Thermodynamic properties of the ternary system InSb–NiSb–Sb in the temperature range 640–860 K

Abstract

The ternary InSb–NiSb–Sb system has been studied by X-ray diffraction and by potentiometry. The electromotive forces (EMF) have been measured in the temperature range 640<T/K<860 by using the following galvanic cell:−In/InClinKCl+LiClliqInxNiySb1−x-y+with x (0.075<x<0.498) and y (0<y<0.359). The investigated samples are located on the following lines of the Gibbs triangle: InSb–Ni0.33Sb0.66, InSb–Ni0.48Sb0.52, InSb–NiSb, Sb–(InSb)0.75(NiSb)0.25, Sb–(InSb)0. 5(NiSb)0.5, Sb–(InSb)0.25(NiSb)0.75. From these measurements, the values of the partial molar thermodynamic functions (Δμ°m,In, ΔH°m,In, ΔS°m,In) (data at reference pressure p0=105 Pa), for the liquid InSb alloy, for the three solid heterogeneous regions InSb–NiSb2–Sb, InSb–NiSb1±δ?–NiSb2, InSb–NiSb1±δ, for six ternary liquid–solid alloys, have been calculated.