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Copper-associated aluminum ionized center [AlO4−/Cu++]+ in a γ-irradiated copper (I)-containing silica glass

Published online by Cambridge University Press:  31 January 2011

Radhaballabh Debnath
Radhaballabh Debnath
Affiliation:
Central Glass and Ceramic Research Institute, 196 Raja S.C. Mullick Road, Calcutta-700 032, India
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Abstract

A new type of aluminum ionized center associated with the copper ion [AlO4−/Cu++]+ has been observed in a copper(I)-containing silica glass upon γ-irradiation at room temperature. The center, unlike many other previously reported monovalent cation-compensated aluminum ionized hole centers [AlO4/M+]+, where M+ = H+, Li+, Na+, Ag+, etc., behaves more like a simple ionized center rather than an ionized hole center. We argue that complete compensation of the hole on the aluminum ion of the center becomes possible because of the compensating copper ion. This is accomplished by the donation of an electron by the cuprous ion to the neighboring irradiationgenerated [AlO4]0 hole via that oxygen atom of the (AlO4), which is nearest to the cation.

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Articles
Information
Journal of Materials Research , Volume 15 , Issue 3 , March 2000 , pp. 824 - 831
Copyright
Copyright © Materials Research Society 2000

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