Physical Properties of Quenched Glasses in the Li2O-ZrO2-SiO2 System |
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Authors: | Antonio Pedro Novaes de Oliveira Luisa Barbieri Cristina Leonelli Tiziano Manfredini Gian Carlo Pellacani |
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Affiliation: | Department of Chemistry, Faculty of Engineering, University of Modena, 41100 Modena, Italy |
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Abstract: | The behavior and some physical and thermal properties of a 30Li2O-70SiO2 base glass composition with addition of ZrSiO4 in the as-quenched state was investigated with the aid of X-ray diffraction (XRD), differential thermal analysis (DTA), thermal expansion and microhardness measurements, as well as density measurements. Transparent glasses prepared by the addition of ZrSiO4 up to 10.30 mol% were obtained. ZrSiO4 was found to decrease the expansion coefficient of the investigated glasses from 11.0 × 10−6 to 7.96 × 10−6°C−1. The glass transition and softening point temperatures of the glasses showed a reverse behavior. On the other hand, both hardness and density increased for successive increases of the ZrSiO4 amounts, with the highest values of 6.3 GPa and 2.65 g/cm3, respectively. |
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