Thermal properties of tantalum between 300 and 2300 K
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A subsecond pulse heating method was applied to measure the specific heat capacity, electrical resistivity, total hemispherical emissivity, and normal spectral emissivity of 99.9% pure tantalum in the form of 2-mm-diameter wire. W/Re thermocouple thermometry was applied from 300 to 2300 K, with emissivity measurements above 1300 K involving pyrometric measurements. The maximum uncertainties in the specific heat capacity and electrical resistivity were less than 3 and 1% respectively. The uncertainty of emissivity measurements was estimated as +/- 5 %. The results are compared with literature values.
Keywords:electrical conductors / electrical resistivity / hemispherical total emissivity / high temperatures / normal spectral emissivity / refractory metals / specific heat / tantalum
Source:International Journal of Thermophysics, 1999, 20, 4, 1129-1136
- 5th International Workshop on Subsecond Thermophysics, Jun 16-19, 1998, Aix-En Provence, France