Effect of Ti:Fe Ratios on the Phase Structures and Properties of Iron Titanium Oxides

Abstract:

Iron titanium oxides with different Ti:Fe ratios (molar ratio: 3:1, 2:1, 1:1, 1:2, 1:3) have been prepared by chemical coprecipitation process. The structures and properties of the samples have been characterized by X-ray diffraction, vibrating sample magnetometer and UV-vis spectrophotometer. Results show that the samples annealed at 460 °C have poor crystallinity. At 550 °C, the crystallinity of all the samples increased strikingly. The iron titanium oxides contained anatase TiO₂, rutile TiO₂, α-Fe₂O₃ and/or Fe₂TiO₅. Ti:Fe ratios have a great influence on the detailed phase compositions of each sample. The iron titanium oxides exhibited paramagnetism and the intensity of magnetization increased with the increasing content of Fe. Band gap energies of the oxides changed slightly with increasing content of Fe with an average value of 2.0 eV, obviously lower than that of TiO₂ .

• Periodical: Key Engineering Materials (Volumes 602-603)
• Pages: 757-761
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.602-603.757
• Online since: March 2014
• Authors: Mei Guo, Xing Ru Xu, Xi Xin Wang, Wei Yu, Si Yu Wang, Jian Ling Zhao*
• Keywords: Fe₂TiO₅, Iron Titanium Oxides, Magnetism, TiO₂, α-Fe₂O₃

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