New insight into atmospheric alteration of alkali-lime silicate glasses

Fanny Alloteau (1) , Patrice Lehuédé (1) , Odile Majérus (1) , Isabelle Biron (1) , Anaïs Dervanian (1) , Thibault Charpentier (2) , Daniel Caurant (1)

1 IRCP - Institut de Recherche de Chimie Paris
2 LSDRM - Laboratoire Structure et Dynamique par Résonance Magnétique (LCF)

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.

Domains: Chemical Sciences; Material chemistry

Fanny Alloteau, Patrice Lehuédé, Odile Majérus, Isabelle Biron, Anaïs Dervanian, et al.. New insight into atmospheric alteration of alkali-lime silicate glasses. Corrosion Science, 2017, 122, pp.12-25. ⟨10.1016/j.corsci.2017.03.025⟩. ⟨cea-01510271⟩