Journal
RARE METALS
Volume 28, Issue 2, Pages 202-208Publisher
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-009-0040-4
Keywords
perovskite-type oxide; total conductivity; oxygen permeability; stability
Funding
- National High-Tech Research and Development Program of China [2006AA11A189]
- Science and Technology Commission of Shanghai Municipality [07DZ12036]
- National Engineering Research Center of Advanced Steel Technology [050209]
- Education Commission of Shanghai Municipality
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The total conductivity, oxygen sorption property, oxygen permeability and stability of pure perovskite-type oxide BaCo0.7Fe0.2Nb0.1O3-delta (BCFNO) in real operating conditions were investigated. Its total conductivity was measured to be 3.6 S center dot cm(-1) at 600A degrees C. Though the total conductivity of the BCFNO membrane is much smaller than that of the Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCFO) membrane, the oxygen permeability of the BCFNO membrane is similar to that of the BSCFO membrane. SEM observation and EDX analysis of the BCFNO and BSCFO membranes indicated that no segregation of metal ions was found for the used BCFNO membrane while the original perovskite phase of BSCFO decomposed under the experimental condition. The experimental results of oxygen permeability and stability were consistent with the analysis on the oxygen sorption property of perovskites.
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