Interdiffusion in the Fe2O3-TiO2 system

被引：17
作者：
Ren, Zhong-shan [1 ,2 ]
Hu, Xiao-jun [1 ,2 ]
Li, Shen-yang [1 ,2 ]
Xue, Xiang-xin [3 ]
Chou, Kuo-chih [1 ,2 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Sch Met Ecol Engn, Beijing 100083, Peoples R China
[3] Northeastern Univ, Sch Met & Mat, Shenyang 110006, Peoples R China
来源：
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS | 2013年 / 20卷 / 03期
基金：
中国国家自然科学基金;
关键词：
interdiffusion; titanium dioxide; iron oxides; diffusion couples; electron probe microanalysis; DIFFUSION; KINETICS; FE2TIO5; GROWTH; PHASE;
D O I：
10.1007/s12613-013-0723-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Interdiffusion in the Fe2O3-TiO2 system was investigated by the diffusion couple method in the temperature range of 1323 to 1473 K. The diffusion concentration curves of Ti4+ cations were obtained by electron probe microanalysis, according to which the Boltzmann-Matano method optimized by Broeder was used to calculate the interdiffusion coefficients. The interdiffusion coefficients almost increased linearly with the mole fraction of Ti4+ cations increasing, and they were in the range of 10(-12)-10(-11) cm(2).s(-1). The increase of temperature could also lead to the increase of the interdiffusion coefficients at a constant concentration of Ti4+ cations. It was also found that the thickness growth of the diffusion layer obeyed the parabolic rate law.
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页码：273 / 278
页数：6
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