Defect structure analysis of B-site doped perovskite-type proton conducting oxide BaCeO3 Part 1: The defect concentration of BaCe0.9M0.1O3-δ (M = Y and Yb)

Masatsugu Oishi, Satoshi Akoshima, Keiji Yashiro, Kazuhisa Sato, Junichiro Mizusaki, Tatsuya Kawada

研究成果: Article査読

45 被引用数 (Scopus)

抄録

By means of a high-temperature gravimetry, the defect chemical relationships between oxygen nonstoichiometry and water content in BaCe0.9M0.1O3-δ (M = Y and Yb) were investigated as functions of partial pressure of oxygen, P(O2), partial pressure of water vapor, P(H2O), and temperature. Concentrations of protonic defect and that of oxygen vacancy strongly depend on P(H2O) and temperature, while the dependences on P(O2) were weak. The equilibrium constants of the water vapor incorporation reaction H2O + VO••• + OO× = 2OHO were determined. Concentrations of hole, [h], in the dry-atmospheres were determined by the weight gain by the incorporation of oxygen from the gas atmospheres. The [h] values increased with decreasing temperature. The [h] values were estimated to be about 2 to 3 orders of magnitude less than [OHO] values measured in the wet-atmospheres.

本文言語English
ページ(範囲)127-131
ページ数5
ジャーナルSolid State Ionics
180
2-3
DOI
出版ステータスPublished - 2009 3 9

ASJC Scopus subject areas

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

フィンガープリント 「Defect structure analysis of B-site doped perovskite-type proton conducting oxide BaCeO<sub>3</sub> Part 1: The defect concentration of BaCe<sub>0.9</sub>M<sub>0.1</sub>O<sub>3-δ</sub> (M = Y and Yb)」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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