The quasi-ternary CdSe–Ga₂Se₃–Bi₂Se₃ system

Chem. Met. Alloys 3 (2010) 5-11

https://doi.org/10.30970/cma3.0110

S.M. SOSOVSKA, I.D. OLEKSEYUK, O.V. PARASYUK

Differential-thermal analysis, X-ray diffraction, and metallography were used to study the interaction between the components of the quasi-ternary CdSe–Ga₂Se₃–Bi₂Se₃ system. Phase diagrams of four polythermal sections, the isothermal section at 670 K, as well as a projection of the liquidus surface have been constructed. The projection of the liquidus surface consists of six fields of primary crystallization of the phases, which are separated by 12 monovariant curves and 11 invariant points. The type of mono- and invariant processes in the system has been investigated and the coordinates of the invariant points have been determined. The system is triangulated by the quasi-binary section CdGa₂Se₄-Bi₂Se₃ into two sub-systems CdSe–CdGa₂Se₄–Bi₂Se₃ and CdGa₂Se₄–Ga₂Se₃–Bi₂Se₃. The present results can be employed for the growth of CdGa₂Se₄ single crystals from non-stoichiometric melts.

Projection of the liquidus surface of the CdSe–Ga₂Se₃–Bi₂Se₃ system.

Keywords

Thermal analysis / Chalcogenide / Phase diagram / Isothermal section / Liquidus surface