Effects of changing temperature and composition on multi-component oxide glass structure
Abstract/Contents
- Abstract
- This work explores how varying temperature influences oxide glass structure across compositions. For the most part, aluminoborosilicates were studied, with occasional use of simpler model systems, because glasses containing Al, B and Si are found in diverse industrial applications. When optimizing a composition, the B/Si ratio and the identity of the alkali, alkaline earth or rare earth cations in the glass are often varied. Our goal was to understand how and why structure changed as a function of composition. But, to explore how glass structure changed as a function of composition, we needed to correct for differences in temperature among glasses; furthermore, to understand why glass structure changed with temperature and composition, it was helpful to quantify changes in structure as a function of changes in temperature. By exploring how structure changes with temperature, and then correcting for these effects, we compared the structure of various compositions at a single temperature. The energetics of hypothetical reactions can also be calculated from measured species proportions at various temperatures. These reactions provide insight into how glass structure changes with temperature and composition. In Chapter 2, the variation of cation charge and size, and B/Si on aluminoborosilicate glass structure were quantified through isothermal comparisons. Chapter 3 established that the direction of changes with Al coordination with temperature depended on B/Si ratio, and provided a mechanism to rationalize this observation. Chapter 4 explored the energetics of two types of oxygen speciation reactions in distinct aluminosilicate and aluminoborosilicate compositions. This work advances understanding of structural changes with temperature in diverse families of glass. The energetics of various structural reactions dictate the types and abundances of structural species as a function of temperature and composition and determines the overall structure (and properties). By advancing fundamental understanding of glass structure, we hope to facilitate design of industrial glasses with improved properties.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2017 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Morin, Elizabeth |
|---|---|
| Associated with | Stanford University, Department of Chemistry. |
| Primary advisor | Stebbins, Jonathan Farwell |
| Thesis advisor | Stebbins, Jonathan Farwell |
| Thesis advisor | Brown, Gordon |
| Thesis advisor | Cegelski, Lynette |
| Advisor | Brown, Gordon |
| Advisor | Cegelski, Lynette |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Elizabeth Morin. |
|---|---|
| Note | Submitted to the Department of Chemistry. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2017. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2017 by Elizabeth Irene Morin
Also listed in
Loading usage metrics...