Funct. Mater. 2021; 28 (2): 375-380.

doi:https://doi.org/10.15407/fm28.02.375

Solubility calculation of poorly soluble components in solid α-phase from thermodynamic parameters of interacting elements

O.P.Shcherban, O.A.Datsenko

National Science Center "Kharkiv Institute of Physics and Technology", 1 Academichna Str., 61108 Kharkiv, Ukraine

Abstract: 

Parametric expressions are obtained for determining the limiting solubility of poorly soluble components in the solid α-phase by the thermodynamic parameters of interacting elements. In the derivation of the expressions, two approaches are considered. The first approach uses a temperature-independent limiting distribution coefficient for behavior of an ideal system. In the second method, the calculation is carried out taking into account the deviation from ideal behavior through the temperature-dependent partial enthalpy of dissolution of the second component in the solid α-phase. The results of calculations of the solubility of the second component for such systems as Cd-Tl, Zn-Sn, Te-As, Te-Cu using the obtained expressions are presented. It was shown that the solubility of the second component is less than 1 at.% in the investigated systems. Relative deviations of the limiting solubility values obtained by different calculation methods have been determined. The interpretation for the scatter in the calculated data on the solubility of poorly soluble components in the solid α-phase is given.

Keywords: 
solid α-phase, solubility, interfacial equilibrium, limiting separation coefficient, partial enthalpy of dissolution.

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