Thermodynamic properties of Nd–Bi and Nd–Sn alloys were determined via electromotive force (emf) measurements at 725–1075 K. The emf measurements of an Nd–Bi alloy at mole fraction xNd = 0.20 were conducted using a solid CaF2–NdF3 electrolyte relative to pure Nd(s). The emf values from the CaF2–NdF3 electrolyte were verified in separate experiments in molten LiCl–KCl–NdCl3 where pure Nd(s) was electrodeposited. The Nd–Bi (xNd = 0.20) exhibited two-phase behavior with a peritectic reaction (L + NdBi = NdBi2) at 926 K from differential scanning calorimetry. The two-phase Nd–Bi (xNd = 0.20) was employed as a stable reference electrode in molten LiCl–KCl–NdCl3 for emf measurements of Nd–Bi (xNd = 0.15–0.40) and Nd–Sn (xNd = 0.10) alloys. The emf measurements of these alloys were reproducible during thermal cycles over 50 h and were used to calculate thermodynamic properties, including the partial molar Gibbs energy, entropy, and enthalpy.

的Nd-Bi系和Nd-Sn系合金的热力学性质进行了测定通过电动势（EMF）的测量在725-1075 K.所述摩尔分数电动势的Nd-Bi合金的测量值X的Nd = 0.20使用固体的CaF进行了2 -相对于纯Nd的NdF 3电解质。CaF 2 –NdF 3电解质的电动势值在单独的实验中在熔融的LiCl–KCl–NdCl 3中进行了验证，其中纯Nd被电沉积。根据差示扫描量热法，在926 K时，Nd-Bi（x Nd = 0.20）表现出具有包晶反应的两相行为（L + NdBi = NdBi 2）。两相Nd–Bi（x Nd = 0.20）作为熔融LiCl–KCl–NdCl 3中的稳定参比电极，用于Nd–Bi（x Nd = 0.15–0.40）和Nd–Sn（x Nd = 0.10）合金的电动势测量。这些合金的电动势测量在50小时以上的热循环过程中是可重现的，并用于计算热力学性质，包括部分摩尔吉布斯能，熵和焓。