NONISOTHERMAL DEVITRIFICATION BEHAVIOR OF DIOPSIDE GLASS

Authors
BRANDA F COSTANTINI A BURI A
Citation
F. Branda et al., NONISOTHERMAL DEVITRIFICATION BEHAVIOR OF DIOPSIDE GLASS, Thermochimica acta, 217, 1993, pp. 207-212
Citations number
7
Categorie Soggetti
Chemistry Analytical
Journal title
Thermochimica acta → ACNP
ISSN journal
00406031
Volume
217
Year of publication
1993
Pages
207 - 212
Database
ISI
SICI code
0040-6031(1993)217:<207:NDBODG>2.0.ZU;2-1
Abstract
The non-isothermal devitrification of diopside CaO . MgO . 2SiO2 glass has been studied. The crystal growth activation energy has been evalu ated as E(c) +/- 137 +/- 10 kcal mol-1. The devitrification occurs in bulk samples through a surface nucleation mechanism. Surface nuclei be have as bulk nuclei in very finely powdered samples sintered before de vitrifying. Optical and scanning electron microscopy support these con clusions.