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在常见的K2CO3-Na2CO3-Li2CO3三元熔盐基础上进行储热性能改性研究。选取成本较低的无机盐BaCO3和SrCO3作为添加剂,采用静态熔融法制备四元碳酸盐,运用差式扫描量热法(DSC法)、连续法等方法测试其熔点、相变潜热、分解点等热物性能。结果表明,四元碳酸盐具有相变潜热大、工作温度范围广等优点。该结果为熔盐相变材料在中高温储热领域的应用提供了依据。
In the common K2CO3-Na2CO3-Li2CO3 ternary molten salt based on the study of thermal storage properties. The low cost inorganic salts BaCO3 and SrCO3 were chosen as additive, and the quaternary carbonate was prepared by the static melting method. The melting point, the latent heat of transformation and the decomposition point were measured by differential scanning calorimetry (DSC) and continuous method. Other thermal properties. The results show that quaternary carbonate has the advantages of large phase transition latent heat, wide operating temperature range. The results provide the basis for the application of molten salt phase change materials in the field of heat storage at medium and high temperature.