Progressive reversibility of glass

- Jul 06, 2020-

Progressive reversibility

The process of the glassy substance from the molten state to the solid state is gradual, and the change of its physical and chemical properties is continuous and gradual.This is obviously different from the crystallization process of the melt, in which new phases are bound to appear and many properties will change around the crystallization temperature point.The transition from the molten state to the solid state is completed within a wide temperature range. As the temperature gradually decreases, the glass melt viscosity gradually increases and finally forms solid glass, but no new phase is formed in the process.In contrast, the process of heating glass to melt is gradual.