微机控制的光热辐射技术测量金属的热扩散系数

MEASUREMENT OF THE THERMAL DIFFUSIVITY OF METALS USING PHOTOTHERMAL RADIOMETRY CONTROLLED BY MICROCOMPUTER

介绍用光热辐射技术测量材料热扩散系数的基本原理和微机控制测量装置．给出了几种常见金属材料热扩散系数的测量结果，并对影响测量结果的因素进行了讨论．实验结果表明，该技术是一种快速测量材料热学性质的有效手段．

Based on the principle of measurement for the thermal diffusivity using the photothermal radiometry technique,the measurement set-up controlled by a microcomputer is introduced. Measurement results of the thermal diffusivity of several common metals are given,and some factors which affect the measurement results are discussed. The experimental results show that this new technique is a useful tool for fast measurement of thermal properties.