Experimental investigation of the solid phase equilibria at 300 K in the SnBi2Te4-PbBi2Te4-Bi2Te3 system Експериментальне дослідження твердофазної рівноваги у системі SnBi2Te4-PbBi2Te4-Bi2Te3 при 300 К

Aghazade A., Orujlu E., Salimov Z., Mammadov A., Babanlı M.

Physics and Chemistry of Solid State, vol.24, no.3, pp.453-459, 2023 (ESCI, Scopus) identifier

  • Nəşrin Növü: Article / Article
  • Cild: 24 Say: 3
  • Nəşr tarixi: 2023
  • Doi nömrəsi: 10.15330/pcss.24.3.453-459
  • jurnalın adı: Physics and Chemistry of Solid State
  • Jurnalın baxıldığı indekslər: Emerging Sources Citation Index (ESCI), Scopus
  • Səhifə sayı: pp.453-459
  • Açar sözlər: SnBi2Te4-PbBi2Te4-Bi2Te3 system, SnBi6Te10–PbBi6Te10 section, solid phase equilibria, thermoelectric materials, topological insulators
  • Açıq Arxiv Kolleksiyası: Məqalə
  • Adres: Bəli

Qısa məlumat

The phase equilibria of the SnBi2Te4-PbBi2Te4-Bi2Te3 system were experimentally studied using differential thermal analysis (DTA), X-ray diffraction (XRD), and scanning electron microscopy (SEM) techniques. According to the experimental results, the isothermal section of the system at 300 K were constructed and 4 single-phase and 3 two-phase regions were identified. It was shown that along with previously confirmed SnBi2Te4–PbBi2Te4 and SnBi4Te7–PbBi4Te7 sections, SnBi6Te10–PbBi6Te10 section forms continuous series of solid solutions with a tetradymite-type layered structure. Lattice parameters of solid solutions were determined by full-profile Rietveld refinements and results show that both a and c parameters increase linearly with the Pb concentration according to Vegard's law. This study can help elucidate the phase equilibria of the SnTe-PbTe-Bi2Te3 pseudo-ternary system which provides important information for the design of new tetradymite-type layered phases with topological insulator and thermoelectric properties.