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Analysis of the Atomic Scale Defect Chemistry in Oxygen Deficient Materials by STEM

Published online by Cambridge University Press:  10 February 2011

Y. Ito ,
S. Stemmer ,
R. F. Klie ,
N. D. Browning ,
A. Sane  and
T. J. Mazanec
Y. Ito
Affiliation:
BP Chemicals Inc, 4440 Warrensville Center Road, Cleveland, OH 44128-2837.
S. Stemmer
Affiliation:
BP Chemicals Inc, 4440 Warrensville Center Road, Cleveland, OH 44128-2837.
R. F. Klie
Affiliation:
BP Chemicals Inc, 4440 Warrensville Center Road, Cleveland, OH 44128-2837.
N. D. Browning
Affiliation:
BP Chemicals Inc, 4440 Warrensville Center Road, Cleveland, OH 44128-2837.
A. Sane
Affiliation:
Department of Physics, University of Illinois, 845 W. Taylor St., Chicago, IL 60607-7059.
T. J. Mazanec
Affiliation:
Department of Physics, University of Illinois, 845 W. Taylor St., Chicago, IL 60607-7059.
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Abstract

The high mobility of anion vacancies in oxygen deficient perovskite type materials makes these ceramics potential candidates for oxygen separation membranes. As a preliminary investigation of the defect chemistry in these oxides, we show here the analysis of SrCoO3−σ using atomic resolution Z-contrast imaging and electron energy loss spectroscopy in the scanning transmission electron microscope. In particular, after being subjected to oxidation/reduction cycles at high temperatures we find the formation of ordered microdomains with the brownmillerite structure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 589 , 1999 , 69
Copyright
Copyright © Materials Research Society 2001

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References

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