Thermodynamics Research Center / ThermoML | Thermochimica Acta

ABSTRACT

Although vanadium is commonly used as an additive in the steel production, literature data for thermophysical properties of vanadium around the melting point are sparse and show, where available a variation over a wide range. This manifests especially in the melting temperature (variation of +-30 K), heat of fusion, or specific enthalpy. This recent work presents the results of thermophysical measurements on vanadium including normal spectral emissivity at 684.5 nm. The aim was to obtain another full dataset of properties (enthalpy, heat of fusion, electrical resistivity, thermal conductivity, emissivity) of liquid vanadium to either confirm existing recommendations for certain properties or presenting newer measurements for comparison leading towards such recommendations. Summarizing, the following results for thermophysical properties at the melting point have been obtained: radiance temperature at melting (650 nm) Tr,m = 1993 K, melting temperature Tm = 2199 K, normal spectral emissivity at melting (684.5 nm) a = 0.353. An observed feature of all measured data and results is, that a much better agreement with literature references exists for the liquid phase than in the solid state, thus we have restricted the presentation to liquid vanadium.