A Fe/Nb co-doped Sr(Co0.8Fe0.1Nb0.1)O 3 - δ perovskite oxide for air separation: Structural, sintering and oxygen permeating properties

Hui Lu, Sou Hwan Son, Jong Pyo Kim, Jung Hoon Park

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

The novel Fe/Nb co-doped Sr(Co0.8Fe0.1Nb 0.1)O3 - δ oxide was synthesized by the solid-state reaction method. Structural and sintering properties of the Sr(Co0.8Fe0.1Nb0.1)O3 - δ oxide/ceramic were studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The oxygen permeation flux of the Sr(Co 0.8Fe0.1Nb0.1)O3 - δ membrane was measured to be 1.80 ml min- 1 cm - 2 under an air/helium gradient at 950°C, and the membrane also shows good oxygen permeation stability. The results demonstrate that the structural stability of the Fe/Nb co-doped Sr(Co0.8Fe 0.1Nb0.1)O3 - δ oxide is improved significantly compared to those of the Sr(Co0.8Fe 0.2)O3 - δ and (Ba0.5Sr 0.5)(Co0.8Fe0.2)O3 - δ oxides. The incorporation of the Fe/Nb cations in the SrCoO3 - δ oxide result in the improved stability of Sr(Co0.8Fe0.1Nb0.1)O3 - δ.

Original languageEnglish
Pages (from-to)702-704
Number of pages3
JournalMaterials Letters
Volume65
Issue number4
DOIs
StatePublished - 28 Feb 2011

Keywords

  • Crystal structure
  • Membrane
  • Oxygen permeation
  • Perovskite
  • Sintering

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