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热整流现象是近年来在纳米系统中发现的一种特殊热传导现象,具有重要的应用前景,但是缺乏明确的物理解释和宏观物理图像。本文基于热质理论将导热过程与流体力学相类比,论证了热质运动的空间惯性力可以导致非对称导热介质中的热整流现象,并举例分析了硅纳米薄膜中的热整流效应。热质理论预测的热整流系数可达40%,足以满足构建热晶体管或者逻辑门的需求。
Thermal rectification phenomenon is a special heat conduction phenomenon found in nanosystems in recent years. It has important application prospect, but lack of clear physical explanation and macroscopic physical image. In this paper, based on thermal theory, the thermal conduction process is compared with hydrodynamics. It is demonstrated that the thermal inertia of thermal mass motion can lead to thermal rectification in asymmetric thermal media, and the thermal rectification effect in silicon nanofilms is analyzed. The thermal theory predicts a thermal rectification factor of up to 40%, enough to meet the needs of building thermal transistors or logic gates.