Publicação: Effect of high pressure in the Li2O-2SiO(2) crystallization
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Elsevier B.V.
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Resumo
The aim of this work was to investigate the effect of previous treatments at high pressures on the crystallization kinetics of monolithic samples of a Li2O-2SiO(2) (LS2) glass. The glass transition temperature (T-g) and the temperature of the onset of crystallization (T-p) obtained by differential thermal analyses (DTA) were measured for LS2 glass samples submitted to isostatic pressures ranging from 2.5 to 7.7 GPa during 5 min at room temperature. The observed systematic changes in T-g and T-p were probably related to the cracks induced by high pressure inside the monolithic samples and in its surface. Away from the cracks, the nucleation density slightly decreased as a function of pressure but along the cracks, the nucleation density was significantly higher. (C) 2010 Elsevier B.V. All rights reserved.
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Glass-ceramic, High pressure, Thermal analysis, Crystallization
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Inglês
Como citar
Journal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 356, n. 52-54, p. 3004-3008, 2010.
