热波理论的应用——良导热体热导率的动态法测量

An application of the theory of thermal wave: dynamic measure of the heat conductivity of a good thermal conductor

介绍了根据热波理论用动态法测量导体热导率的实验.其特点是当热量在样品中传播时,样品中各点的温度不像稳态法那样必须保持恒定.只要给定适当边界条件,样品上各点温度均可随时间作简谐变化,利用这种变化可计算出样品材料的热导率.

<Abstrcat>An experiment, which avoids need in the steady-state method that keeps the temperature of the whole sample unchanged, is replaced here to measure the heat conductivity of the thermal conductor using the dynamic state method based on the theory of thermal wave. When a proper boundary condition is fixed, the temperature of any point in the sample will present a simple harmonic variance with time, and further we can figure out the conductivity using this variance.