Fe/Mn-based perovskite-type oxides with excellent oxygen permeability and reduction tolerance

Yasutake Teraoka, Hironobu Shimokawa, Hajime Kusaba, Kazunari Sasaki

研究成果: Contribution to journalConference article査読

4 被引用数 (Scopus)

抄録

A family of Co-free, Fe/Mn-based perovskite-type oxides, (Sr, A′)(Fe, Mn)O3-δ (A′=La, Ba, Ca), was synthesized, and their oxygen permeability and phase stability in reducing atmosphere were investigated. The substitution of Mn at B site caused the decrease in oxygen permeability. As for the effect of A-site substitution, prominent promotion was observed by the substitution of Ba for 30% of Sr, and Ba0.3Sr 0.7FeO3-δ was found to be one of most excellent oxygen permeable materials with the permeation flux of 3.0 cm3(STP) cm-2 min-1 at 900°C. Reduction tolerance was evaluated by TG measurements in a 5%H2/N2 stream up to 1000°C. After the TG measurements, crystal structures of La-Sr-Co-Fe-O and Sr-Fe-(Mn)-O perovskites were decomposed or transformed into low oxygen permeable phases, but the perovskite-type structure of Ba-Sr-Fe-(Mn)-O survived. The Fe/Mn-based perovskites with high oxygen permeability and exceeding reduction tolerance could be used as stable membrane materials for membrane reactors catalyzing NO-CH4 reaction and the partial oxidation of CR4 into synthesis gas.

本文言語英語
論文番号K2.6
ページ(範囲)77-83
ページ数7
ジャーナルMaterials Research Society Symposium Proceedings
835
出版ステータス出版済み - 2005
イベントSolid State Ionics - 2004 - Boston, MA, 米国
継続期間: 11 29 200412 2 2004

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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