Nucleation and Crystallization of a Lithium Aluminosilicate Glass |
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| Authors: | Luisa Barbieri Cristina Leonelli Tiziano Manfredini Cristina Siligardi Anna Bonamartini Corradi Piercarlo Mustarelli Corrado Tomasi |
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| Affiliation: | Department of Chemistry, University of Modena, 41100 Modena, Italy;CSTE-CNR and Department of Physical Chemistry, University of Pavia, 27100 Pavia, Italy |
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| Abstract: | An aluminosilicate glass of composition 61SiO26Al2O310MgO6ZnO·12Li2O·5TiO2 (mol%) has been prepared by a melting process and investigated as far as crystallization is concerned. Glass-ceramic is easily obtained because glass shows a high tendency to crystallize starting from 700°C. The crystalline phases evolve with temperature, showing the aluminosilicates to be the main phase up to 1050°C, followed by metasilicates and silicates, some of which have lower melting points. The titanates of Mg and Zn develop from the phase-separated glass, soon after T g, and grow to form nucleation centers for the other crystalline phases. The evolution from phase-separated glass to glass-ceramic has been followed by many thermal, diffractometric, spectroscopic, and microscopic techniques. |
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