Abstract
The crystallization behavior and microstructure of MgO–Al 2O 3–SiO 2 glasses containing TiO 2 were investigated by means of differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The crystallization kinetic parameters including the crystallization apparent activation energy ( E) and the Avrami parameter ( n) were also measured with Ozawa and Kissinger methods. The results have shown that: The glass first underwent extensive phase separation into titanium-rich droplets in a silica-rich matrix, then magnesium aluminotitanate (MAT) initially precipitated in the droplet phase. As a result the E values of cordierite was decreased, thus the formation of cordierite crystals were promoted.
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