Activity measurement of liquid Te-In alloys by an EMF method using a zirconia electrolyte

Kazuo Kameda, Katsunori Yamaguchi

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Abstract

The activity of the liquid Te-In system has been determined by the emf measurement of the following galvanic cell: ⊕Pt/Ni(s), NiO(s) |ZrO2(+CaO) |Te-In(1), In2O3(s) /Re/Pt$DMIN (for NIn=0.18-0.90 at 923-1116 K). The activity of indium in liquid Te-In alloys at 1000 K and 1050 K shows large negative deviations from Raoult's law in the tellurium-rich region and remarkable negative to positive deviations from ideality in the indium-rich region. The activity of tellurium at the same temperatures exhibits negative deviations from Raoult's law over the whole concentration range. The α functions of indium in the alloys show curves against NIn, suggesting the absence of the behavior of a regular solution. The free energy of mixing at 1050 K has large negative values compared with ΔGid, and the peak value of ΔG shows -27.0 kJ/mol at about NIn=0.55. Heat of mixing shows very large negative values. The peak value of ΔH is -20.6 kJ/mol at about NIn=0.49.

Original languageEnglish
Pages (from-to)1222-1227
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume54
Issue number11
Publication statusPublished - 1990 Nov
Externally publishedYes

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Indium
zirconium oxides
Tellurium
Zirconia
Raoult law
Electrolytes
indium
electrolytes
tellurium
deviation
Liquids
Electric potential
liquids
electrolytic cells
Free energy
free energy
heat
curves
zirconium oxide
Temperature

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

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title = "Activity measurement of liquid Te-In alloys by an EMF method using a zirconia electrolyte",
abstract = "The activity of the liquid Te-In system has been determined by the emf measurement of the following galvanic cell: ⊕Pt/Ni(s), NiO(s) |ZrO2(+CaO) |Te-In(1), In2O3(s) /Re/Pt$DMIN (for NIn=0.18-0.90 at 923-1116 K). The activity of indium in liquid Te-In alloys at 1000 K and 1050 K shows large negative deviations from Raoult's law in the tellurium-rich region and remarkable negative to positive deviations from ideality in the indium-rich region. The activity of tellurium at the same temperatures exhibits negative deviations from Raoult's law over the whole concentration range. The α functions of indium in the alloys show curves against NIn, suggesting the absence of the behavior of a regular solution. The free energy of mixing at 1050 K has large negative values compared with ΔGid, and the peak value of ΔG shows -27.0 kJ/mol at about NIn=0.55. Heat of mixing shows very large negative values. The peak value of ΔH is -20.6 kJ/mol at about NIn=0.49.",
author = "Kazuo Kameda and Katsunori Yamaguchi",
year = "1990",
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TY - JOUR

T1 - Activity measurement of liquid Te-In alloys by an EMF method using a zirconia electrolyte

AU - Kameda, Kazuo

AU - Yamaguchi, Katsunori

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N2 - The activity of the liquid Te-In system has been determined by the emf measurement of the following galvanic cell: ⊕Pt/Ni(s), NiO(s) |ZrO2(+CaO) |Te-In(1), In2O3(s) /Re/Pt$DMIN (for NIn=0.18-0.90 at 923-1116 K). The activity of indium in liquid Te-In alloys at 1000 K and 1050 K shows large negative deviations from Raoult's law in the tellurium-rich region and remarkable negative to positive deviations from ideality in the indium-rich region. The activity of tellurium at the same temperatures exhibits negative deviations from Raoult's law over the whole concentration range. The α functions of indium in the alloys show curves against NIn, suggesting the absence of the behavior of a regular solution. The free energy of mixing at 1050 K has large negative values compared with ΔGid, and the peak value of ΔG shows -27.0 kJ/mol at about NIn=0.55. Heat of mixing shows very large negative values. The peak value of ΔH is -20.6 kJ/mol at about NIn=0.49.

AB - The activity of the liquid Te-In system has been determined by the emf measurement of the following galvanic cell: ⊕Pt/Ni(s), NiO(s) |ZrO2(+CaO) |Te-In(1), In2O3(s) /Re/Pt$DMIN (for NIn=0.18-0.90 at 923-1116 K). The activity of indium in liquid Te-In alloys at 1000 K and 1050 K shows large negative deviations from Raoult's law in the tellurium-rich region and remarkable negative to positive deviations from ideality in the indium-rich region. The activity of tellurium at the same temperatures exhibits negative deviations from Raoult's law over the whole concentration range. The α functions of indium in the alloys show curves against NIn, suggesting the absence of the behavior of a regular solution. The free energy of mixing at 1050 K has large negative values compared with ΔGid, and the peak value of ΔG shows -27.0 kJ/mol at about NIn=0.55. Heat of mixing shows very large negative values. The peak value of ΔH is -20.6 kJ/mol at about NIn=0.49.

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