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- Title
Hydronium Ions in Soda-lime Silicate Glass Surfaces.
- Authors
Bradley, Laura C.; Dilworth, Zachary R.; Barnette, Anna L.; Hsiao, Erik; Barthel, Anthony J.; Pantano, Carlo G.; Kim, Seong H.; Mauro, J.
- Abstract
The presence of leachable alkali ions, or their hydrated sites in the glass, is believed to be a determining factor for the interfacial water structure at the glass surface, influencing the surface properties of glass. The interfacial water structure on soda-lime silicate glass in humid ambience at room temperature was analyzed with sum-frequency-generation ( SFG) vibration spectroscopy, which can probe the interfacial water layer without spectral interferences from the gas phase water. The soda-lime glass surface exposed to water vapor shows three sharp SFG peaks at 3200, 3430, and 3670 cm−1 in SFG, which is drastically different from the SFG spectra of the water layers on the fused quartz glass surface and the liquid water/air interface. The sharp peak at 3200 cm−1 is believed to be associated with the hydronium ions in the Na+-leached silicate glass surface. The 3200 cm−1 peak intensity varies with the relative humidity, indicating its equilibrium with the gas phase water. It is proposed that the hydronium ions in the Na+-leached sites produce compressive stress in the silicate glass surface; thus the growth of hydronium ions with increasing humidity might be responsible for the increased wear resistance of soda-lime glass surfaces in near-saturation humidity conditions.
- Subjects
ALKALI metal ions; OXONIUM ions; HUMIDITY; QUARTZ; ELECTRONS
- Publication
Journal of the American Ceramic Society, 2013, Vol 96, Issue 2, p458
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/jace.12136