本实用新型提供一种固体材料热扩散系数随温度变化的测量装置，属于材料热物性测试技术领域。该装置包括圆柱形测试材料、铠装微细测温热电偶、温度记录仪、恒温管式炉、冷却装置和数据分析软件，铠装微细测温热电偶置于圆柱形测试材料内部，圆柱形测试材料置于恒温管式炉中，铠装微细测温热电偶与温度记录仪相连，温度记录仪连接数据分析软件，冷却装置为圆柱形测试材料降温。该方法通过测量圆柱形测试材料内沿半径方向上两个不同位置的温度随时间的变化规律，基于瞬态导热的解析解，获得关于热扩散系数的非线性方程，进而得到热扩散系数。该方法可以实现固体材料热扩散系数的随温度变化的连续测量。

The utility model provides a measuring device for the thermal diffusion coefficient of a solid material to change with temperature, which belongs to the technical field of material thermal property testing. The device includes cylindrical test material, armored micro thermocouple, temperature recorder, constant temperature tube furnace, cooling device and data analysis software. The armored micro thermocouple is placed inside the cylindrical test material for cylindrical testing The material is placed in a thermostatic tube furnace, the armored micro thermocouple is connected to the temperature recorder, the temperature recorder is connected to the data analysis software, and the cooling device cools the cylindrical test material. This method measures the temperature changes with time at two different positions along the radius of the cylindrical test material, and obtains the nonlinear equation of thermal diffusivity based on the analytical solution of transient heat conduction, and then obtains the thermal diffusivity. This method can realize the continuous measurement of the thermal diffusivity of solid materials with temperature.