Structure and oxygen permeability of a dual-phase membrane

Haihui Wang, Wei Shen Yang, You Cong, Xuefeng Zhu, Y. S. Lin

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

The dual-phase membrane of La0.15Sr0.85Ga 0.3Fe0.7O3-δ-Ba0.5Sr 0.5Fe0.2Co0.8O3-δ (LSGF-BSCF) was prepared successfully. This membrane was characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron probe micro-analyzer (EPMA). This membrane has a dense dual-phase structure: LSGF being the dense body of this membrane and BSCF as another phase running along the LSGF body. This structure is favorable for the oxygen permeation through the membrane. The oxygen permeation test shows that the oxygen permeation flux of LSGF-BSCF membrane (JO2=0.45ml/mincm2, at 915°C) is much higher than that of LSGF membrane (JO2=0.05ml/mincm 2). Thickness dependence of oxygen permeation indicates that the oxygen permeation is controlled by the bulk diffusion. Compared to pure BSCF, the dual-phase membrane of LSGF-BSCF is stable in reducing atmosphere.

Original languageEnglish (US)
Pages (from-to)107-115
Number of pages9
JournalJournal of Membrane Science
Volume224
Issue number1-2
DOIs
StatePublished - Oct 15 2003
Externally publishedYes

Keywords

  • Dual-phase
  • Inorganic membrane
  • Mixed-conductor
  • Oxygen separation
  • Perovskite

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

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