Abstract
In this work, we have observed the crystallization process of Li2O-Al2O3-SiO2 glass using a high-temperature confocal laser scanning microscope and studied its crystallization kinetics with differential thermal analysis. The value of activation energy has been calculated out using Kissinger and Flynn–Wall–Ozawa methods. The results show that LiAlSi3O8 crystal particles precipitate at 850 °C, and then gradually grow to 75 um with the irregular hexagonal structure until 980 °C. The activation energy of two exothermal peaks through Kissinger method is 121.78 ± 13.42 and 189.74 ± 7.76 kJ/mol. Glass transition and crystallization both have remarkable kinetics effects, and kinetic crystallization parameter, Avrami index (n), indicates that crystallization mechanism of two exothermal peaks corresponds to one-dimensional and surface crystallization, respectively.
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