| 四元体系LiNO3-Mg(NO3)2-NH4NO3-H2O相图预测及相关相变储能材料的研究 |
| Phase Diagram Prediction of the Quaternary System LiNO3-Mg(NO3)2-NH4NO3-H2O and Research of Related Phase Change Materials |
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| 摘要: 应用修正的BET热力学模型对Mg(NO3)2-NH4NO3-H2O三元体系和LiNO3-Mg(NO3)2-NH4NO3-H2O四元体系在273~320 K的相图进行预测，并找到一个相变温度较低的四元共晶点Mg(NO3)2·6H2O-LiNO3·3H2O-NH4NO3，其质量百分数组成为：25.5%的硝酸铵，28.4%的硝酸锂，13.8%的硝酸镁和32.3%的水，通过实验对共晶点组成材料的吸放热行为进行测定，发现其熔化温度为286.3 K，且DSC测试其相变热焓为192.7 J·g-1，表明该材料可用作潜在的低温相变储能材料。 |
| 关键词: BET模型 溶解度 相图 LiNO3-Mg(NO3)2-NH4NO3-H2O 相变储能材料 |
| 基金项目: |
| Abstract: The modified BET thermodynamic model was applied to predict phase diagram of the systems Mg(NO3)2-NH4NO3-H2O and LiNO3-Mg(NO3)2-NH4NO3-H2O from 273 K to 320 K, in which one quaternary eutectic point (its composition: 25.5% NH4NO3, 28.4% LiNO3, 13.8% Mg(NO3)2 and 32.3% H2O·) with low melting temperature was found. The exothermal and endothermal behavior and DSC measurement of the predicted eutectic point were measured and the results showed that the melting temperature is 286.3 K and melting heat is 192.7 J·g-1，and the predicted material is expected to be used for the potential low temperature phase change material. |
| Keywords: BET model solubility phase diagram LiNO3-Mg(NO3)2-NH4NO3-H2O phase change material |
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| 尹 霞,陈启元,王文磊,曾德文.四元体系LiNO3-Mg(NO3)2-NH4NO3-H2O相图预测及相关相变储能材料的研究[J].无机化学学报,2012,28(9):1873-1877. |
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