The effect of a partial replacing of GeO2 by TiO2 structure and non-isothermal devitrification of lithium heptagermanate glass, examined by Fourier transform infrared spectra, differential thermal analysis and X-ray diffraction, is reported and discussed. The structure and the glass-transition temperature are not affected by the substitution of GeO2 by TiO2 but the investigated glass, unlike lithium heptagermanate glass, devitrifies only from the surface into a crystalline phase isomorphous with Li2Ge7O15 crystals. The validity of the Arrhenius-type relationship between the rate constant of crystal growth and the absolute temperature is also discussed.

THE NON-ISOTHERMAL DEVITRIFICATION OF Li2O TiO2 6GeO2 GLASS

CATAURO, Michelina
1998

Abstract

The effect of a partial replacing of GeO2 by TiO2 structure and non-isothermal devitrification of lithium heptagermanate glass, examined by Fourier transform infrared spectra, differential thermal analysis and X-ray diffraction, is reported and discussed. The structure and the glass-transition temperature are not affected by the substitution of GeO2 by TiO2 but the investigated glass, unlike lithium heptagermanate glass, devitrifies only from the surface into a crystalline phase isomorphous with Li2Ge7O15 crystals. The validity of the Arrhenius-type relationship between the rate constant of crystal growth and the absolute temperature is also discussed.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11591/198454
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