Improving the ionic conductivity of yttria-stabilised zirconia electrolyte materials

Toshiyuki Mori, John Drennan, Jong Heun Lee, Ji Guaang Li, Takayasu Ikegami

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Low-temperature anneals (1200 °C for 40 h) of 8 mol% yttria-stabilised zirconia, prior to the samples being sintered at 1500 °C, had the effect of improving the ionic conductivity of the specimens. The presence of SiO2 in the specimens was shown to be detrimental, however. Irrespective of the SiO2 content, this type of heat treatment also leads to improvements in conductivity. Extensive microstructural analysis provided indication of the mechanism of this phenomenon. This included selective formation of zircon, relief of sintering strain leading to the formation of coherent grain boundaries and segregation effects.

Original languageEnglish
Pages (from-to)529-533
Number of pages5
JournalSolid State Ionics
Volume154-155
DOIs
Publication statusPublished - 2002 Dec 2
Externally publishedYes

Keywords

  • Diffuse scatter
  • Grain boundaries
  • Ionic conductivity
  • Yttria-stabilised zirconia

ASJC Scopus subject areas

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

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