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Complex Defects in Lanthanide ion-Exchanged Beta Aluminas

Published online by Cambridge University Press:  21 February 2011

Pedro Valergai ,
Xianglin Jin ,
Frank Vozzo  and
Walter L. Roth
Pedro Valergai
Affiliation:
State University of New York at Albany, Physics Department, 1400 Washington Avenue, Albany, NY 12222
Xianglin Jin
Affiliation:
State University of New York at Albany, Physics Department, 1400 Washington Avenue, Albany, NY 12222
Frank Vozzo
Affiliation:
State University of New York at Albany, Physics Department, 1400 Washington Avenue, Albany, NY 12222
Walter L. Roth
Affiliation:
State University of New York at Albany, Physics Department, 1400 Washington Avenue, Albany, NY 12222
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Abstract

Na+ beta alumina crystals, ion-exchanged with Eu2+ and Nd3+, were studied using x-ray diffraction and optical spectroscopy. In partially-exchanged crystals, we found different concentrations of sodium and lanthanide ions in the two conduction planes of the unit cell. The results suggest that pairs of sodium ions are rapidly replaced by lanthanide ions in regions of the planes bridged by VAl-Ali-O-Ali-VAl extended defects.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 135: Symposium M – Solid State Ionics I , 1988 , 529
Copyright
Copyright © Materials Research Society 1989

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