摘要：采用混合烧结法工艺, 将三元氯盐体系Na Cl-KCl-MgCl2相变材料与氧化镁陶瓷基体进行复配并制备定型材料, 考察成型压力、烧成温度和盐含量对材料成型的影响, 对最佳成型条件的材料进行储热性能表征。结果表明:当盐的质量分数为50%、烧成温度为450℃、成型压力为8 MPa时复合材料成型效果较好, 相变材料无渗出、体积变化较小且复合材料致密度较高;DSC测试结果表明, 所制备的复合相变储热材料的相变温度为399.8℃, 相变潜热为129.6 J/g。
关键词：相变储热材料；陶瓷基体；成型工艺
Abstract：The mixed sintering method was used to shape the ternary chlorine salt system Na Cl-KCl-MgCl2 with magnesium oxide ceramic matrix. The influence of pressing pressure, sintering temperature and salt content on the material molding were studied and the heat storage performance was tested. The experimental results show that when the preparation conditions are the 50 % salt content, sintering temperature of 450 ℃ and 8 MPa pressing pressure, the preparation effect is better. At that time the phase change material is no seepage, the composite material has a smaller volume change and a higher density. The DSC test results show that the phase transition temperature of composite phase change heat storage material is 399.8 ℃, and the phase change latent heat is 129.6 J/g.
Keywords: phase change material；ceramic matrix；molding process
