The effect of the addition of Ag2O on the mechanism of non-isothermal devitrification of Li2O · 2 SiO2 glass has been studied by differential thermal analysis. In both bulk and powdered samples, the presence of heterogeneous nuclei lowers the crystallization temperatures but not the value of the crystal growth activation energy. The influence of the catalyst on the crystallization mechanism is not affected by a pre vious heat treatment at the temperature of the maximum nucleation rate.
Heterogeneous bulk nucleation and differential thermal analysis / A., Marotta; A., Buri; Branda, Francesco. - In: JOURNAL OF THERMAL ANALYSIS. - ISSN 0368-4466. - ELETTRONICO. - 21:(1981), pp. 227-233.
Heterogeneous bulk nucleation and differential thermal analysis
BRANDA, FRANCESCO
1981
Abstract
The effect of the addition of Ag2O on the mechanism of non-isothermal devitrification of Li2O · 2 SiO2 glass has been studied by differential thermal analysis. In both bulk and powdered samples, the presence of heterogeneous nuclei lowers the crystallization temperatures but not the value of the crystal growth activation energy. The influence of the catalyst on the crystallization mechanism is not affected by a pre vious heat treatment at the temperature of the maximum nucleation rate.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
