Effect of TiO2 on crystallization of the glass ceramics prepared from granite tailings

Autor:	Jinshu Cheng, Xianchun Lou, Liu Kai, Xiaoman Zhang, Junfeng Kang, Wang Wentian, Huai Xuguang
Rok vydání:	2015
Předmět:	Diffraction Materials science Metallurgy Nucleation engineering.material Tailings law.invention Augite Differential scanning calorimetry Chemical engineering law Phase (matter) visual_art engineering visual_art.visual_art_medium General Materials Science Ceramic Crystallization
Zdroj:	Journal of Wuhan University of Technology-Mater. Sci. Ed.. 30:22-26
ISSN:	1993-0437 1000-2413
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3e47b07b75af73de09f00e02cbf083ca https://doi.org/10.1007/s11595-015-1093-x Zobrazit plný text záznamu Full text from SpringerLink