Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 352, Issue 50-51, Pages 5446-5451Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2006.08.041
Keywords
chemical durability; ion exchange; diffusion and transport; archaeology; alkali silicates; hydration
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In this study, ion-microprobe analyses of four samples of buried medieval stained-glasses are used to demonstrate that water penetrates into the matrix of pristine glasses at low temperatures, thereby showing that glass alteration is not only a surface process. The diffusion coefficients of water determined from concentration profiles of hydrogen are found to be correlated with the bulk polymerization state of the glass. This observation is discussed with respect to glass structure and implies that ionic exchange between hydrogen and network modifying metal cations is the major process responsible for glass hydration. (c) 2006 Elsevier B.V. All rights reserved.
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