本文以常用低温保温材料膨胀珍珠岩 (珠光砂 )为研究对象 ,实验测量了在稳态和非稳态传热条件下的导热性能、热扩散性能及其随温度的变化规律 ,并对两种传热条件下的绝热特性进行了分析和研究 ,为工程应用提供可靠的理论依据 ,也为低温绝热方案的选择及优化提供参考资料 In this paper, the commonly used low-temperature insulation material perlite (pearlescent sand) as the research object, the experimental measurements of the steady-state and unsteady heat transfer conditions of thermal conductivity, thermal diffusivity and its variation with temperature, and two Heat insulation conditions under the adiabatic characteristics of the analysis and research for engineering applications to provide a reliable theoretical basis, but also for the selection and optimization of low temperature insulation program to provide reference materials