Effect of TiO2 on Crystallization of the Glass Ceramics Prepared from Granite Tailings

作者：Cheng Jinshu^*; Kang Junfeng; Lou Xianchun; Zhang Xiaoman; Liu Kai; Wang Wentian; Huai Xuguang

来源：JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION, 2015, 30(1): 22-26.

DOI：10.1007/s11595-015-1093-x

• glass ceramics
• crystallization kinetics
• granite tailings
• nucleating agent

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 degrees 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.

• 单位
  武汉理工大学