In this paper a thermoanalytical study of the kinetic parameters and mechanism of the devitrification process of CaO.SiO2, 1.6CaO.0.4MgO.2SiO2 and 1.4CaO.(0.6/3)Y2O3.2SiO2 is reported. The experimental results suggest that, in the studied glasses, a surface nucleation process is operative; however, in finely powdered samples, that soften and efficiently sinter before devitrifying, surface nuclei behave as bulk nuclei. In this case lamellar crystalline structures are obtained.
Devitrification Behavior of CaO-MgO(Y2O3)-SiO2 Glasses / Branda, Francesco; Costantini, Aniello; A., Buri; A., Tomasi. - In: JOURNAL OF THERMAL ANALYSIS. - ISSN 0368-4466. - ELETTRONICO. - 41:(1994), pp. 1479-1487. [10.1007/BF02549944]
Devitrification Behavior of CaO-MgO(Y2O3)-SiO2 Glasses
BRANDA, FRANCESCO;COSTANTINI, ANIELLO;
1994
Abstract
In this paper a thermoanalytical study of the kinetic parameters and mechanism of the devitrification process of CaO.SiO2, 1.6CaO.0.4MgO.2SiO2 and 1.4CaO.(0.6/3)Y2O3.2SiO2 is reported. The experimental results suggest that, in the studied glasses, a surface nucleation process is operative; however, in finely powdered samples, that soften and efficiently sinter before devitrifying, surface nuclei behave as bulk nuclei. In this case lamellar crystalline structures are obtained.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
