| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Glasses and Optical Materials: Current Issues and Functional Applications
|
| Presentation Title |
Revealing the Structure of the Sodium-leached Layer of Soda Lime Silica Glass: A Comprehensive Spectroscopic Analysis |
| Author(s) |
Andrew L. Ogrinc, Yuxing Zhou, Seung Ho Hahn, Yen-Ting Lin, Seong H Kim |
| On-Site Speaker (Planned) |
Andrew L. Ogrinc |
| Abstract Scope |
Acid treatment of soda lime silica glass results in incongruent leaching of sodium from the surface, with minimal dissolution of the silicate network or other cationic network modifiers. The structure of this sodium-leached region was probed using nanoscale-FTIR and molecular dynamics simulations, determining refractive index of the sodium leached layer. This allowed us to show that the enhancement of the ~950 cm-1 shoulder after Na-leaching was simply due to an optical interference effect. This study also allowed for the confident correlation of the origin of the 950 cm-1 shoulder of the pristine glass to perturbations in the silicate network which results from the network modifiers which charge compensate those non-bridging oxygen. The decrease in this spectral feature after acid treatment then corresponds to localized structural relaxations as the glass network becomes more silica like. |