https://doi.org/10.1007/s100510050184
The slope equations: A universal relationship between local structure and glass transition temperature
Laboratoire GCR (
CNRS URA 769) ,
Université Pierre et Marie Curie, Tour 22, Boite 142,
4 Place Jussieu, 75252 Paris Cedex 05, France
Corresponding author: a mmi@ccr.jussieu.fr
Received:
3
September
1997
Accepted:
17
November
1997
Published online: 15 February 1998
In this article, we present a universal relationship between the glass transition temperature Tg and the local glass structure. The derivation of the simplest expression of this relationship and some comparisons with experimental Tg values have already been reported in a recent letter. We give here the analytical expression of the parameter β of the Gibbs-Di Marzio equation and also new experimental probes for the validity of the relationship, especially in low modified binary glasses. The influence of medium range order is presented and the unusual behavior of Tg in binary B2S3 and P2S5 systems explained by the presence of modifier-rich clusters (denoted by B-B doublets).
PACS: 61.20.Ne – Structure of simple liquids / 81.20.Zx – Other methods of materials synthesis and materials processing
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1998