| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9567513 | Applied Surface Science | 2005 | 7 Pages |
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. Fluorine in the abrasives corresponded to a lower average cerium valence. Time series investigations indicate that fluorine substitutes on the oxygen sub-lattice and is charge-balanced by some cerium changing from Ce4+ to Ce3+.
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Authors
Shelley R. Gilliss, James Bentley, C. Barry Carter,