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Phase Equilibria in the Quasi-Ternary System Cu2Se-GeSe2-Sb2Se3

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Abstract

The isothermal section of the quasi-ternary system Cu2Se-GeSe2-Sb2Se3 at 620 K (347 °C) and the liquidus surface projection of the system onto the concentration triangle have been built. The sections Cu2GeSe3-CuSbSe2 and Cu2GeSe3-Sb2Se3 are quasi-binary systems of the eutectic type. The eutectic point coordinates in the Cu2GeSe3-Sb2Se3 system are: 70 mol.% Sb2Se3-30 mol.% Cu2GeSe3, 780 K (507 °C). In the Cu2GeSe3-CuSbSe2 system the eutectic point coordinates are: 10 mol.% Cu2GeSe3-90 mol.% CuSbSe2, 750 K (477 °C). The liquidus surface projection is represented by the fields of the primary crystallization of Cu2Se (high-temperature modification), Cu8GeSe6 (high- and low-temperature modifications), Cu2GeSe3, GeSe2, Sb2Se3, CuSbSe2 and Cu3SbSe3 compounds. The fields are separated by 9 nonvariant points corresponding to the processes in the quasi-binary systems and 7 nonvariant points at the planes of the respective nonvariant processes in the quasi-ternary sub-systems Cu2Se-Cu2GeSe3-CuSbSe2, Cu2GeSe3-Sb2Se3-CuSbSe2, Cu2GeSe3-GeSe2-Sb2Se3. Solid solubility in binary and ternary compounds does not exceed 5 mol.%, no quaternary phases were found.

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Authors and Affiliations

  1. Department of Chemistry and Technology, Eastern European National University, Voli Ave, 13, 43000, Lutsk, Ukraine

    I. A. Ivashchenko, I. D. Olekseyuk, O. F. Zmiy & O. M. Strok

  2. JE «Modern-Expo» Ltd., Galvanic Station, 4 Rivnenska St., 45603, Strumivka, Lutsk District, Ukraine

    T. A. Ostapyuk

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  1. I. A. Ivashchenko
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  2. T. A. Ostapyuk
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  3. I. D. Olekseyuk
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  4. O. F. Zmiy
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  5. O. M. Strok
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Correspondence to I. A. Ivashchenko.

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Ivashchenko, I.A., Ostapyuk, T.A., Olekseyuk, I.D. et al. Phase Equilibria in the Quasi-Ternary System Cu2Se-GeSe2-Sb2Se3. J. Phase Equilib. Diffus. 41, 827–834 (2020). https://doi.org/10.1007/s11669-020-00840-2

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