物理化学学报 >> 2007, Vol. 23 >> Issue (07): 1095-1098.doi: 10.3866/PKU.WHXB20070725

研究简报 上一篇    下一篇

ZnSn(OH)6的热分解动力学

张予东; 李宾杰; 徐翔民; 李德亮   

  1. 河南大学化学化工学院, 河南 开封 475001; 河南大学特种功能材料重点实验室, 河南 开封 475001
  • 收稿日期:2006-12-27 修回日期:2007-03-20 发布日期:2007-07-03
  • 通讯作者: 张予东 E-mail:zyd71@henu.edu.cn

Thermal Decomposition Kinetics of ZnSn(OH)6

ZHANG Yu-Dong; LI Bin-Jie; XU Xiang-Min; LI De-Liang   

  1. College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475001, Henan Province, P. R. China; Laboratory for Special Functional Materials, Henan University, Kaifeng 475001, Henan Province, P. R. China
  • Received:2006-12-27 Revised:2007-03-20 Published:2007-07-03
  • Contact: ZHANG Yu-Dong E-mail:zyd71@henu.edu.cn

摘要: 用TG/DTG联用技术, 在2.5、5.0、10.0、15.0、20.0 K·min-1不同线性升温条件下, 研究了ZnSn(OH)6的热分解过程. 结果表明, 在氮气气氛下, ZnSn(OH)6在298-873 K范围内发生了一步分解. 其失重率与理论计算值相符. 应用非等温多重扫描速率法对热分解过程进行了动力学分析, ZnSn(OH)6在氮气中分解的活化能E=128.77 kJ·mol-1, 指前因子lg(A/s-1)=10.61, 机理函数为Mample单行法则.

关键词: TG/DTG, 热分解, 机理, 动力学

Abstract: The thermal decomposition processes of ZnSn(OH)6 were studied using TG/DTG at various heating rates of 2.5, 5.0, 10.0, 15.0, 20.0 K·min -1. The results showed that the decomposition proceeded through one step in nitrogen atmosphere at the temperature range from 298 to 873 K. A good agreement was found between the mass loss of the thermal decomposition of ZnSn(OH)6 and the theoretical mass loss. The thermal decomposition kinetics was investigated employing non-isothermal multiple scanning method. The activation energy for the decomposition reaction of ZnSn(OH)6 was determined to be E=128.77 kJ·mol-1 in nitrogen atmosphere and the pre-exponential factor of its kinetics equations was calculated to be lg(A/s-1)=10.61. The mechanism function was obtained to be Mample Power theorem.

Key words: TG/DTG, Thermal decomposition, Mechanism, Kinetics

MSC2000: 

  • O642