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Phase equilibria in the Bi/sub 2/Se/sub 3/-Bi/sub 2/Te/sub 3/-Te-Se system

Journal Article · · Inorg. Mater. (Engl. Transl.); (United States)
OSTI ID:6092401
The authors studied and constructed the phase diagram of polythermal cuts passing from their ternary delta-solid solution corresponding to the formula Bi/sub 2/Te/sub 2.85/Se/sub 0.15/ to tellurium, a mixture of tellurium and selenium used in the ratio of Te:Se = 1:1, and selenium, by methods of physicochemical analysis for the first time. The parts of the radial cut of the Bi-Te-Se ternary system originating from the angle corresponding to bismuth, within the boundaries of 0-40 atom % Bi, are quasi-binary and of the eutectic type below the temperatures of the end of crystallization. Doping of solid solutions of the Bi/sub 2/Se/sub 3/-Bi/sub 2/Te/sub 3/ system with a chalcogen in a ratio different from the starting melt results in a change in not only the composition of the initially separated delta-solid solutions but also the compositions of the delta- and ..beta..-phases at the end of crystallization.
Research Organization:
A.A. Baikov Institute of Metallurgy (USSR)
OSTI ID:
6092401
Journal Information:
Inorg. Mater. (Engl. Transl.); (United States), Journal Name: Inorg. Mater. (Engl. Transl.); (United States) Vol. 23:11; ISSN INOMA
Country of Publication:
United States
Language:
English