Electrical conduction properties of rare earth orthophosphates under reducing conditions

Naoto Kitamura, Koji Amezawa, Yoshiharu Uchimoto, Yoichi Tomii, Teiichi Hanada, Naoichi Yamamoto

研究成果: Article査読

10 被引用数 (Scopus)

抄録

Electrical conduction properties of Sr-doped PrPO4, NdPO4 and SmPO4 with the monazite structure were investigated at 500-925 °C under H2/H2O reducing conditions. From H/D isotope effects and p(H2)-dependencies of the conductivities, it was found that the materials dominantly conducted protons under the wet reducing conditions although the materials slightly showed n-type electronic conduction at higher temperatures. Based on p(H2O) and p(H2)-dependencies of the conductivities, defect structures of the materials under the reducing conditions were discussed. As a result, it was considered that major positive defects were oxygen deficits at higher temperatures and protons at lower temperatures.

本文言語English
ページ(範囲)2369-2373
ページ数5
ジャーナルSolid State Ionics
177
26-32 SPEC. ISS.
DOI
出版ステータスPublished - 2006 10 31
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学

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