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Crystal Structures of Mixed-Conducting Oxides Present in The Sr-Fe-Co-O System

Published online by Cambridge University Press:  10 February 2011

J. P. Hodges ,
J. D. Jorgensen ,
D. J. Miller ,
B. Ma ,
U. Balachandran  and
J. W. Richardson JR
J. P. Hodges
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
J. D. Jorgensen
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
D. J. Miller
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
B. Ma
Affiliation:
Energy Technology Division, Argonne National Laboratory, Argonne, IL 60439
U. Balachandran
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
J. W. Richardson JR
Affiliation:
Intense Pulsed Neutron Source, Argonne National Laboratory, Argonne, IL 60439
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Abstract

The potential applications of mixed-conducting ceramic oxides include solid-oxide fuel cells, rechargeable batteries, gas sensors and oxygen-permeable membranes. Several perovskite-derived mixed Sr-Fe-Co oxides show not only high electrical-conductivity but also appreciable oxygen-permeability at elevated temperatures. For example, dense ceramic membranes of SrFeCo0.5O3-δ can be used to separate oxygen from air without the need for external electrical circuitry. The separated oxygen can be directly used for the partial oxidation of methane to produce syngas. Quantitative phase analysis of the SrFeCo0.5O3-δ material has revealed that it is predominantly composed of two Sr-Fe-Co-O systems, Sr4Fe6-xCoxO13 and SrFe1−xCoxO3-δ. Here we report preliminary structural findings on the SrFe1−xCoxO3-δ (0 ≤ x ≥ 0.3) system.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 496: Symposium Y – Materials For Electrochemical Energy Storage & Conversion II… , 1997 , 173
Copyright
Copyright © Materials Research Society 1998

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References

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