| Keggin结构杂多酸热性质研究 |
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| 引用本文： | 王作屏,牛景扬,许林,彭君,王恩波.Keggin结构杂多酸热性质研究[J].化学学报,1995,53(8):757-764. |
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| 作者姓名： | 王作屏 牛景扬 许林 彭君 王恩波 |
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| 作者单位： | 东北师范大学化学系 长春130024
(王作屏，牛景扬，许林，彭君)，东北师范大学化学系 长春130024(王恩波) |
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| 基金项目： | 国家自然科学基金资助的项目. |
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| 摘 要： | 本文利用DSC, TG-DTA, X射线衍射, 变温红外光谱和溶解性试验方法, 系统地研究了Keggin结构杂多酸HnXM12O40(X=Si, P, Ge; M=Mo, W)的热稳定性, 提出杂多化合物热分解的新判据, 给出了Keggin结构杂多酸的热分解过程, 推导出预测热分解温度的半经验公式。
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| 关 键 词： | 红外分光光度法 杂多酸 Ｘ射线衍射分析 热稳定性 钨酸 示差扫描量热法 热重量分析 硅酸 钼酸 锗酸 |
Study on thermal property of heteropolyacids with keggin structure |
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| Abstract: | In this paper, the thermal stability of heteropolyacids with Keggin struc ture HnXM12O40 (X=Si, P, Ge; M=Mo, W) were studied systematically by DSC, TG-DAT, X-ray diffraction, IR spectra at various temperatures and solubility experimental methods. The new criterion of thermal decomposition for heteropoly compounds was proposed. The mechanism of thermal decomposition for heteropolyacids with Keggin structure was presented. A semi-empirical equation being used to predict the thermal decomposition temperatures was obtained. The reaction order and activation energy in every step of loss weight was calculated. |
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| Keywords: | INFRARED SPECTROPHOTOMETRY HETEROPOLYACID X-RAY DIFFRACTION ANALYSIS THERMAL STABILITY TUNGSTIC ACID DIFFERENTIAL SCANNING CALORIMETRY THERMOGRAVIMETRY SILICIC ACID MOLYBDIC ACID |
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