Magnetic properties of barium ferrite synthesized using a microemulsion mediated process |
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| Institution: | 1. State Key laboratory of Marine Resource Utilization in South China Sea, Hainan Univertisiy, Haikou 570228, China;2. Hainan Provincial Key Laboratory of Research on Utilization of S-Zr-Ti Resources, Haikou 570228, China;3. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China;1. Physics Department, College of Sciences, Shiraz University, Shiraz 71946-84795, Iran;2. Physics Department, Isfahan University of Technology, Isfahan 84156-83111, Iran;3. Physics Department, Higher Education Center of Eghlid, Eghlid 7381943885, Iran |
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| Abstract: | Ultrafine barium ferrite particles have been synthesized using a microemulsion mediated process. The aqueous cores (typically 10–25 nm in size) of water-in-oil microemulsions were used as constrained microreactors for the precipitation of precursor carbonates of Ba2+ and Fe3+. These precursors (5–15 nm in size) when heated at 950°C, transformed to the hexagonal ferrite BaFe12O19 as confirmed by X-ray diffraction. This barium ferrite powder had an intrinsic coercivity of 5089 Oe and a saturation magnetization of 60.1 emu/g. |
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