Year: 2026
Type: article
Abstract: Solid-phase equilibria in the GeSb2Te4-SnSb2Te4-Sb2Te3 subsystem of the GeTe-SnTe-Sb2Te3 system were investigated by powder X-ray diffraction method.Alloys were synthesized from previously prepared binary compounds by melting, quenching from the liquid state, and subsequent annealing at 800 K for 800 h.It was established that the GeSb2Te4-SnSb2Te4 and GeSb4Te7-SnSb4Te7 sections form continuous series of substitutional solid solutions with tetradymite-like layered structures.In both systems, the lattice parameters increase systematically with increasing Sn content, consistent with Vegard's law.In contrast, the GeSb6Te10-"SnSb6Te10" section is characterized by limited solid solubility.Based on the experimental results and literature data, the solid-phase equilibrium diagram of the GeSb2Te4-SnSb2Te4-Sb2Te3 system at 300 K was constructed.The diagram contains four single-phase regions, four two-phase regions, and one three-phase region.The obtained results provide new information on phase relations and compositional stability in the Ge-Sn-Sb-Te system and are useful for the development of functional layered chalcogenide materials.
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W7166687481