Prediction of glass forming regions in mixed-anion phosphate glasses

Fluoro-sulfo-phosphate glasses with rich ligand situations and excellent thermal stability are promising host materials for optically active species, injection moulding and low-temperature sealing, which have received a significant amount of interest in recent years. Herein, the glass-forming regions of such inverted glass systems are predicted via the thermodynamic method. Based on this, the actual glass formation areas are further determined by the experiments. The liquidus and eutectic points of the binary systems are calculated and the deviations in composition between the calculated results and available phase diagrams are determined with a small deviation (<6 mol%). Meanwhile, the glass-forming regions are derived quantitatively, which are relatively in agreement with the experimental results. These results demonstrate that it is practical to predict the formation regions of fluoro-sulfo-phosphate glass systems based on thermodynamic calculation, providing an effective and predictive method for the development of new glass systems.