【摘要】 在传统瞬态平面热源(Transient plane source, TPS)法测量理论的基础上,提出了一种可用于测量单试件材料导热系数的TPS单面法。通过研究半无限边界条件下瞬态热传导问题,推导了TPS单面法的理论公式,分析了测量过程中探头热容对测量结果的影响,建立了相应的数学补偿模型,并在常温常压下利用hot disk探头对不同材料开展了一系列实验。结果表明, TPS单面法测量材料导热系数的相对误差小于5%,相对标准偏差低于3%。该方法具有良好的准确度和重复性,为不满足标准TPS法测试要求的单试件材料提供了可行的测量手段。更多还原

【Abstract】 Based on the traditional measurement theory of transient plane source(TPS) technique, single-side TPS method is proposed for measuring the thermal conductivity of single specimen. The problem of transient heat conduction in a semi-infinite boundary condition is studied and the theoretical formula of single-side TPS method is deduced. During the measurement, the influence of the probe heat capacity on the results is analyzed and the corresponding mathematical compensation model is established, and a series of experiments on different materials are conducted by hot disk probe at normal temperature and pressure. The results show that the relative error with the single-side TPS method is less than 5% and the relative standard deviation is no greater than 3%. This method has high accuracy and good reproducibility, which provides a feasible measuring method for single material that does not meet the requirements of the standard TPS theory.更多还原