Crystallization Driving Force Of Supercooled Oxide Liquids

The driving force for crystallization can be calculated by the Gibbs free energy equation, which relies on heat capacity data. However, such data may be unavailable, which led several authors to propose new equations. Two relevant expressions are the Turnbull and Hoffman equations, which are assumed to act as boundaries for the actual value of the driving force for crystallization. The aim of this work was to test whether this assumption is valid for 65 oxide liquids, including glass formers and reluctant glass-forming compositions. These equations do not act as boundaries, but the majority of the glass formers do have a driving force within these boundaries.