CaCl2·6H2O作为一种常低温相变材料(PCM)在蓄热节能领域具有广阔应用前景,但其严重的过冷使应用受到限制.为解决这一问题,本工作基于无机盐成核原理,用溶液法制备了各种掺杂的CaCl2·6H2O晶体,并对其进行了热分析.在开放体系和室温冷却环境下,研究了不同成核剂的添加方法及工艺参数对CaCl2·6H2O的过冷特性的影响及其变化规律.实验结果表明,硼砂和SrCl2·6H2O是CaCl2·6H2O优良的成核剂,分别能将CaCl2·6H2O过冷度降低至2℃和接近0℃,有效地解决了过冷.
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