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Interdiffusion in the Fe2O3-TiO2 system |
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| Authors: | Zhong-shan Ren Xiao-jun Hu Shen-yang Li Xiang-xin Xue Kuo-chih Chou |
| Institution: | 1723. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China 2723. School of Metallurgical Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China 3723. School of Materials and Metallurgy, Northeastern University, Shenyang, 110006, China |
| Abstract: | 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?11cm2·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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