A model of glass transition in binary and ternary glasses

✍ Scribed by Richard Kerner; Matthieu Micoulaut

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 512 KB
• Volume: 71
• Category: Article
• ISSN: 0167-7322
• DOI: 10.1016/s0167-7322(97)00009-3

✦ Synopsis

We propose a simple model of glass formation for various types of covalent and network glasses: binary covalent glasses, with the composition denoted by X~Y,~ + x MpYq, with X an element of III-rd or IV-th group (e.g. B, Al, or Si, ae), while MpYq is an alkali oxide or chalcogenide; next, the covalent network formers of the type A, BI-~, e.g.

Ge~ Sel-~, Si, Tel-~, etc. Finally, certain ternary glasses, with two different modifiers present, are also discussed. A simple formula relating the glass transition temperature Tg to the modifier consentration is derived. We give examples which show a good agreement of our formula with the experimental data.