Abstract
The complicated structural speciation in boroaluminosilicate glasses leads to a mixed network former effect yielding nonlinear variation in many macroscopic properties as a function of chemical composition. Here we study the composition-structure-property relationships in a series of sodium boroaluminosilicate glasses from peralkaline to peraluminous compositions by substituting Al 2O 3 for SiO 2. Our results reveal a pronounced change in all the measured physical properties (density, elastic moduli, hardness, glass transition temperature, and liquid fragility) around [Al 2O 3]-[Na 2O] = 0. The structural origin of this change is elucidated through nuclear magnetic resonance analyses and topological considerations. Furthermore, we find that addition of 1 mol% Fe 2O 3 exerts a complicated impact on the measured properties.
Original language | English (US) |
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Pages (from-to) | 993-1002 |
Number of pages | 10 |
Journal | Journal of Non-Crystalline Solids |
Volume | 358 |
Issue number | 6-7 |
DOIs | |
State | Published - Apr 1 2012 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry