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Viscous Flow vs Phase Separation During Calorimetric Analysis of Fluoride Glasses
Author(s) -
Drehman Alvin J.
Publication year - 1986
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1986.tb07397.x
Subject(s) - differential scanning calorimetry , endothermic process , fluoride , crystallization , glass transition , materials science , phase (matter) , flow (mathematics) , calorimeter (particle physics) , phase transition , analytical chemistry (journal) , thermodynamics , heat flow , mineralogy , composite material , chemistry , chromatography , mechanics , optics , polymer , inorganic chemistry , physics , thermal , detector , organic chemistry , adsorption
Differential scanning calorimeter traces of heavy‐metal fluoride glasses can display an endothermic feature between the glass transition and the onset of crystallization. It is shown that this feature can be the result of viscous flow occurring during heating and is not necessarily a second glass transition, attributable to the coexistence of two vitreous phases.