Effect of TiO2 on Crystallization of the Glass Ceramics Prepared from Granite Tailings
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2015年第1期
论文作者：程金树 KANG Junfeng LOU Xianchun ZHANG Xiaoman
文章页码：22 - 26
摘 要：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 ℃ 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 twodimensional crystallization mechanism. The activation energies for phase separation and crystallization of augite were 321.75 and 698.83 k J/mol, respectively.
程金树1，KANG Junfeng1，LOU Xianchun1，ZHANG Xiaoman1
1. Key Laboratory of Silicate Materials Science and Engineering, Wuhan University of Technology,Ministry of Education
摘 要：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 ℃ 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 twodimensional crystallization mechanism. The activation energies for phase separation and crystallization of augite were 321.75 and 698.83 k J/mol, respectively.
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