Precision measurements of the thermal conductivity, electrical resistivity, and Seebeck coefficient from 80 to 400 K and their application to pure molybdenum

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Abstract
A longitudinal heat‐flow technique for precise measurement of thermal conductivity,electrical resistivity, and Seebeck coefficient over the temperature range from 80 to 400 K is described. The basis of the technique is the use of a calibrated platinumresistancethermometer to provide in situcalibrations of specimen thermocouples. The total determinate errors at 273 K are ± 0.23% for electrical resistivity, ± 0.49% for thermal conductivity, and ± 0.07 μV/K for the Seebeck coefficient when Pt wire is used as the reference. Experimental results on two high‐purity molybdenum specimens with cross‐sectional areas differing by a factor of four are presented to demonstrate the system precision and low level of indeterminate erros.