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Sol-gel synthesis and crystallisation of 3CaO center dot 2SiO(2) glassy powders
No full textA gel of composition 3CaO . 2SiO(2) was synthesised by means of sol-gel route involving hydrolysis of tetramethyl orthosilicate (TMOS) with calcium nitrate in alcoholic medium, and polycondensation reaction. The gel was submitted to DTA and TGA analysis and the resulted material was examined by FTIR spectroscopy and X-ray powder diffractometry. The thermal treatments required for the gel into glass conversion led to a partially devitrified product. The XRD analysis showed that the structure obtained is highly depolymerised. (C) 2001 Elsevier Science B.V. All rights reserved
GLASS TRANSITION TEMPERATURE AND DEVITRIFICATION BEHAVIOUR OF GLASSE IN THE Na2O 4GeO2-K2O 4GeO2 COMPOSITION RANGE
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“Metodologie sol-gel per la preparazione di polveri vetrose di germanati alcalini e loro cristallizzazione”
No full textGlass transition temperaturemand devitrification behaviour of mixed alkali germanate glasses
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