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邢相栋,刘依然,巨建涛,刘漫博,陈云飞.FeTiO3-Fe2O3固溶体合成及其碳热还原研究[J].稀有金属材料与工程(英文),2018,47(9):2775~2781.[Xiang-dong Xing,Yi-ran Liu,Jian-tao Ju,Man-bo Liu and Yun-fei Chen.Synthesis and non-isothermal carbothermic reduction of FeTiO3-Fe2O3 solid solution systems[J].Rare Metal Materials and Engineering,2018,47(9):2775~2781.]
Synthesis and non-isothermal carbothermic reduction of FeTiO3-Fe2O3 solid solution systems
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Received:October 18, 2016  Revised:April 13, 2017
DOI:
Key words: titanium-iron solid solution  phase transformation  non-isothermal reaction
Foundation item:国家自然科学基金资助(项目号51604209)
Author NameAffiliation
Xiang-dong Xing,Yi-ran Liu,Jian-tao Ju,Man-bo Liu and Yun-fei Chen  
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Abstract:
      To exam the carbothermic reduction behaviors of the (1-x)FeTiO3?xFe2O3 solid solutions with various x value, the solid solutions were artificially synthesized successfully and then subjected to non-isothermal carbothermic reduction. The results show that the solid solutions synthesized in laboratory were uniform texture and high purity. Meanwhile, lattice distortion degree of FeTiO3 was greater with increasing the value of x, and the initial reduction temperature and reduction rate which is the increasing rate of reduction degree α were also improved. The reduction could be improved for FeTiO3 as Fe2O3 dissolving, and the Fe2TiO4 as well as Fe3Ti3O10 were existed as the transition phase in the reduction process. FeO, Fe2TiO4 and TiO2 were firstly generated in the interface of solid - graphite, and then reduced to Fe and Ti2O3. It is concluded that the apparent activation energy of 295.54 kJ/mol from the calculation and analysis of the non-isothermal kinetics for the carbon thermal reduction process.