Novel oxygen sensor based on a metal-metal oxide scale system

Ken Ich Kawamura, Atsushi Kaimai, Yutaka Nigara, Tatsuya Kawada, Junichiro Mizusaki

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A novel oxygen sensor was proposed. The sensor, an electrochemical cell, was composed of a metal as reference electrode, its oxide scale as electrolyte and Pt or other adequate materials as sample electrode. It is expected that the electrolyte is self-restorative because it can be restored by high temperature oxidation. The emf measurements were carried out at 873 K in cells using zirconium. At PO(2) = 1 to approximately 10-3 atm, the emf vs. log PO(2) plot lies on a straight line and its gradient is 2.303RT/4F, suggesting tion = 1 at the surface of the scale. The emf steeply decreases with decreasing PO(2) at PO(2)<10-3 atm which can not be explained by the increase in the electronic conductivity and is explained by a gas laminar film phase at the surface of the sample electrode.

Original languageEnglish
Pages (from-to)151-156
Number of pages6
JournalJournal of Electroceramics
Volume2
Issue number3
DOIs
Publication statusPublished - 1998

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering
  • Materials Chemistry

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