Dissolution and diffusion of TiO2 in the CaO-Al2O3-SiO2 slag

被引：1
|
作者：
Zhong-shan Ren [1 ,2 ]
Xiao-jun Hu [1 ]
Xin-mei Hou [2 ]
Xiang-xin Xue [3 ]
Kuo-chih Chou [1 ,2 ]
机构：
[1] State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing
[2] School of Materials and Metallurgy,Northeastern University
[3] School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing
来源：
International Journal of Minerals Metallurgy and Materials | 2014年 / 21卷 / 04期
关键词：
slags; titanium dioxide; dissolution; diffusion; interface;
D O I：
暂无
中图分类号：
X756 [冶金工业];
学科分类号：
083002 ;
摘要：
The dissolution of TiO2 in the CaO-Al2O3-SiO2 slag under static conditions was studied in the temperature range from 1643 K to 1703 K. After TiO2 dissolved, the microstructure of the interface between TiO2 and the slag was observed by scanning electron microscopy, and the concentration profiles of Ti4+ and other ions across the TiO2/slag interfaces were analyzed by energy-dispersive X-ray spectroscopy. On the basis of these results, the dissolution behavior of TiO2 was evaluated, and the diffusivity of Ti4+ in the bulk slag was estimated. According to the Stokes–Einstein relation, the viscosity calculated by a previously reported model gave a diffusivity of Ti4+ ions greater than that estimated by the concentration profiles of Ti4+ ions. The mechanism of TiO2 dissolution in the CaO-Al2O3-SiO2 slag is discussed in detail.
引用
收藏
页码：345 / 352
页数：8
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