CRYSTAL NUCLEATION AND GROWTH IN SODA-LIME-SILICA GLASSES CLOSE TO THE NA2O-CENTER-DOT-2CAO-CENTER-DOT-3SIO(2)(NC2S3) COMPOSITION - CRYSTALNUCLEATION KINETICS IN THE STOICHIOMETRIC NC2S3 COMPOSITION

Authors
OLIVER CJRG JAMES PF
Citation
Cjrg. Oliver et Pf. James, CRYSTAL NUCLEATION AND GROWTH IN SODA-LIME-SILICA GLASSES CLOSE TO THE NA2O-CENTER-DOT-2CAO-CENTER-DOT-3SIO(2)(NC2S3) COMPOSITION - CRYSTALNUCLEATION KINETICS IN THE STOICHIOMETRIC NC2S3 COMPOSITION, Thermochimica acta, 280, 1996, pp. 223-236
Citations number
20
Categorie Soggetti
Chemistry Analytical
Journal title
Thermochimica acta → ACNP
ISSN journal
00406031
Volume
280
Year of publication
1996
Pages
223 - 236
Database
ISI
SICI code
0040-6031(1996)280:<223:CNAGIS>2.0.ZU;2-6
Abstract
For the stoichiometric NC2S3 glass (G16) non-steady-state crystal nucl eation was found for temperatures lower than 600 degrees C. For the nu cleation range similar nucleation frequencies (I) were observed on usi ng either double-stage or single-stage heating schedules. The interfac ial energy (a) and pre-exponential factor in the nucleation expression were determined using I, eta (viscosity), and calculated AG (free ene rgy driving force) values estimated independently. A reasonable value of 193mJ m(-2) was obtained for a but the pre-exponential factor was m uch greater than predicted by theory.