DEVITRIFICATION BEHAVIOR OF CAO-MGO(Y2O3)-SIO2 GLASSES

Authors
BRANDA F COSTANTINI A BURI A TOMASI A
Citation
F. Branda et al., DEVITRIFICATION BEHAVIOR OF CAO-MGO(Y2O3)-SIO2 GLASSES, Journal of thermal analysis, 41(6), 1994, pp. 1479-1487
Citations number
10
Categorie Soggetti
Chemistry Analytical
Journal title
Journal of thermal analysis → ACNP
ISSN journal
03684466
Volume
41
Issue
6
Year of publication
1994
Pages
1479 - 1487
Database
ISI
SICI code
0368-4466(1994)41:6<1479:DBOCG>2.0.ZU;2-K
Abstract
In this paper a thermoanalytical study of the kinetic parameters and m echanism of the devitrification process of CaO.SiO2, 1.6CaO.0.4MgO.2Si O2 and 1.4CaO.(0.6/3)Y2O3.2SiO2 is reported. The experimental results suggest that, in the studied glasses, a surface nucleation process is operative; however, in finely powdered samples, that soften and effici ently sinter before devitrifying, surface nuclei behave as bulk nuclei . In this case lamellar crystalline structures are obtained.