Effect of high pressure in the Li2O-2SiO(2) crystallization
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Data
2010-12-01
Autores
Buchner, S.
Soares, P.
Pereira, A. S.
Ferreira, E. B. [UNESP]
Balzaretti, N. M.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
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.
Descrição
Palavras-chave
Glass-ceramic, High pressure, Thermal analysis, Crystallization
Como citar
Journal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 356, n. 52-54, p. 3004-3008, 2010.