Thermodynamic Description of Systems Cd-Te, Hg-Te and Cd-Hg-Te Using the Model of Associated Liquid Solution

TL;DR

This paper develops a thermodynamic model using the Sub-regular Associated Solution approach to accurately describe the phase diagrams of Cd-Te, Hg-Te, and Cd-Hg-Te systems, aligning well with experimental data.

Contribution

It introduces a thermodynamic modeling method for these systems using the S.A.S model, providing detailed parameters for phase diagram prediction.

Findings

The model indicates a stronger associated character in Cd-Te than Hg-Te.

Calculated phase diagrams match well with experimental data.

Thermodynamic quantities like enthalpy and entropy are derived for the systems.

Abstract

. This study is devoted in the search of a model describing the best possible liquid and solid phases of the systems Cd-Te, Hg-Te, and Cd-Hg-Te. For the liquid phases, we used the model of Sub-regular Associated Solution (S.A.S). Thermodynamic quantities of dissociation, for the associated species are calculated by the numerical resolution of the phase equilibrium equations. The results of this calculation indicate a more marked associated character in Cd-Te than in Hg-Te with a pseudo-regular behavior of the binary liquid Cd-Te. The phases diagrams calculated from thermodynamic quantities, describe very well the experimental diagrams especially for the binary systems. This models used to calculate the parameters of interactions, enthalpy and entropy of dissociation and mixture, this thermodynamic quantities not measurable used to describe phases diagrams and other studies.