Thermodynamic characteristics of praseodymium in the gallium–aluminum eutectic melt

Аннотация

The Ga–Al eutectic melt saturated with praseodymium was studied in the temperature range 572–1076 K by electromotive force (emf) method relative to the reference electrode (In_L + PrIn₃, where L is the liquid phase) in a LiCl–KCl–CsCl eutectic electrolyte. The partial molar thermodynamic functions (enthalpy, entropy, and Gibbs energy) of praseo dymium in a Ga–Al eutectic melt were calculated. According to the emf measurements of the two-phase Pr–Ga–Al_L + intermetallic compound alloys equilibrated with the Ga–Al eutectic melt saturated with praseodymium, there are intermetallic compounds PrGa₆, PrGa₄, and Pr_0.22Ga_0.78(PrGa₂) in the temperature ranges 572–741, 741–883, and 883–1076 K, respectively.