Loading…
Fragility percentage evaluation for glass forming melts
The dependence of the viscosity on temperature for glass forming melts separates them into two categories: fragile and strong. We propose an intuitive method for quantitative evaluation of the glass forming melts fragility by a structural parameter - fragility percentage pF which allows the comparis...
Saved in:
Published in: | Journal of Optoelectronics and Advanced Materials 2007-12, Vol.9 (12), p.3765-3768 |
---|---|
Main Authors: | , , |
Format: | Article |
Language: | English |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | The dependence of the viscosity on temperature for glass forming melts separates them into two categories: fragile and strong. We propose an intuitive method for quantitative evaluation of the glass forming melts fragility by a structural parameter - fragility percentage pF which allows the comparison of the glass melts without considering their particular chemical composition. A strong correlation between fragility percentage and the main number of non-bridged oxygen (Onb) was established. The study is also related to a numerical application of the proposed indicator made for glass with different chemical compositions compared with the base oxide system Na2O-SiO2. The greater the basicity of the glasses the more fragile character of the glass forming melts is observed. |
---|---|
ISSN: | 1454-4164 |