导温系数是宇航和能源部门应用的许多材料重要热物性参数之一。本文论述了相对温升法测量导温系数的原理、方法和实验结果。并与当前国内外通用的方法进行了对比。结果表明,当实验条件符合理论模型时,两种方法的结果一致,而当偏离理论模型时,该方法能获得较高的精度。 The thermal coefficient is one of the important thermophysical parameters of many materials used by the aerospace and energy sectors. This paper discusses the principle, method and experimental results of the relative temperature rise method for measuring the temperature coefficient. And compared with the current common methods at home and abroad. The results show that when the experimental conditions are in line with the theoretical model, the results of the two methods are consistent, and when the theoretical model deviates from the theoretical model, the method can obtain higher accuracy.