Crystallization Kinetics of a Complex Lithium Silicate Glass‐Ceramic
Authors:
- 1 August 1987
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 70 (8) , 577-582
Abstract
Volume crystallization of this glass is nucleated by Li 3 PO 4 . On heating from room temperature, Li 2 SiO 3 appears around 650°C and then converts to Li 2 Si 2 O 5 around 850°C by reaction with SiO 2 from the melt. Preheating the glass at 1000°C forms larger Li 3 PO 4 nuclei that promote additional crystallization of cristobalite in the 650° to 850°C range. Crystallization activation energies calculated from scan‐rate dependence of DTA peaks are 270 kJ/mol for Li 2 SiO 3 and 360 to 570 kJ/mol for Li 2 Si 2 O 5 .Keywords
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