Abstract
By a progressive weight percent substitution of CaO for SiO2, the effect of CaO addition on the crystallization processes of Li2O-Al2O3-SiO2-TiO2 glasses was studied. The crystallization rate was inversely proportional to CaO content. The isothermal kinetics of crystallization of β-spodumene from the Li2O-CaO-Al2O3-SiO2-TiO2 glasses was investigated using quantitative X-ray diffraction (XRD) method. For samples in which CaO contents are 5, 9 and 13wt%, the activation energies for crystal growth were 249.4kJ/mol, 151.9kJ/mol and 189.1kJ/mol, respectively. The growth morphology parameter m=2 was found, showing rod-like growth.
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