Electrical conductivity of Nd1-x Ca x Sc 1-y Mg y O3 perovskite-type oxides

Hisashi Kato, Hiroo Yugami

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The electrical conductivities of Nd1-x Ca x Sc 1-y Mg y O3 were measured in the temperature range from 673 to 1273 K under both wet and dry conditions. The optimum Ca 2+ doping concentration to the Nd3+ site in NdScO 3 was found to be the range from 5 to 10%. Hole conduction was predominant under dry and highly oxidized conditions of P(O2) ∈>∈10-2 kPa in the temperature range from 973 to 1273 K, and proton conduction was predominant under wet and reduced conditions in the temperature range from 673 to 973 K. Oxide ion conduction was predominant under wet and reduced conditions in the temperature range from 1073 to 1273 K. The Mg2+ doping concentration limit for the Sc3+ site to hold a single crystal phase was 2%, and this doping enhanced hole conduction.

Original languageEnglish
Pages (from-to)219-224
Number of pages6
JournalJournal of Electroceramics
Volume18
Issue number3-4
DOIs
Publication statusPublished - 2007 Aug 1

Keywords

  • Electrical conductivity
  • Perovskite
  • Proton conduction
  • Scandium oxide

ASJC Scopus subject areas

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

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