貯熱材料四氯合金屬酸(Ⅱ)二烷基銨固-固相變動力學

武克忠; 李建玲; 王新東; 劉曉地

doi:10.13374/j.issn1001-053x.2007.09.036

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貯熱材料四氯合金屬酸(Ⅱ)二烷基銨固-固相變動力學

doi: 10.13374/j.issn1001-053x.2007.09.036

1. 河北師范大學化學與材料科學學院, 石家莊 050016;
2. 北京科技大學冶金與生態工程學院, 北京 100083

基金項目:

國家自然科學基金資助項目(No.50404013)

河北師范大學博士基金資助項目(No.L2006B16)

詳細信息

作者簡介:
武克忠(1968-),男,副教授,博士

中圖分類號: TB34;O642.4⁺2
計量
- 文章訪問數: 137
- HTML全文瀏覽量: 28
- PDF下載量: 7
- 被引次數: 0
出版歷程
- 收稿日期: 2006-03-05
- 修回日期: 2006-10-15
- 網絡出版日期: 2021-08-16

Nonisothermal kinetics of solid-solid phase transitions in C₁₂Mn,C₁₄Mn and their binary system

1. Department of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050016, China;
2. Metallurgical and Ecological Engineering School, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 熱致相變貯熱材料四鹵合金屬酸(Ⅱ)二烷基銨具有層狀鈣鈦礦結構,通過晶型有序-無序轉變能可逆地固-固相變貯熱.合成了兩種材料四氯合錳酸十二銨n-(C₁₂H₂₅NH₃)₂MnCl₄和四氯合錳酸十四銨n-(C₁₄H₂₉NH₃)₂MnCl₄,并在兩種材料的乙醇溶液中結晶出一系列二元混合體系.對純組分及各個二元體系利用差示掃描量熱(DSC)測定了熱分析曲線,采用Kissinger和Ozawa兩種動力學模型研究了材料的非等溫固-固相變動力學,計算了固-固相變過程的活化能和反應級數.兩種方法的計算結果相一致.隨著C₁₂Mn質量分數的增加,二元體系表觀活化能E_a值呈波動變化.C_nMn及二元體系的反應級數均接近于1.
- 貯熱材料 /
- 四氯合錳酸十二烷基銨 /
- 四氯合錳酸十四烷基銨 /
- DSC /
- 固固相變 /
- 激活能
Abstract: Thermotropic phase transitions in the perovskite-type layer compounds n-(C₁₂H₂₅NH₃)₂MnCl₄ and n-(C₁₄H₂₉NH₃)₂MnCl₄ were synthesized and a series of their mixtures were prepared from ethanol solution. The nonisothermal kinetics of solid-solid phase transitions in C₁₂Mn, C₁₄Mn and their binary system was investigated by DSC. Kissinger and Ozawa methods were applied to determine the activation energy and reaction order of the solid-solid transitions, and the results of two methods are coincident. The value of activation energy Ea showed fluctuant with increasing X_C₁₂Mn. The reaction order of C_nZn and their binary system is about 1.
- storage heat Materials /
- dodecylammonium tetrachloromanganate /
- tetradecylammonium tetrachloromanganate /
- solid-solid phase transition /
- activation energy /