The devitrification behavior of sodium germanate glasses, examined by Fourier transform infrared spectroscopy, differential thermal analysis and X-ray diffraction is reported. The glass compositions are expressed by the general formula: xNa2O·(1 -x)GeO2 with x = 0.100; 0.125; 0.200; 0.250 and 0.333. The glass transition temperature values do not change linearly with the increase in Na2O content but go through a maximum at x = 0.200. The phases crystallizing during DTA runs were identified and devitrification mechanisms proposed. The effect on devitrification processes of the specific surface area of the samples was also pointed out

NON-ISOTHERMAL DEVITRIFICATION OF SODIUM GERMANATE GLASSES

CATAURO, Michelina;
2003

Abstract

The devitrification behavior of sodium germanate glasses, examined by Fourier transform infrared spectroscopy, differential thermal analysis and X-ray diffraction is reported. The glass compositions are expressed by the general formula: xNa2O·(1 -x)GeO2 with x = 0.100; 0.125; 0.200; 0.250 and 0.333. The glass transition temperature values do not change linearly with the increase in Na2O content but go through a maximum at x = 0.200. The phases crystallizing during DTA runs were identified and devitrification mechanisms proposed. The effect on devitrification processes of the specific surface area of the samples was also pointed out
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11591/236036
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