Application of Srβ-alumina solid electrolyte to a CO2 gas sensor

Takashi Goto, Gang He, Takayuki Narushima, Yasutaka Iguchi

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Srβ-alumina was synthesized in a SrO-MgO-Al2O3 system by solid state sintering, and the electrical conductivity was measured at 873-1673 K by impedance spectroscopy. The oxygen concentration cell method was applied to measure the ionic transport number. The ionic transport numbers were close to 1 in the temperature range between 1200 and 1600 K. Open- and closed-type CO2 gas sensors were constructed using the Srβ-alumina solid electrolyte and a Pt-SrCO3 auxiliary electrode. The CO2 sensors responded well to the changes of CO2 partial pressures at temperatures of 1073-1373 K.

Original languageEnglish
Pages (from-to)329-336
Number of pages8
JournalSolid State Ionics
Volume156
Issue number3-4
DOIs
Publication statusPublished - 2003 Jan 1

Keywords

  • A.c. impedance spectroscopy
  • CO gas sensor
  • Open-type cell
  • Strontium β-alumina
  • Transport number

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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