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New insight into atmospheric alteration of alkali-lime silicate glasses

Abstract : A mixed alkali lime silicate glass altered in atmospheric conditions (80 °C/85%RH, Relative Humidity) for various lengths of time was characterized at all scales. The altered glass forms a hydrated solid phase bearing about 10 wt% of H 2 O in the form of Si-OH groups and molecular water. No alkali depletion was observed after ageing tests. Structural results from 1 H, 23 Na and 29 Si MAS NMR point out the close proximity of Si-OH, H 2 O and Na + species. This study gives new insight into the mechanisms of the atmospheric alteration, essential to conservation strategies in industry and cultural heritage.
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Submitted on : Wednesday, April 19, 2017 - 12:19:54 PM
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Fanny Alloteau, Patrice Lehuédé, Odile Majérus, Isabelle Biron, Anaïs Dervanian, et al.. New insight into atmospheric alteration of alkali-lime silicate glasses. Corrosion Science, Elsevier, 2017, 122, pp.12-25. ⟨10.1016/j.corsci.2017.03.025⟩. ⟨cea-01510271⟩



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