摘要
用TG-DTG-DTA(热重-微分热重-差热)联用技术研究了固体配合物[Nd2(Glu)2(H2O)8](ClO4)4.H2O在动态氮气气氛中的热分解过程.采用微分法中的Achar法和积分法中的Coats-Redfern法对热分解第三阶段的数据进行非等温动力学分析处理,推测出热分解机理为二级化学反应,求出了热分解反应的表观活化能和指前因子.用Doyle-Zsako法和Satava-Sestak法对所得结果进行了验证,进一步证明所得动力学参数和机理函数的正确性.4种方法求得的表观活化能和指前因子的平均值分别为198.75kJ/mol和1.69×1017s-1.
The thermal decomposition of complex [Nd2（Glu）2（H2O）8]（ClO4）4·H2O under the flow nitrogen atmosphere was studied by TG-DTG-DTA technique. The non-isothermal kinetic data of the third-stage decomposition process were analyzed by means of Achar method and Coats-Redfern method. The results showed that the most probable kinetic model function was a second order chemical reaction. Moreover, to verify the reliability of the results obtained above, the basic data of the non-isothermal decomposition were analyzed by means of Doyle-Zsako method and Satava-Sestak method. The average values of apparent activation energy （Ea） and preexponential factor （A） obtained by the four methods are 198.75 kJ/mol and 1.69×10^17s^-1.
出处
《武汉大学学报（理学版）》
CAS
CSCD
北大核心
2005年第4期426-430,共5页
Journal of Wuhan University:Natural Science Edition
基金
教育部高校优秀青年教师教学科研奖励计划资助项目(2001)
湖北省教育厅重点资助项目(2001A27006)
关键词
稀土氨基酸配合物
热分解
非等温动力学
热分析
complex of rare earth with amino acid
thermal decomposition
non isothermal kinetics
thermal analysis
