Abstract
The effect of TiO2 on the crystallization behaviors of the glass ceramics prepared from granite tailings was investigated by differential scanning calorimetry (DSC), X-ray diffraction (XRD), and field emission scanning electron microscopy (FESEM). The results showed that the crystallization peak temperature decreased firstly, and then increased with the increase of TiO2 content. The optimum addition amount of TiO2 was 8 wt%. With a single-step heat treatment at 924 °C for 1 h, augite precipitated as the only crystalline phase both on the surface and in the interior. The avrami parameter of the sample was 3.25, suggesting a two-dimensional crystallization mechanism. The activation energies for phase separation and crystallization of augite were 321.75 and 698.83 kJ/mol, respectively.
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Funded by the National Key Technology Support Program of China (No. 2012BAA10B03) and Hubei Provincial Science and Technology Department, China(No. 2012BAA1001)
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Cheng, J., Kang, J., Lou, X. et al. Effect of TiO2 on crystallization of the glass ceramics prepared from granite tailings. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 30, 22–26 (2015). https://doi.org/10.1007/s11595-015-1093-x
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DOI: https://doi.org/10.1007/s11595-015-1093-x