本文介绍一种新型多功能热物性测定仪,一次实验完成相变储热材料的潜热、相变温度、固相和液相的真比热、导温系数和导热系数测定。利用所建立的准稳态过程及基于对相变过程中热传导机理的分析,得到了判断相变温度的依据和计算相变潜热的公式,并实现对材料固相和液相的C_p、α、λ的测定。相变潜热偏差为2～3%,C_p偏差在±2%以内,α偏差在8.5%以内,λ偏差在10～12%以内。文中还对误差进行了分析。 In this paper, a new multifunctional thermophysical analyzer is introduced. The latent heat, phase transition temperature, true specific heat of solid phase and liquid phase, thermal conductivity coefficient and thermal conductivity of phase change thermal storage material are tested in one experiment. Based on the established quasi-steady state process and the analysis of the heat conduction mechanism in the phase transition process, the basis for judging the phase transition temperature and the formula for calculating the latent heat of phase transformation are obtained, and the C_p, α, Measurement of λ. The latent heat of phase change is 2 ~ 3%, the deviation of C_p is within ± 2%, the deviation of a is within 8.5%, and the deviation of λ is within 10 ~ 12%. The article also analyzes the error.