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Hydration Mechanisms of Silicate Glasses: Discussion of the Respective Role of ion Exchange and Water Permeation

Published online by Cambridge University Press:  26 February 2011

J.-C. Dran ,
J.-C. Petit ,
L. Trotignon ,
A. Paccagnella  and
G. Delia Mea
J.-C. Dran
Affiliation:
CSNSM/CNRS, BP1, 91406 Orsay, France
J.-C. Petit
Affiliation:
SESD/CEN-FAR, BP 6, 92265 Fontenay-aux-roses, France
L. Trotignon
Affiliation:
SESD/CEN-FAR, BP 6, 92265 Fontenay-aux-roses, France
A. Paccagnella
Affiliation:
Dipartimento di Ingegneria, Università di Trento, 38050 Mesiano, Italy
G. Delia Mea
Affiliation:
Dipartimento di Ingegneria, Università di Trento, 38050 Mesiano, Italy Unità CISM-GNSM di Padova, 35131 Padova, Italy
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Abstract

The comparative leaching behavior of a soda-lime glass and of a simulated nuclear glass has been investigated through H and Na depth profiles obtained with resonant nuclear reaction analysis. It is shown that glass surface hydration involves both H+/Na+ ion exchange and permeation of molecular water, the first process being dominant at low temperature and solution ionic strength and the second for high values of these two parameters. The shape of the H profile as well as the response of H retention to thermal treatment indicate that on the nuclear glass, most of the molecular water is more weakly bonded than on the soda-lime glass.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 127: Symposium BERLIN – Scientific Basis for Nuclear Waste Management XII , 1988 , 25
Copyright
Copyright © Materials Research Society 1989

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