Chemical Science International Journal

Phase Equilibria in the YbTe-PbTe-Bi2Te3 System

K. D. Rasulova

Department of Chemistry, Baku State University, Z. Khalilov, 23, Baku, Az1148, Azerbaijan

Z. S. Aliev

Thermodynamics of Functional Inorganic Materials, Institute of Catalysis and Inorganic Chemistry, ANASH. Javid, Baku, Az1143, Azerbaijan

A. Y. Zavrajnov

Department of Chemistry, Voronej State University, 1, Universitetskaya pl., Voronezh, 394006, Russia

S. Z. Imamalieva

Thermodynamics of Functional Inorganic Materials, Institute of Catalysis and Inorganic Chemistry, ANASH. Javid, Baku, Az1143, Azerbaijan

M. B. Babanly *

Thermodynamics of Functional Inorganic Materials, Institute of Catalysis and Inorganic Chemistry, ANASH. Javid, Baku, Az1143, Azerbaijan

*Author to whom correspondence should be addressed.

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Abstract

The phase equilibria in the YbTe-PbTe-Bi₂Te₃ system were investigated by means of differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscope with energy dispersive analysis (SEM-EDS) techniques. Isothermal sections at 300 and 800 K, the liquidus surface projection as well as some isopleth sections were experimentally plotted. The already reported ternary YbPbTe₂, YbBi₂Te₄ and YbBi₄Te₇ compounds were not confirmed. Wide solid solubility field of initial binary compounds was revealed and a solubility of YbTe in the ternary tetradymite-like layered compounds in the PbTe-Bi₂Te₃ system are found to be about 2 mol%.

 

Keywords: Phase diagram, liquidus surface, isothermal sections, ytterbium telluride, lead telluride, bismuth telluride, solid solutions

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