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Characterization of Hydrated Surface Layers on Nuclear Waste Glasses by Infrared Reflectance Spectroscopy

Published online by Cambridge University Press:  26 February 2011

Lauren A. Zellmer  and
William B. White
Lauren A. Zellmer
Affiliation:
Materials Research Laboratory and Department of Geosciences, The Pennsylvania State University, University Park, PA 16802
William B. White
Affiliation:
Materials Research Laboratory and Department of Geosciences, The Pennsylvania State University, University Park, PA 16802
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Abstract

The reaction between aqueous solutions and borosilicate glasses designed for commercial or defense waste immobilization produces a hydrated layer on the surface of the glass which can be characterized by infrared reflectance spectroscopy. Specular reflectance curves, obtained by Fourier transform infrared spectroscopy, can be deconvoluted by Kramers-Kronig analysis to obtain true absorption spectra. The pattern of Si-O stretching modes changes for alkali silicate glass, indicating changes in the network polymerization. The characteristic intense band of the borosilicate glasses simply changes intensity in a way that scales with degree of hydration. The progressive hydration of the glass surface also appears as a broad OH band which can be extracted from the reflectance curve by the deconvolution process.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 44: Symposium N – Scientific Basis for Nuclear Waste Management VIII , 1984 , 73
Copyright
Copyright © Materials Research Society 1985

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