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Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (15): 1725-1730.     Next Articles

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体系Mg(NO3)2-MgCl2-H2O作为相变储能材料的相图预测

周权宝,尹霞*, 汪琼,王成   

  1. (湖南大学化学化工学院 长沙 410082)
  • 投稿日期:2011-04-15 修回日期:2011-05-31 发布日期:2011-06-23
  • 通讯作者: 尹霞 E-mail:yinxia0405@yahoo.com.cn
  • 基金资助:

    湖南大学理科化学基地

Phase Diagram Prediction of the System Mg(NO3)2-MgCl2-H2O as Phase Change Materials

ZHOU Quan-Bao, YIN Xia, WANG Qiong, WANG Cheng   

  1. (College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082)
  • Received:2011-04-15 Revised:2011-05-31 Published:2011-06-23
  • Contact: Xia YIN E-mail:yinxia0405@yahoo.com.cn

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The modified BET thermodynamic model was applied to predict phase diagram of the system Mg(NO3)2-MgCl2-H2O from 273 to 373 K, in which two eutectic points were found. The exothermal and endothermal behavior of the predicted eutectic points were measured and the results showed that the ternary eutectic point Mg(NO3)2•6H2O(45.6%)-Mg(NO3)2•2H2O(29.6%)-MgCl2•6H2O(24.8%) has poor energy-storage ability, while another binary eutectic point Mg(NO3)2•6H2O(61.6%)-MgCl2•6H2O(38.4%) has good exothermal and endothermal ability near the melting temperature with melting heat 136.8 J•g－1 determined by differential thermal analysis (DTA), and is expected to be used for the potential phase change material.

Key words: BET model, solubility, Mg(NO3)2, MgCl2, phase change material

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