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二次加热法制备单分散性CoFe2O4纳米晶及其磁性研究 被引量:2

Preparation and Magnetic Properties of Monodisperse CoFe_2O_4 Nanocrystals
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摘要 本文分别以CoCl2.6H2O,FeCl3.6H2O,NaOH为原料,利用N(CH3)4OH(四甲基氢氧化铵)作为改性剂,对CoFe2O4纳米颗粒进行原位表面改性,采用二次加热法,制备单分散性CoFe2O4纳米晶。利用透射电子显微镜(TEM)、X射线衍射仪(XRD)、能量散射分析仪(EDS)和振动样品磁强计等测试手段对样品的形貌,粒径,结构,以及磁学性能等进行了表征。结果表明,单分散性CoFe2O4纳米晶仍具有较大的饱和磁化强度和矫顽力。 Using CoC12· 6H2O, FeCl3·6H2O and NaOH as reactive materials, tetramethylammonium hydroxide (N (CH3 )4OH) as dispersant, monodisperse CoFe204 nanocrystals was synthesized successfully by two-steps heated codeposition method. The phase structures, morphologies, particle sizes, chemical composition, and magnetic properties of CoFe2O4 nanoparticles have been characterized by X-ray diffraction ( XRD), energy-dispersive spectroscopy ( EDS), transmission electron microscope (TEM) and vibrating sample magnetometer (VSM). The results indicate that the monodisperse CoFe2O4 nanocrystals have better saturation magnetization value and coercivity value.
出处 《人工晶体学报》 EI CAS CSCD 北大核心 2008年第1期170-173,178,共5页 Journal of Synthetic Crystals
基金 国家重点基础研究发展计划(973计划)(2005CB724400)
关键词 单分散性 COFE2O4 纳米晶 磁性 monodisperse CoFe2O4 nanocrystals magnetic properties
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