CRYSTALLIZATION OF SOL-GEL-DERIVED GLASS-CERAMIC POWDERS IN THE CAO-MGO-AL2O3-SIO2 SYSTEM

Authors
Citation
M. Sales et J. Alarcon, CRYSTALLIZATION OF SOL-GEL-DERIVED GLASS-CERAMIC POWDERS IN THE CAO-MGO-AL2O3-SIO2 SYSTEM, Journal of Materials Science, 29(19), 1994, pp. 5153-5157
Citations number
19
Categorie Soggetti
Material Science
ISSN journal
00222461
Volume
29
Issue
19
Year of publication
1994
Pages
5153 - 5157
Database
ISI
SICI code
0022-2461(1994)29:19<5153:COSGPI>2.0.ZU;2-V
Abstract
Samples in the anorthite primary crystallization field were prepared i n the CaO-MgO-Al2O3-SiO2 quaternary system by sol-gel techniques. The homogeneous dried gels were characterized by infrared spectroscopy, th ermal analysis and electron microscopy, The crystallization of gel-lik e glass as a function of temperature was followed by X-ray diffraction . Anorthite was detected as the only crystalline phase. Thermal analys is results indicated a mechanism of crystal growth dominated by surfac e nucleation. This fact could be related to the small size of the prim ary particles observed by electron microscopy.