Preparation of Ba-Hexaferrite Nanocrystals by an Organic Ligand-Assisted Supercritical Water Process
作者： Dinesh Rangappa , Takashi Naka , Satoshi Ohara , Tadafumi Adschiri
DOI: 10.1021/CG900941P
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摘要: We are reporting a novel synthetic approach to prepare organic modified Ba-hexaferrite nanocrystals with controlled size and morphology under supercritical water (SCW) flow reactor process. The surface of the nanocrystal was capped oleic acid ligand control particle growth, size, morphology. results showed that concentration reagent played key role in controlling cubic octahedral shape nanocrystals. This indicates were greatly influenced by modification SCW process, resulting drastic reduction from 30 9 nm. exhibit higher coercivity (about 2800 Oe) at 5 280 K temperature. study provides for large-scale production complex metal oxide colloidal uniform well-defined shape, chemistry.
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M. Kempaiah Devaraju, Shu Yin, Tsugio Sato, A Fast and Template Free Synthesis of Tb:Y2O3 Hollow Microspheres Via Supercritical Solvothermal Method Crystal Growth & Design. ,vol. 9, pp. 2944- 2949 ,(2009) , 10.1021/CG9002934
D Primc, D Makovec, D Lisjak, M Drofenik, Hydrothermal synthesis of ultrafine barium hexaferrite nanoparticles and the preparation of their stable suspensions Nanotechnology. ,vol. 20, pp. 315605- ,(2009) , 10.1088/0957-4484/20/31/315605
V.V. Pankov, M. Pernet, P. Germi, P. Mollard, Fine hexaferrite particles for perpendicular recording prepared by the coprecipitation method in the presence of an inert component Journal of Magnetism and Magnetic Materials. ,vol. 120, pp. 69- 72 ,(1993) , 10.1016/0304-8853(93)91289-J
Yasuo Tateno, Interparticle interactions in perpendicularly and longitudinally oriented Ba-ferrite particulate media Journal of Applied Physics. ,vol. 91, pp. 4418- 4420 ,(2002) , 10.1063/1.1453491
M. Radwan, M.M. Rashad, M.M. Hessien, Synthesis and characterization of barium hexaferrite nanoparticles Journal of Materials Processing Technology. ,vol. 181, pp. 106- 109 ,(2007) , 10.1016/J.JMATPROTEC.2006.03.015
C. Sudakar, G.N. Subbanna, T.R.N. Kutty, Wet chemical synthesis of multicomponent hexaferrites by gel-to-crystallite conversion and their magnetic properties Journal of Magnetism and Magnetic Materials. ,vol. 263, pp. 253- 268 ,(2003) , 10.1016/S0304-8853(02)01572-X
T. Mousavand, S. Ohara, M. Umetsu, J. Zhang, S. Takami, T. Naka, T. Adschiri, Hydrothermal synthesis and in situ surface modification of boehmite nanoparticles in supercritical water Journal of Supercritical Fluids. ,vol. 40, pp. 397- 401 ,(2007) , 10.1016/J.SUPFLU.2006.07.021
T. Fujiwara, Barium ferrite media for perpendicular recording IEEE Transactions on Magnetics. ,vol. 21, pp. 1480- 1485 ,(1985) , 10.1109/TMAG.1985.1064091
Jianguo Huang, Hanrui Zhuang, WenLan Li, Synthesis and characterization of nano crystalline BaFe12O19 powders by low temperature combustion Materials Research Bulletin. ,vol. 38, pp. 149- 159 ,(2003) , 10.1016/S0025-5408(02)00979-0
T González-Carreño, M.P Morales, C.J Serna, Barium ferrite nanoparticles prepared directly by aerosol pyrolysis Materials Letters. ,vol. 43, pp. 97- 101 ,(2000) , 10.1016/S0167-577X(99)00238-4