A novel view on classification of glass-forming liquids and empirical viscosity model

TL;DR

This paper introduces a new viscosity model with only two parameters that accurately describes glass-forming liquids over a wide temperature range, revealing a new perspective on classifying fragile and strong glass-formers.

Contribution

It proposes a novel scaling approach using an original temperature scale, enabling better classification and understanding of glass-forming liquids and their crystallization kinetics.

Findings

High accuracy in fitting experimental viscosity data

Emergence of a new boundary between fragile and strong glass-formers

Potential for generalized scaling in crystallization studies

Abstract

In the last few decades, theoretical and experimental studies of glass-forming liquids have revealed presence of universal regularities in the viscosity-temperature data. In the present work, we propose a viscosity model for scaling description of experimental viscosity data. A feature of this model is presence of only two adjustable parameters and high accuracy of experimental data approximation by this model for a wide temperature range. The basis of the scaling description is an original temperature scale. Within this scaling description we obtain the transformed Angell plot, in which the area separating "fragile" and "strong" glass-formers emerges. The proposed scaling procedure make it possible to reconsider belonging some liquids to the type of "fragile" glass-formers. The obtained results form basis for development of a generalized scaling description of crystallization kinetics in supercooled liquids and glasses.