Fe fine particles encapsulated by titanium oxides with high magnetization for biomedical application |
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Authors: | Hisato Tokoro Yasushi KanekoMariko Adachi Takashi NakabayashiShigeo Fujii |
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Affiliation: | Hitachi Metals Ltd., Advanced Electronics Research Laboratory, 5200 Mikajiri, Kumagaya, Saitama 360-0843, Japan |
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Abstract: | Iron (Fe) fine particles encapsulated by titanium oxide (TiO2) were synthesized through a solid-phase reaction. The structure of Fe cores and TiO2 shells consisted of α-Fe and rutile TiO2, respectively. The average particle size was 0.8 μm, in which a Fe particle with a diameter of ∼750 nm was encapsulated by a TiO2 shell with a thickness of ∼100 nm. The Fe particles had a high saturation magnetization of 127 Am2/kg and low coercivity of 1.6 kA/m. They also exhibited excellent corrosion resistance, similar to Fe3O4 in a soaking test. |
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Keywords: | Magnetic fine particles Solid-phase reaction Metal Fe High magnetization Corrosion resistance |
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