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Nanochemistry of Ceria Abrasive Particles

Published online by Cambridge University Press:  21 March 2011

Shelley R. Gilliss
Affiliation:
Carter Dept. of Chemical Engineering and Materials Science, University of Minnesota 421 Washington Ave. S.E., Minneapolis MN 55455, USA
James Bentley
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN
C. Barry
Affiliation:
Carter Dept. of Chemical Engineering and Materials Science, University of Minnesota 421 Washington Ave. S.E., Minneapolis MN 55455, USA
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Abstract

Surfaces of ceria (CeO2) particles have been studied by electron energy-loss spectroscopy in a field-emission gun scanning transmission electron microscope. All the ceria particles analyzed contained Ce3+ at the surface. Rare-earth impurities such as La were enriched at the surface and were observed for particles ranging from tens to hundreds of nanometers in size. The oxidation state of the cerium ion is measured from the Ce M5/M4white-line intensity ratio.

Type
Research Article
Copyright
Copyright © Materials Research Society 2004

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