Improved oxygen ion conductivity of NdAlO3 perovskite-type oxide by doping with Ga

Tatsumi Ishihara, Hideaki Matsuda, Yukako Mizuhara, Yusaku Takita

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34 Citations (Scopus)

Abstract

Effects of Ga addition to NdAlO3 on the oxygen ion conductivity were studied. Substitution of Ga to Al sites is effective for enhancing the oxygen ion conductivity of Nd0.9Ca0.1AlO3 and the highest oxygen ion conduction was obtained at x=0.5 in Nd0.9Ca0.1Al1-xGaxO3. Since the increased oxygen ion conduction by doping Ga suppressed the p-type semic onduction at high oxygen partial pressure, electrical conductivity was almost independent of the oxygen partial pressure in a range from PO2=1 to 10-20 atm. The oxygen ion conductivity of Nd0.9Ca0.1Al0.1Ga0.5O3 at 1223 K is as high as log (σ/S cm-)=-1.4, and furthermore, the oxide ion transference number is estimated to be almost 1.0 over a wide range of oxygen partial pressure and temperature.

Original languageEnglish
Pages (from-to)234-238
Number of pages5
JournalSolid State Ionics
Volume70-71
Issue numberPART 1
DOIs
Publication statusPublished - Jan 1 1994
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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