The non-isothermal devitrification of diopside CaO . MgO . 2SiO2 glass has been studied. The crystal growth activation energy has been evaluated as E(c) +/- 137 +/- 10 kcal mol-1. The devitrification occurs in bulk samples through a surface nucleation mechanism. Surface nuclei behave as bulk nuclei in very finely powdered samples sintered before devitrifying. Optical and scanning electron microscopy support these conclusions.
Nonisothermal Devitrification Behavior of Diopside Glass / Branda, Francesco; Costantini, Aniello; A., Buri. - In: THERMOCHIMICA ACTA. - ISSN 0040-6031. - STAMPA. - 217:(1993), pp. 207-212. [10.1016/0040-6031(93)85109-M]
Nonisothermal Devitrification Behavior of Diopside Glass
BRANDA, FRANCESCO;COSTANTINI, ANIELLO;
1993
Abstract
The non-isothermal devitrification of diopside CaO . MgO . 2SiO2 glass has been studied. The crystal growth activation energy has been evaluated as E(c) +/- 137 +/- 10 kcal mol-1. The devitrification occurs in bulk samples through a surface nucleation mechanism. Surface nuclei behave as bulk nuclei in very finely powdered samples sintered before devitrifying. Optical and scanning electron microscopy support these conclusions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
