Determination of electronic conductivity limits of mullite and ZrO2-9 mol% MgO solid electrolytes

A. Nagatani, Ryo Inoue, H. Suito

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8 Citations (Scopus)

Abstract

A coulometric titration technique was used for the determination of the parameter Pθ{symbol}, defined as the oxygen partial pressure at which the ionic conductivity and n-type electronic conductivity of the electrolyte are equal, for mullite and 9 mol% MgO stabilized zirconia electrolytes in the temperature range 1674-1921 K. The results of Pθ{symbol} for mullite and ZrO2-9 mol% MgO were log(Pθ{symbol}/101 325 Pa)=54.32-137000/T and log (Pθ{symbol}/101 325 Pa)=27.16-75500/T, respectively. The results for low oxygen activities in liquid iron are discussed on the basis of the present results for Pθ{symbol} values.

Original languageEnglish
Pages (from-to)859-864
Number of pages6
JournalJournal of Applied Electrochemistry
Volume22
Issue number9
DOIs
Publication statusPublished - 1992 Sep 1

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry
  • Materials Chemistry

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