11-02 Published:1986-10-15

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摘要： 用差热分析(DTA)研究了a-三氢化铝在氦气流下的热分解动力学。建立了A-E方程中动力学参数与DTA曲线的特征温度之间的关系式, 用序贯法对竞争模型进行最佳判别和参数估算, 确定a-三氢化铝的热分解曲线可用方程[-In(1-x)]~(1/4)=r_0e~(-E/RT_t)来描述, 表观活化能E为121.4±6.3 kJmoL~(-1), 指前因子r_0为8.1×10~(11±1)(sec-1), 模型计算结果与实验结果吻合较好。

Abstract: The thermal decomposition kinetics of α-AIH_3 in helium flow was investigated by differential thermal analysis(DTA).
The thermal decomposition curve for of α-AIH_3 is an endothermal process, it yields sigmoidal fraction of decomposition(x)vs.time, the main part of which can be expressed by Avrami-Erofeev (A-E) equation[-In (1-x)]1/n=r_0e~(R/RT). The correlation formula between DTA curve and kinetic parameters in A-E equation was derived under conditions of linear temperature increase.
As sample quantfties a...