Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5441077 | Journal of Non-Crystalline Solids | 2017 | 8 Pages |
Abstract
The energetics of structural mechanisms involving inter-conversions among oxygen species dictate structure and properties of oxide glasses. We explored the change in boron coordination as a function of fictive temperature in glasses containing Zr and/or Na. There was lower boron coordination in the Zr-containing glass, and there was less decrease in boron coordination with temperature. We relate this difference to changes in the energetics of Zr-O-Si and Na-O-Si linkages. Furthermore, we varied fictive temperature to explore the distribution of non-bridging oxygens (NBO) on Al and Si in a Ca aluminosilicate and a Y aluminosilicate. As temperature increased, Al-NBO% increased. We attribute this change with temperature to differences in the energetics of Si-NBO and Al-NBO, which result in a strong preference for Si-NBO that is predicted to persist over a wide temperature range.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Elizabeth I. Morin, Jonathan F. Stebbins,