A New Thermal Probe Method for Determining Thermal Conductivity Based on the Minimal Dispersion of Thermal Diffusivity
Zeshao Chen
Abstract
Zeshao Chen
Abstract
本文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.理论和实验证明了该方法可以消除实验不满足理论模型和测试者主观性的误差,有与热丝法相当的高精度.本方法已编成数据处理软件,方便而精确地测定了一些液体和粉末材料的导热系数.
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本文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.理论和实验证明了该方法可以消除实验不满足理论模型和测试者主观性的误差,有与热丝法相当的高精度.本方法已编成数据处理软件,方便而精确地测定了一些液体和粉末材料的导热系数.
Key concepts: Thermal diffusivity, Thermal conductivity, Dispersion (optics), Materials science, Thermal, Thermal conductivity measurement, Mechanics, Composite material