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| Synthesis of the Plate–shaped Barium Ferrites by the Second Chemical Co–precipitation Method and Investigation of the Magnetic Properties |
| MENG Jinhong1, CHEN Weihong1, LIU Yu1, SUN Jie1, CAO Xiaohui1, WANG Wenju1, YU Mingxun2 |
1.School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110168
2.The 53rd Research Institute of China Ordnance Industry Group Corporation, Jinan 250031 |
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Cite this article:
MENG Jinhong CHEN Weihong LIU Yu SUN Jie CAO Xiaohui WANG Wenju YU Mingxun. Synthesis of the Plate–shaped Barium Ferrites by the Second Chemical Co–precipitation Method and Investigation of the Magnetic Properties. Chin J Mater Res, 2012, 26(1): 107-112.
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Abstract Hexagonal plate–shaped BaFe12O19 ferrites are prepared by the second chemical coprecipitation method using co-precipitation synthesized–BaFe12O19 ferrites as template materials. The particle size of the prepared plate-shaped BaFe12O19 ferrites is in the range of 0.4-2 μm with a diameterto-thickness ratio of 4–20. The synthesis process is studied by using XRD, FTIR, TG/DTA, SEM/EDS. It is shown that the precursor was a composite of BaFe12O19 coated by non–crystalline BaCO3, low-crystalline Fe(OH)3 and crystalline α–Fe2O3. During calcinations,the precursor experiences dehydration of Fe(OH)3, decomposition of BaCO3, and the reaction of α–Fe2O3 and BaO, and finally produces BaFe12O19. The prepared plated–shaped BaFe12O19 ferrite presents a higher coercivity and lower saturation magnetization and remanence, owing to its higher purity, slightly poor crystallinity, larger radial size and diameter–length ratio.
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Received: 25 March 2011
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| Fund: Supported by General Armament Ministry No.51310060303. |
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