Preparation of Sr β-alumina ionic conductors and their a.c. Impedance measurements

He Gang, Yasukazu Hayasaka, Takayuki Narushima, Takashi Goto, Toshio Hirai, Yasutaka Iguchi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

β-alumina type ionic conductors were synthesized in the SrO-MgO-Al2O3 system by a direct sintering method and their electrical conductivity was measured at 873 to 1373 K by an a.c. impedance method in order to apply the β-alumina to solid electrolyte of a gas sensor at high temperatures. Sr β-aluminas in a single phase were obtained in the composition range of SrO : MgO : Al2O3=1 : 1 : 4.8-5.2. The bulk and grain boundary conductivities were separated from the total conductivity at SrO : MgO : Al2O3=1 : 1 : 4.8 and 1 : 1 : 5.0. The bulk conductivity of the Sr β-alumina was around 6.7 × 10-3 S·m-1 at 1373 K.

Original languageEnglish
Pages (from-to)1067-1071
Number of pages5
JournalJournal of the Ceramic Society of Japan
Volume105
Issue number12
Publication statusPublished - 1997 Dec

Keywords

  • Aluminate
  • Complex impedance
  • Electrical property
  • Ionic conductor
  • Strontium
  • β-alumina

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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