Experimental thermodynamic study of intermetallic phases in the binary Ag–Te system by an improved EMF method

Tesfaye, Fiseha; Taskinen, Pekka; Aspiala, Markus; Feng, Dawei

doi:10.1016/j.intermet.2012.10.009

Cited by 24 publications

(8 citation statements)

References 21 publications

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“…(14)- (17) and the temperature dependence of the Gibbs energy for β-Ag 2 Te, = (-26.013 ± 1.858) -(42.8 ± 9) × 10 -3 T [6], and Eqs. (10)-(13) take the form (Δ f G, kJ/mol) …”

Section: Resultsmentioning

confidence: 99%

“…Intermediate Ag 2 Te, Ag 1.9 Te, and Ag 5 Te 3 phases are formed in the Ag-Te region of system I. The regions of the existence, polymorphic transitions, and thermodynamic properties of the structural modifications of the above phases were described in [5,6]. Intermediate variable-composition Bi 2 Te 3 , BiTe, Bi 2 Te, and Bi 14 Te 6 phases are formed in the quasi-ternary Ag 2 Te-Bi-Bi 2 Te 3 system.…”

Section: Introductionmentioning

confidence: 99%

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Measuring the thermodynamic properties of saturated solid solutions in the Ag2Te-Bi-Bi2Te3 system by the electromotive force method

Прохоренко

Moroz

Demchenko

2015

Russ. J. Phys. Chem.

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The temperature dependence of the electromotive force (EMF) of Ag|AgI|glass Ag 2 GeS 3 |D galvanic elements (where Ag, D are galvanic element electrodes, D is equilibrium three-phase alloys in the Ag 2 Te-Bi-Bi 2 Te 3 system, AgI|glass Ag 2 GeS 3 is a two-layer membrane with purely ionic (Ag+) conductivity) is studied in the range of 490-550 K. Analytical equations are obtained for the temperature dependences of the Gibbs energies of the formation of saturated solid solutions of the Bi 14 Te 6 , Bi 2 Te, BiTe, and Bi 2 Te phases from elements in the Ag 2 Te-Bi-Bi 2 Te 3 system. E(Т) analytical equations are used to calculate the standardstate thermodynamic functions of saturated solid solutions of the Bi 14 Te 6 , Bi 2 Te, BiTe, and Bi 2 Te 3 phases in the Ag 2 Te-Bi-Bi 2 Te 3 system.

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“…(14)- (17) and the temperature dependence of the Gibbs energy for β-Ag 2 Te, = (-26.013 ± 1.858) -(42.8 ± 9) × 10 -3 T [6], and Eqs. (10)-(13) take the form (Δ f G, kJ/mol) …”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Measuring the thermodynamic properties of saturated solid solutions in the Ag2Te-Bi-Bi2Te3 system by the electromotive force method

Прохоренко

Moroz

Demchenko

2015

Russ. J. Phys. Chem.

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“…Thermal-EMF and temperature gradients can be minimized by using similar lead material at both electrodes and by placing the cell within the constant heating zone of the experimental assembly, respectively [9]. Proper design of the galvanic cells and their flexibility in the furnace while measurements are conducted will also help to minimize temperature differences at both ends of the electrodes, as described in [12]. In this work, all these experimental requirements were fulfilled.…”

Section: Experimental Requirementsmentioning

confidence: 99%

“…In a similar way, the entropies, enthalpies and heat capacities of the studied virtual reactions were calculated using Eqs. (10)- (12).…”

Section: Thermodynamics Of Electrochemical Cellsmentioning

confidence: 99%

The Fast Silver Ion Conducting Solid-State Electrolytes for Deriving Thermodynamic Data

Tesfaye¹,

Moroz²,

Reshetnyak³

et al. 2020

Thermophysical Properties of Complex Materials

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The electromotive force (EMF) method was described and some characteristic examples from the past and recent literatures were reviewed. The important experimental procedures for a successful measurement of an EMF of different galvanic cells at a certain temperature and determination of the thermodynamic properties of chemical compounds from the obtained EMF values were described. A typical galvanic cell arrangement in a furnace was presented. The two most common types of AgI-based solid electrolytes, AgI and RbAg 4 I 5 , were discussed in detail. The ionic conduction mechanisms and the application of the solid electrolytes in the EMF cells were described. In this work, we have also conducted EMF measurements using the fast Ag + ion conducting solid-state electrolyte. The solid-state electrolyte Ag 3 GeS 3 I glass and the cathode material Ag 4 HgSe 2 I 2 were synthesized and electrochemical cell (À)graphite|Ag|Ag 3 GeS 3 I glass|Ag 4 HgSe 2 I 2 |graphite(+) was assembled to measure the activity of Ag in the quaternary phase. The extremely low values of activity of silver in Ag 4 HgSe 2 I 2 in the temperature range 412-482 K indicate that Ag 4 HgSe 2 I 2 has superionic property. The obtained results and the determined thermodynamic values are presented and discussed.

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“…Silver telluride (Ag 2 Te) is a significant semiconductor (A 2 I B IV group) with a hopeful thermoelectric properties, large magneto resistance and high electrical conductivity 17 18 that has a large wide application in nonlinear optical devices, ion selective electrode, electrochemical storage cells, infrared sensors, solar cell and biological sensors 19 20 21 22 23 . Recently, a lot of attention focused on new type nano-devices based on Ag 2 Te nanostructures which are very importance because of their behavior that are differed from corresponding polycrystalline bulk in mechanical, electrical and magnetic properties 24 25 26 .…”

mentioning

confidence: 99%

Hydrothermal preparation of silver telluride nanostructures and photo-catalytic investigation in degradation of toxic dyes

Gholamrezaei

Salavati‐Niasari

Ghanbari

2016

Sci Rep

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Different morphologies of Ag2Te nanostructures were synthesized using TeCl4 as a new precursor and hydrazine hydrate as reducing agent by a hydrothermal method. Various parameters that affect on morphology and purity of nanostructures were optimized. According to our experiments the best time and temperature for preparation of this nanostructure are 12 h and 120 °C. The photo-catalytic behaviour of nanostructures in presence of UV- visible light for degradation of methyl orange was investigated. Results show that the presence of UV light is necessary for an efficient degradation of dye in aqueous solution. On the other hand, as observations propose the Ag2Te reveal a strong photoluminescence peak at room temperature that could be attributed to high level transition in the semiconductor. Nanostructures were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) techniques and UV–visible scanning spectrometer (UV-Vis).

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Experimental thermodynamic study of intermetallic phases in the binary Ag–Te system by an improved EMF method

Cited by 24 publications

References 21 publications

Measuring the thermodynamic properties of saturated solid solutions in the Ag2Te-Bi-Bi2Te3 system by the electromotive force method

Measuring the thermodynamic properties of saturated solid solutions in the Ag2Te-Bi-Bi2Te3 system by the electromotive force method

The Fast Silver Ion Conducting Solid-State Electrolytes for Deriving Thermodynamic Data

Hydrothermal preparation of silver telluride nanostructures and photo-catalytic investigation in degradation of toxic dyes

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