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Magnetic Properties of Hematite-Titania Nanocomposites from Ilmenite Leachant Solutions

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Abstract

Different Fe2O3/TiO2 nanocomposite ratios have been auto-synthesized from the leaching solution of Egyptian ilmenite ore with and without solvent extraction of soluble iron ions. Hydrolysis-hydrothermal strategy was then implemented for preparation of Fe2O3-TiO2 nanocomposites. The x-ray diffraction results indicated that rutile and hematite were only found at high iron oxide content. Meanwhile, anatase and hematite were the predominant phases at low iron oxide content. High-resolution transmission electron microscopy investigations exhibited nano-rods like morphology and the space lattice distances of TiO2 and Fe2O3 were clearly estimated. Moreover, the chemical composition of different Fe2O3-TiO2 nanocomposites was also elucidated using energy dispersive spectroscopy and Fourier transform infrared analyses techniques. The values of saturation magnetization (M s) and remanent magnetization (M r) were noticeably increased by 17.5% and 18.4% with increasing the Fe2O3/TiO2 molar ratio from 1.0 to 3.0, respectively. Field cooling-warming magnetization studies showed that the Morin transition temperature (T M = 200 K) was consistent with the previously published values.

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Acknowledgements

The authors would extend their honest appreciation to the Central Metallurgical Research and Development Institute (CMRDI), Cairo, Egypt for its financial support to implement this work.

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  1. Central Metallurgical R & D Institute, P.O. Box 87, Helwan, Cairo, 11421, Egypt

    M. M. S. Sanad & M. M. Rashad

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Correspondence to M. M. S. Sanad or M. M. Rashad.

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Sanad, M.M.S., Rashad, M.M. Magnetic Properties of Hematite-Titania Nanocomposites from Ilmenite Leachant Solutions. J. Electron. Mater. 46, 4426–4434 (2017). https://doi.org/10.1007/s11664-017-5438-4

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