Solid-phase equilibria in the GeBi2Te4-Bi2Te3-Te system and thermodynamic properties of compounds of the GeTe·mBi2Te3 homologous series

Alakbarova, T.M.; Orujlu, E.N.; Бабанлы, Д. М.; Imamaliyeva, S. Z.; Бабанлы, М. Б.

doi:10.15330/pcss.23.1.25-33

Cited by 2 publications

(2 citation statements)

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“…The values of thermodynamic functions of the reactions (R1)-(R6) at 298 K and p=10 5 Pa were calculated using Eqs. ( 7)- (9). The determined results are listed in Table 2.…”

Section: * Data Point Not Included In Treatmentmentioning

confidence: 99%

“…The purpose of this work was to establish the values of standard thermodynamic functions (Gibbs energy, enthalpy, and entropy) of the AgInSe 2 , AgIn 5 Se 8 , AgIn11Se17, and In6Se7 compounds by using the EMF method [7][8][9] and literature data on the thermodynamic properties of the InSe and In2Se3 compounds [10]. The results of calculations of thermodynamic functions of compounds can be used to analyze the reasons for changes in the performance of equipment manufactured with their participation and modeling the phase diagrams of multicomponent systems, including Ag-In-Se, by the CALPHAD methods [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic properties of selected compounds of the Ag–In–Se system determined by the electromotive force method

Moroz

Demchenko

Tesfaye

et al. 2022

Phys. Chem. Solid St.

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The equilibrium phase space of the Ag–In–Se system in the part AgInSe2–InSe–Se below 500 K consists seven three-phase regions In2Se3–AgIn11Se17–Se (I), AgIn11Se17–AgIn5Se8–Se (II), AgIn5Se8–AgInSe2–Se (IІІ), In2Se3–In6Se7–AgIn11Se17 (ІV), In6Se7–AgIn11Se17–AgIn5Se8 (V), InSe–In6Se7–AgIn5Se8, and InSe–AgIn5Se8–AgInSe2 (VI). Division of the AgInSe2–InSe–Se into separate phase regions was performed based on electromotive force vs temperature dependences of six electrochemical cells (ECCs) of the type: (−) С | Ag | SЕ | R(Ag+) | PЕ | С (+), where C is the graphite (inert electrode), Ag is the left (negative) electrode, SE is the solid-state electrolyte (Ag3GeS3Br glass), PE is the right (positive) electrode, R(Ag+) is the buffer region of PE that contacts with SE. The process of forming of the thermodynamically stable set of phases from phase non-equilibrium mixture of compounds specified in (I)–(VI) is carried out in the R(Ag+) region. The Ag+ ions act as the small nucleation centers for stable phases. Based on the temperature dependences of the electromotive force of ECCs with PE of the (I)–(VI) phase regions, the standard thermodynamic functions of the binary In6Se7 and three ternary compounds in the adjacent phase regions were calculated for the first time. The agreement of the calculated values of the standard Gibbs energies of the AgIn5Se8 compound in two different phase regions (II) and (V): -(819,6±8,9) kJ·mol −1 and -(820,0±8,9) kJ·mol −1 characterizes the phase composition of the regions (I), (II), (IV), and (V) below 500 K as a combination of compounds of formulaic composition.

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“…The values of thermodynamic functions of the reactions (R1)-(R6) at 298 K and p=10 5 Pa were calculated using Eqs. ( 7)- (9). The determined results are listed in Table 2.…”

Section: * Data Point Not Included In Treatmentmentioning

confidence: 99%