据热扩散率最小离散度确定导热系数的新热探针法

本介绍了一种新的用热探针测导热系数的方法，它与传统方法不同，不是从模型的算式中直接求出导热系数，而是从误差分析出发，据导热系数λ误差最小时热扩散率α的离散度也最小的原理导出的方法。

A New Thermal Probe Method for Determining Thermal Conductivity Based on the Minimal Dispersion of Thermal Diffusivity

A new thermal probe method for the measurement of thermal conductivity hasbeen presented based on error analysis and the principle that the dispersion of thermaldiffusivity is certain to be a minimum if the error of thermal conductivity is a minimum.The method differs from the traditional method in that the thermal conductivity is notobtained directly from the formula of the model, but by finding the minimal dispersion ofthermal diffusivity. It has been proved by theory and experiments that the method has veryhigh accuracy because the errors of the subjectivity and the errors caused by thatexperiment not satisfied with the model can be obviated. The software for the dataprocessing has been written and some kinds of liquids and powder materials have beenmeasured by the method.