| ZnSn(OH)6的热分解动力学 |
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| 引用本文： | 张予东,李宾杰,徐翔民,李德亮. ZnSn(OH)6的热分解动力学[J]. 物理化学学报, 2007, 23(7): 1095-1098. DOI: 10.3866/PKU.WHXB20070725 |
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| 作者姓名： | 张予东 李宾杰 徐翔民 李德亮 |
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| 作者单位： | 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 |
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| 基金项目： | 河南大学校科研和教改项目 |
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| 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.
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| 关 键 词： | TG/DTG 热分解 机理 动力学 |
| 收稿时间： | 2006-12-27 |
| 修稿时间： | 2006-12-272007-03-20 |
Thermal Decomposition Kinetics of ZnSn(OH)6 |
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| ZHANG Yu-Dong,LI Bin-Jie,XU Xiang-Min,LI De-Liang. Thermal Decomposition Kinetics of ZnSn(OH)6[J]. Acta Physico-Chimica Sinica, 2007, 23(7): 1095-1098. DOI: 10.3866/PKU.WHXB20070725 |
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| Authors: | ZHANG Yu-Dong LI Bin-Jie XU Xiang-Min LI De-Liang |
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| Affiliation: | 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 |
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| 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. |
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| Keywords: | TG/DTG |
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