Abstract: In order to solve the problem of difficult forming and low heat conduction of molten salt phase change materials, a method of in-situ reaction of micron aluminum nitride was designed to fabricate ceramic-based thermal conduction framework, which can absorb molten salt and form the ceramic-based composite phase change materials (CPCMs). The effects of water content and forming pressure on the properties of CPCMs were studied, which shows the optimum water addition of 15%, the best molding pressure of 30 MPa. Hydrolytic alumina (h-Al2O3) formed by in-situ reaction is found a flower like structure in SEM photos, which can absorb composite salts and maintain the structure without collapse. TG-DSC and thermal conductivity tests illustrate that the CPCMs have a 182.4 J/g phase change enthalpy and a 4.928 W/(m·K) thermal conductivity. After 50 cycles, there is almost no attenuation on the enthalpy of CPCMs, which possess good cycle stability. Their excellent properties are attri-buted to the ceramic-based thermal conduction framework formed by in-situ reaction.
杨波, 王启扬, 杨肖, 杨冬梅. 原位反应制备陶瓷基复合相变材料及其工艺研究[J]. 材料导报, 2020, 34(Z1): 128-131.
YANG Bo, WANG Qiyang, YANG Xiao, YANG Dongmei. Preparation and Technology of Ceramic-based Composite Phase ChangeMaterials by In-situ Reaction. Materials Reports, 2020, 34(Z1): 128-131.
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2020, Vol. 34 
