Oxygen-permeable membranes based on partially B-site substituted BaFe 1-yMyO3-δ (M=Cu or Ni)

Tetsuya Kida, Atsunori Yamasaki, Ken Watanabe, Noboru Yamazoe, Kengo Shimanoe

研究成果: Contribution to journalArticle査読

43 被引用数 (Scopus)

抄録

We carried out the partial substitution of the B-site in BaFeO 3-δ perovskite with divalent cations to develop novel oxygen-permeable materials. We demonstrated that the partial substitution of Cu or Ni by more than 10% resulted in the stabilization of the cubic perovskite structure even at room temperature in a highly oxygen-permeable phase, as revealed by the X-ray diffraction (XRD) analysis. The Cu substitution was more effective for the stabilization, because the introduction of Cu in the lattice more effectively made the Goldschmidt tolerance factor (t) close to 1.0. Ni- and Cu-substituted BaFeO3-δ membranes showed higher oxygen permeabilities than their parent BaFeO3-δ membranes particularly at lower temperatures around 600700 °C owing to the stabilization of the cubic phase. Among the fabricated membranes, a BaFe 0.85Cu0.15O3-δ membrane (1.0 mm thickness) showed the highest oxygen permeation flux (1.8 cm3 min-1 cm-2 at 930 °C) under an air/He gradient. The results indicated that Cu-substituted BaFeO is promising as a material for Co-free membranes with high oxygen permeabilities.

本文言語英語
ページ(範囲)2426-2431
ページ数6
ジャーナルJournal of Solid State Chemistry
183
10
DOI
出版ステータス出版済み - 10 2010

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • 凝縮系物理学
  • 物理化学および理論化学
  • 無機化学
  • 材料化学

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