Phase Equilibria in the Cu2Se−SnSe−CuSbSe2 System

Ismailova E., Mashadieva L., Bakhtiyarly I., Babanlı M.

Russian Journal of Inorganic Chemistry, vol.64, no.6, pp.801-809, 2019 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 64 Issue: 6
  • Publication Date: 2019
  • Doi Number: 10.1134/s0036023619060093
  • Journal Name: Russian Journal of Inorganic Chemistry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.801-809
  • Keywords: copper antimony selenides, liquidus surface, phase diagram, tin monoselenide
  • Open Archive Collection: Article
  • Azerbaijan State University of Economics (UNEC) Affiliated: Yes

Abstract

Phase equilibria in the Cu2Se−SnSe−CuSbSe2 system were studied by differential thermal and X-ray powder diffraction analyses. Alloys were obtained by alloying of the preliminarily synthesized and identified initial compounds in a vacuum with subsequent annealing at 650 K for 500 h. Characteristic plots describing this system were constructed, namely, the polythermal sections SnSe−Cu3SbSe3, Cu2Se−[A], and CuSbSe2−[B], where [A] and [B] are the alloys of the compositions (SnSe)0.5(CuSbSe2)0.5 and (Cu2Se)0.5(SnSe)0.5, respectively; the isothermal section of the phase diagram at 300 K; and the projection of the liquidus surface. It was shown that this system is a quasi-ternary section of the quaternary system Cu−Sn−Sn−Se and is characterized by invariant equilibria: a transient one and a eutectic one. Fields of primary crystallization of phases and the types and coordinates of in- and monovariant equilibria were found. Wide regions of solid solutions based on SnSe and CuSbSe2 were revealed.