以Co(NO3)2·6H2O,Fe(NO3)3·9H2O,NaOH为原料,在不同外加磁场条件下进行水热处理,分别制备了颗粒尺寸为几纳米到20 nm的CoFe2O4纳米颗粒,通过XRD,TEM和振动样品磁强计对其晶体形貌和宏观磁性能进行表征.结果表明,采用水热法制备的CoFe2O4可获得纯度较高晶粒生长完整的CoFe2O4磁性纳米微粒,稳恒磁场条件对晶格常数,磁性能有较大的影响.当稳恒磁场在一定范围内时,随着稳恒磁场的增加,磁性颗粒的粒径增大,样品室温下的饱和磁化强度逐渐增大.但是当稳恒磁场超出一定范围时,随着稳恒磁场的减小,磁性颗粒的粒径减小,样品室温下的饱和磁化强度逐渐减小.
参考文献
| [1] | Shouheng Sun;Hao Zeng;David B. Robinson;Simone Raoux;Philip M. Rice;Shan X. Wang;Guanxiong Li .Monodisperse MFe_2O_4 (M = Fe, Co, Mn) Nanoparticles[J].Journal of the American Chemical Society,2004(1):273-279. |
| [2] | Qing Song;Z.John Zhang .Shape Control and Associated Magnetic Properties of Spinel Cobalt Ferrite Nanocrystals[J].Journal of the American Chemical Society,2004(19):6164-6168. |
| [3] | P. Tartaj;M. P. Morales;T. Gonzalez-Carreno .Advances in magnetic nanoparticles for biotechnology applications[J].Journal of Magnetism and Magnetic Materials,2005(1):28-34. |
| [4] | Wenru Zhao;Jinlou Gu;Lingxia Zhang;Hangrong Chen;Jianlin Shi .Fabrication of Uniform Magnetic Nanocomposite Spheres with a Magnetic Core/Mesoporous Silica Shell Structure[J].Journal of the American Chemical Society,2005(25):8916-8917. |
| [5] | Caruso F.;Susha A.;Giersig M.;Caruso RA.;Spasova M. .Magnetic nanocomposite particles and hollow spheres constructed by a sequential layering approach[J].Chemistry of Materials,2001(1):109-116. |
| [6] | Taeghwan Hyeon .Chemical synthesis of magnetic nanoparticles[J].Chemical communications,2003(8):927-934. |
| [7] | Shu-Hong Yu;Masahiro Yoshimura .Ferrite/Metal Composites Fabricated by Soft Solution Processing[J].Advanced functional materials,2002(1):9-14. |
| [8] | Veverka M;Veverka P;Kaman O;Lancok A;Zaveta K;Pollert E;Knizek K;Bohacek J;Benes M;Kaspar P .Magnetic heating by cobalt ferrite nanoparticles[J].Nanotechnology,2007(34):45704-1-45704-7-0. |
| [9] | Tal Meron;Yuri Rosenberg;Yossi Lereah .Synthesis and assembly of high-quality cobalt ferrite nanocrystals prepared by a modified sol-gel technique[J].Journal of Magnetism and Magnetic Materials,2005(0):11-16. |
| [10] | Ji GB;Tang SL;Ren SK;Zhang FM;Gu BX;Du YW .Simplified synthesis of single-crystalline magnetic CoFe2O4 nanorods by a surfactant-assisted hydrothermal process[J].Journal of Crystal Growth,2004(1/2):156-161. |
| [11] | N. Millot;S. Le Gallet;D. Aymes .Spark plasma sintering of cobalt ferrite nanopowders prepared by coprecipitation and hydrothermal synthesis[J].Journal of the European Ceramic Society,2007(2/3):921-926. |
| [12] | Kim YI.;Kim D.;Lee CS. .Synthesis and characterization of CoFe2O4 magnetic nanoparticles prepared by temperature-controlled coprecipitation method[J].Physica, B. Condensed Matter,2003(1/4):42-51. |
| [13] | Lee JG.;Kim CS.;Park JY. .Growth of ultra-fine cobalt ferrite particles by a sol-gel method and their magnetic properties[J].Journal of Materials Science,1998(15):3965-3968. |
| [14] | 徐斌,钟云波,傅小明,任忠鸣.稳恒磁场下水热法制备钡铁氧体[J].高等学校化学学报,2011(01):16-22. |
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