Structure and properties of the lithium aluminosilicate glasses with yttria addition

Abstract

The structure and properties of lithium aluminosilicate glasses containing Y₂O₃ were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), differential thermal analysis (DTA) and Raman spectroscopy. Effects of yttria on the viscosity of LAS glasses were investigated, and found that the introduction of yttria effectively decreased the viscosity of LAS glasses. In Raman spectra of initial glasses it is shown the starting glasses are in almost complete disorder, since all bands are weak and broad. In the spectra of heat-treated specimens some new narrow bands appear and increase in intensity, and the frequency changes with varied yttria addition. The DTA and XRD results show that yttria controlled the crystallization of LAS glasses by increasing the crystallization peak temperature (T _p), however, the main crystalline phase of glass-ceramics was β-spodumene.

Keywords

glass-ceramics / structure / crystallization / Raman spectroscopy

References

[1] Beall G. H., Pinckney L. R. Nanophase Glass-ceramics[J]. J. Am. Ceram.Soc., 1999, 82: 5-16.

[2] Arnault L., Gerland M., Riviere A., . Microstructural Study of Two LAS-type Glass-ceramics and Their Parent Glass[J]. J. Mater. Sci., 2000, 35: 2331-2345.

[3] Riello P., Canto P., Comelato N., . Nucleation and Crystallization Behavior of Glass-ceramic Materials in the Li₂O-Al₂O₃-SiO₂ System of Interest for Their Transparency Properties[J]. J. Non-Cryst. Solids, 2001, 288: 127-133.

[4] Hou Z. X., Zhang Y. M., Zhang H. B., . Preparation and Characterization of Zinc Aluminosilicate Transparent Glassceramics[J]. J. Wuhan Univ. Technol.-Mater. Sci.Ed., 2006, 21: 110-113.

[5] Hsu J. Y., Speyer R. F. Influences of Zirconia and Silicon Nucleating Agents on the Devitrification of Li₂O·Al₂O₃·6SiO₂ Glasses[J]. J. Am. Ceram. Soc., 1990, 73: 3585-3593.

[6] Maier V., Mueller G. Mechanism of Oxide Nucleation in Lithium Aluminosilicate Glass-ceramics[J]. J. Am. Ceram. Soc., 1987, 70: 176-178.

[7] Wang M. C., Hon M. H. Effect of CaO Addition on Crystallization Processes of Li₂O-Al₂O₃-SiO₂-TiO₂ Glasses[J]. J. Ceram. Soc. Jpn., 1992, 100: 1285-1291.

[8] Barbieri L., Corradi A. B., Leonelli C., . Effect of TiO₂ Addition on the Properties of Complex Aluminosilicate Glasses and Glassceramics[J]. Mater. Res. Bull., 1997, 32: 637-648.

[9] Elshennawi A. W. A., Hamzawy E. M. A., Khater G. A., . Crystallization of Some Aluminosilicate Glasses[J]. Ceram. Int., 2001, 27: 725-730.

[10] Hu A. M., Liang K. M., Zhou F., . Phase Transformations of Li₂O-Al₂O₃-SiO₂ Glasses with CeO₂ Addition[J]. Ceram. Int., 2005, 31: 11-14.

[11] Shyu J. J., Lue C. Y. Addition of GeO₂ to Reduce the Viscosity of Parent Glasses for Low-expansion, Transparent Glass-ceramics Containing High-quartz Solid Solution[J]. J. Am. Ceram. Soc., 2006, 89: 3235-3239.

[12] Shyu J. J., Hwang C. S. Effects of Y₂O₃ and La₂O₃ Addition on the Crystallization of Li₂O·Al₂O₃·4SiO₂ Glass-ceramic[J]. J. Mater. Sci., 1996, 31: 2631-2639.

[13] Chuvaeva T. I., Dymshits O. S., Petrov V. I., . Low-frequency Raman Scattering of Magnesium Aluminosilicate Glasses and Glass-ceramics[J]. J. Non-Cryst. Solids, 2001, 282: 306-316.

[14] Bae S. J., Kang U. k., Shashkin A., . Raman Spectroscopy Study of Phase Transformations in Titania-containing Lithium Aluminosilicate Glasses Doped with CoO[J]. J. Non-Cryst. Solids, 2005, 351: 2969-2978.