Normal spectral emissivity and heat capacity of Pd-Fe melts measured at constant pressure under electromagnetic levitation with a static magnetic field

The normal spectral emissivity at 807 and 940 nm and heat capacity at constant pressure of Pd-Fe melts were measured under electromagnetic levitation with a static magnetic field. The samples were made of Fe of mass purity 99.9985%. The present emissivity of Fe melts was relatively low compared with previously reported data using Fe with purity lower than 99.95% mass purity. The spectral emission of the Fe melts was ana-lyzed using their normal spectral emissivity obtained from the Drude model. The excess heat capacity of Pd-Fe melts was evaluated from the measured heat capacity of Pd-Fe melts. Applying the Lupis-Elliot rule, we concluded from the obtained excess heat capacity that the enthalpy of mixing and excess entropy of the Pd-Fe melts should be negative. The composition dependence of the enthalpy of mixing, excess entropy, and excess Gibbs energy of Pd-Fe melts were evaluated using data obtained in this study and the literature.