Thermal Stability and Thermodynamics of the Ag2ZnGeS4 Compound

Mykola Moroz, Fiseha Tesfaye, Pavlo Demchenko, Myroslava Prokhorenko, Daniel Lindberg, Oleksandr Reshetnyak*, Leena Hupa

*Korresponderande författare för detta arbete

    Forskningsoutput: Kapitel i bok/konferenshandlingKonferensbidragVetenskapligPeer review

    2 Citeringar (Scopus)
    7 Nedladdningar (Pure)

    Sammanfattning

    Phase equilibria in the ZnS–Ag2GeS3–Ge–GeS2 part of the Ag–Zn–Ge–S system were investigated using differential thermal analysis, X-ray diffraction, and EMF methods. The data was used to model Ag2GeS3–ZnS polythermal section. Further, the mechanism of formation and thermal stability of the Ag2ZnGeS4 compound were established. The results suggest the presence of another quaternary phase Ag4ZnGe2S7 in the temperature range of 695–853 K. The determined phase relations were used to express the chemical reactions. Based on the electromotive force versus temperature measurements, experimental thermodynamic data of the Ag2ZnGeS4 quaternary phase were derived for the first time. The calculated Gibbs energy , enthalpy and entropy values of the Ag2ZnGeS4 compound in both phase regions are consistent, which indicates that Ag2ZnGeS4 has stoichiometric composition.

    OriginalspråkEngelska
    Titel på gästpublikationMaterials Processing Fundamentals 2019
    RedaktörerGuillaume Lambotte, Jonghyun Lee, Antoine Allanore, Samuel Wagstaff
    FörlagSpringer, Cham
    Sidor215–226
    ISBN (elektroniskt)978-3-030-05728-2
    ISBN (tryckt)978-3-030-05727-5
    DOI
    StatusPublicerad - 2019
    MoE-publikationstypA4 Artikel i en konferenspublikation
    EvenemangMaterials Processing Fundamentals Symposium - Materials Processing Fundamentals Symposium
    Varaktighet: 1 jan 2019 → …

    Publikationsserier

    NamnThe Minerals, Metals & Materials Series
    FörlagSpringer International Publishing

    Konferens

    KonferensMaterials Processing Fundamentals Symposium
    Period01/01/19 → …

    Nyckelord

    • Chalcogenide semiconductors
    • EMF method
    • Gibbs' free energy
    • Phase equilibria
    • Thermodynamic properties

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