适用于金属材料的热质两步模型及普适导热定律

Thermomass Two Step Model and General Heat Conduction Law for Metals

基于爱因斯坦质能关系提出的热质理论揭示了热量传递的本质,具有广泛的应用前景。对于电介质材料已经建立了完善的热质模型和普适导热定律,然而金属中电子是热量的主要载体,在超快速加热条件下存在电子和晶格之间的非平衡热传导,需要对平衡态的热质模型进行修正。本文提出了一种适用于金属材料的热质两步模型,并且建立了相应的普适导热定律,为实验研究超快速热量传递机制奠定了理论基础。

Based on Einstein＇s mass-energy relation, the thermomass model reveals the essence of the heat transfer process and therefore has a great potential in engineering applications. The thermomass model and general heat conduction law for dielectrics have been fully developed. In metals, the electrons are the main energy carriers and the non-equilibrium heat conduction between electrons and lattices is dominant in ultra-short time scale. The equilibrium thermomass model needs to be modified. In this paper, a thermomass two step model has been proposed and a general heat conduction law has been established accordingly, which builds the theoretical foundation of the experimental study of ultra-fast heat conduction mechanisms.