NONISOTHERMAL CRYSTALLIZATION OF LA2O3-CENTER-DOT-B2O3-CENTER-DOT-2GEO(2) GLASSES

Authors
SIGAEV VN LOPATINA EV SARKISOV PD MAROTTA A PERNICE P
Citation
Vn. Sigaev et al., NONISOTHERMAL CRYSTALLIZATION OF LA2O3-CENTER-DOT-B2O3-CENTER-DOT-2GEO(2) GLASSES, Thermochimica acta, 286(1), 1996, pp. 25-31
Citations number
21
Categorie Soggetti
Chemistry Analytical
Journal title
Thermochimica acta → ACNP
ISSN journal
00406031
Volume
286
Issue
1
Year of publication
1996
Pages
25 - 31
Database
ISI
SICI code
0040-6031(1996)286:1<25:NCOL>2.0.ZU;2-4
Abstract
The non-isothermal crystallization of lanthanum borogermanate glasses, of stoichiometry LaBGeO5 has been studied by differential thermal ana lysis. The phase that crystallizes during the DTA runs was identified by X-ray diffraction as the stillwellite-like LaBGeO5. In the glasses studied, crystallization from surface nuclei was found to be dominant. The activation energy of crystal growth, evaluated from DTA curves, w as about 465 kJ mol(-1).