摘要
利用已有的热力学数据,对硫酸钠和硫酸钾相变材料的热力学稳定性、饱和蒸汽压等热物性进行了计算分析,探讨了莫来石作为硫酸盐相变材料基体的可行性。由热力学计算和分析可以看出,硫酸钠和硫酸钾在1100℃的高温下发生分解反应的平衡常数都极小,很难发生分解。硫酸钠即使在1200℃的饱和蒸气压也很低,是一种很有前途的相变材料,同时混合熔盐也表现出了非常低的蒸气压,计算数据和实验的热失重分析相吻合。研究结果表明,通过热物性相关参数的设计计算可以为相变储能材料的实际应用提供依据。
The feasibility of mullite as the matrix for sulfate salts-based phase change materials was studied by analyzing the thermophysical properties of sodium sulfate and potassium sulfate phase change materials such as their thermodynamic stability and saturated vapor pressure. The results indicated sodium sulfate and potassium sulfate are difficult to decompose with low equilibrium constant at 1100~C. Sodium sulfate is a promising phase change matedal for its low saturated vapor pressure even at 1200~C; its mixed molten salts also exhibit very low vapor pressure; the calculated data and the experimental data coincide. The design and calculation of the relevant parameters can benefit the practical application of phase change materials.
出处
《陶瓷学报》
CAS
北大核心
2013年第1期41-45,共5页
Journal of Ceramics
基金
西南科技大学博士基金项目(编号:07ZX7128)
四川省教育厅基金项目(编号:10ZB013)资助
关键词
硫酸盐
热物性
相变
储能
sulfate salts
thermophysical properties
phase change
energy storage
