Homogeneity ranges and thermodynamic properties of ternary phases in the SnTe-Bi 2Te 3-Te system

Babanlı M., Guseinov F., Dashdyeva G., Yusibov Y. A.

Inorganic Materials, vol.47, no.3, pp.235-239, 2011 (SCI-Expanded, Scopus) identifier

  • Nəşrin Növü: Article / Article
  • Cild: 47 Say: 3
  • Nəşr tarixi: 2011
  • Doi nömrəsi: 10.1134/s0020168511030022
  • jurnalın adı: Inorganic Materials
  • Jurnalın baxıldığı indekslər: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Səhifə sayı: pp.235-239
  • Açıq Arxiv Kolleksiyası: Məqalə
  • Adres: Bəli

Qısa məlumat

The Sn-Bi-Te system has been studied in the composition region SnTe-Bi 2Te 3-Te at temperatures from 300 to 430 K using emf measurements on reversible concentration cells of the type (-) SnTe s | liquid electrolyte, Sn 2+ | Sn - Bi - Te (s) (+). (-) SnTe(s) | liquid electrolyte, Sn 2+ | (Sn-Bi-Te)(s)(+). The subsolidus phase diagram inferred from the emf data includes the ternary compounds SnBi 2Te 4, SnBi 4Te 7, and SnBi 6Te 410 and a broad (0-25 mol % Sn Te) range of Bi 2Te 3-based solid solutions. Best fit equations for the temperature-dependent emf data were used to determine the differences between the partial thermodynamic functions (ΔG, ΔH, and ΔS) of the Sn in SnTe and SnTe-Bi 2Te 43-Te alloys. From these partial molar functions, we calculated the standard thermodynamic functions of formation and standard entropies of the β-solution and ternary compounds by integrating the Gibbs-Duhem equation along the SnTe-Bi 2Te 3 join with the use of the relevant data for SnTe and Bi 2Te 3. © 2011 Pleiades Publishing, Ltd.