Ceramic microstructure and oxygen permeability of SrCo(Fe, M)O{sub 3{minus}{delta}} (M = Cu or Cr) perovskite membranes
- Belarus State Univ., Minsk (Belarus). Inst. of Physicochemical Problems
Stabilization of the cubic perovskite phase was demonstrated in the SrCo{sub 0.90{minus}x}Fe{sub 0.10}Cr{sub x}O{sub 3{minus}{delta}} oxide system at x {ge} 0.03. Oxygen permeability of SrCo(Fe, Cr)O{sub 3{minus}{delta}} solid solutions was independent of chromium content at x = 0.01--0.05. It was found that reducing ceramic grain size dimensions resulted in decreasing thermal expansion, electrical conductivity, and oxygen permeability of SrCo(Fe, Cu)O{sub 3{minus}{delta}} ceramic membranes. Oxygen transport through SrCo(Fe, M)O{sub 3{minus}{delta}} ceramics was shown to be limited by both the bulk ionic conductivity and oxygen exchange currents. The limiting effect of the membrane permeate-side surface on the permeation was higher in comparison with that on the feed-side surface.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 624308
- Journal Information:
- Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 4 Vol. 145; ISSN 0013-4651; ISSN JESOAN
- Country of Publication:
- United States
- Language:
- English
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