Phase equilibria in the Ag2Se-AgAsSe2-AgBiSe2 system

Inorganic Materials - 2010
G. M. Velieva1, N. B. Babanly2, V. P. Zlomanov3, M. B. Babanly1
1Baku State University, Baku, Azerbaijan
2Institute of Chemical Problems, Academy of Sciences of Azerbaijan, Baku, Azerbaijan
3Moscow State University, Moscow, Russia

Tóm tắt

Phase equilibria in the pseudoternary system Ag2Se-AgAsSe2-AgBiSe2 have been studied using differential thermal analysis, X-ray diffraction, microhardness tests, and emf measurements on silver concentration cells with Ag4RbI5 as solid electrolyte. The results are used to construct the 300-, 600-, and 800-K isothermal sections, a number of partial phase diagrams, and the liquidus projection. Several in- and univariant peritectic and eutectic equilibria and a broad region of AgBiSe2-based solid solutions are identified. The homogeneity range of the high-temperature phase of AgBiSe2 reaches −50 mol % in width (650 K), and that of the low-temperature phase is 20 mol % in width (300 K) along the AgAsSe2-AgBiSe2 constituent binary. The melting points, lattice parameters, and microhardness of the solid solutions are determined.

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Tài liệu tham khảo

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Inorganic Materials

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