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

Kazuo Kameda, Katsunori Yamaguchi

Research output: Contribution to journalArticle

3 Citations (Scopus)

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
DOIs
Publication statusPublished - 1990 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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