| Mg（CH3COO）2·4H2O的热分解机理 |
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| 引用本文： | 孙秋香,宋力,袁良杰,张友祥,张克立.Mg（CH3COO）2·4H2O的热分解机理[J].湖北大学学报(自然科学版),2009,31(3):285-289. |
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| 作者姓名： | 孙秋香 宋力 袁良杰 张友祥 张克立 |
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| 作者单位： | 孙秋香(湖北第二师范学院,化学系,湖北,武汉,430205);宋力(信阳师范学院,化学化工学院,河南,信阳,464000);袁良杰,张友祥,张克立(武汉大学,化学与分子科学学院,湖北,武汉,430072) |
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| 基金项目： | 国家自然科学基金，湖北第二师范学院校管重点课题 |
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| 摘 要： | 用热分析（TG／DTG／DTA，DSC）、X射线衍射（XRD）技术研究了固态物质Mg（CH3COO）2·4H2O在氩气中热分解过程。热分析结果表明，Mg（CH3COO）2·4H2O在氩气中分两步分解。其质量变化率与理论计算相吻合。XRD结果表明，Mg（CH3COO）2·4H2O分解最终产物为MgO。用Friedman和FWO法对分解过程的活化能E进行了初步计算，依此为初始值，用多元非线性回归得到了分解步骤可能的机理函数和动力学参数。
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| 关 键 词： | Mg(CH3COO)2·4H2O TG/DTG/DTA DSC XRD 热分解 机理 动力学 |
Kinetics and mechanism of thermal decomposition of Mg(CH3COO)2·4H2O |
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| SUN Qiu-xiang,SONG Li,YUAN Liang-jie,ZHANG You-xiang,ZHANG Ke-li.Kinetics and mechanism of thermal decomposition of Mg(CH3COO)2·4H2O[J].Journal of Hubei University(Natural Science Edition),2009,31(3):285-289. |
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| Authors: | SUN Qiu-xiang SONG Li YUAN Liang-jie ZHANG You-xiang ZHANG Ke-li |
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| Institution: | 1.Department of Chemistry;Hubei University of Education;Wuhan 430205;China;2.Department of Chemistry and Chemical Engineering;Xinyang Normal University;Xinyang 46400;3.College of Chemistry and Molecular Sciences;Wuhan University;Wuhan 430072;China |
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| Abstract: | The thermal decomposition processes taking place in the solid state Mg（CH3COO）2·4H2O
were studied in Ar with TG/DTG/DTA, DSC and XRD techniques. TG-DTG/DTA, DSC curves showed that, the decomposition proceeds through two well-defined steps in Ar. Mass loss of the thermal decomposition of Mg（CH3COO）2·4H2O is in good agreement with the theoretical mass loss. XRD showed that, the product of the thermal decomposition was MgO. The activation energies of Mg（CH3COO）2 thermal decomposition, as a initial value,were calculated through the Friedman and Flyrm-Wall-Ozawa（FWO）methods, and the possible conversion functions were estimated through the multiple-nonlinear regression method. |
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| Keywords: | TG/DTG/DTA DSC XRD |
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