glass transition

https://doi.org/10.1351/goldbook.G02640
A second-order transition in which a supercooled melt yields, on cooling, a glassy structure. Below the glass-transition temperature the physical properties vary in a manner similar to those of the crystalline phase. Example: Lithium disilicate crystals melt at 1305 K; the melt can be supercooled to the glass-transition temperature at approximately 773 K below which the viscous liquid freezes to a rigid amorphous glass.
Source:
PAC, 1994, 66, 577. (Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)) on page 583 [Terms] [Paper]
Citation: 'glass transition' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.G02640 RIS BibTex EndNote
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Last revised: February 24, 2014