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- Publisher
- Springer Journals
- Copyright
- Copyright © 2004 by Central South University
- Subject
- Engineering; Engineering, general; Metallic Materials
- ISSN
- 1005-9784
- eISSN
- 1993-0666
- DOI
- 10.1007/s11771-004-0048-8
- Publisher site
- See Article on Publisher Site
Abstract
The basic glass of Li2O-Al2O3-SiO2 system using P2O5 as nucleator was prepared by means of conventional melt quenching technology, and the heat-treatment process was determined by using differential thermal analysis. The crystalline phases and the microstructure of the glass-ceramics were investigated by using X-ray diffraction and scanning electron microscopy. The results show that the glass based on Li2O-Al2O3-SiO2 oxides using P2O5 as nucleator can be prepared at lower melt temperature of 1450°C and the glass-ceramics with lower thermal expansion coefficient of 21.6 × 10−7°C−1 can also be obtained at 750°C. The glass-ceramics contain a few crystal phases in which the main crystal phase is β-quartz solid solution and the second crystal phase is β-spodumene solid solution. When the heat treatment temperature is not higher than 650°C, the transparent glass-ceramics containing β-quartz solid solution can be prepared. β-quartz solid solution changes into β-spodumene solid solution at about 750°C. And the appearance of the glass-ceramics changes from translucent, part opaque to complete opaque with increasing temperature.
Journal
Journal of Central South University of Technology – Springer Journals
Published: Jun 15, 2004