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Semiconductor Physics, Quantum Electronics & Optoelectronics. 2005. V. 8, N 2. P. 081-085.
Polyassociative thermodynamical model of A2B6 semiconductor melt and phase equilibrium in Cd-Hg-Te system:
Optimization of the thermodynamical functions of the model and
quasi-binary structural diagram of Cd-Hg-Te system
1Zhitomir State Technological University, 103, Chernyakhovskiy Str., 10005 Zhitomir, Ukraine
E-mail:moskvin@us.ziet.zhitomir.ua
Abstract. Within the frames of the model of the polyassociative solutions the
comparative analysis was performed of the formation parameters of multi-atom
complexes in CdTe and Hg-Te systems. It was shown, that thermodynamical properties
of the studied systems can be described in the supposition of the presence in the liquid
phase of the ATe, A2Te3, ATe2, A2Te (A = Cd, Hg) and free Te, Cd, Hg atoms. In
accordance with the model of polyassociative solutions the data on p–T–x equilibrium in
the region of quasi-binary cross-section of Cd-Hg-Te system structural diagram were
obtained. It was shown, that the mixing effects in the three-component liquid phase are
satisfactorily described by the formation of CdHgTe and CdHgTe3 associates. The good
correspondence of the calculations and experiment in the high temperature part of the
Cd-Hg-Te system structural diagram was achieved.
Keywords: phase equilibrium, polyassociative model.
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