| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Glasses and Optical Materials: Current Issues and Functional Applications
|
| Presentation Title |
Mixed Modifier Effects on Structural, Mechanical, Chemical, and Mechanochemical Properties of Sodium Calcium Aluminosilicate Glass |
| Author(s) |
Hongshen Liu, Andrew L. Ogrinc, Yinan Lin, Collin Wilkinson, Karan Doss, Aubrey L Fry, Conghang Qu, Hongtu He, Timothy M Gross, Nicholas J Smith, John C Mauro, Seong H Kim |
| On-Site Speaker (Planned) |
Andrew L. Ogrinc |
| Abstract Scope |
Glass properties are governed by the interplay between network formers and network modifiers; for a given composition of network formers, the ratio of different cationic modifiers compensating the anionic species in the network have a profound effect which is often non-linear, called a mixed modifier effect (MME). We have investigated the MME of sodium (Na) and calcium (Ca) in an aluminosilicate (NCAS) glass following the formula [Na2O]30-x [CaO]x [Al2O3]10[SiO2]60 where x = 0, 7.5, 15, 22.5, and 30. It was found that the NCAS glass with a [CaO] to total modifier ratio (R) within an intermittent range exhibited superior resistance to wear at high humidity, a clear MME phenomenon. A non-additive trend was also observed in hardness and indentation toughness, with aqueous corrosion resistance exhibiting a shift from incongruent to congruent corrosion, while the network structure determined by molecular dynamics simulations revealed no significant trend with composition. |