Preparation and Characterization of HGM-Ni0.5Co0.5Fe2O4 Core-shell Particles by Homogeneous Coprecipitation
HGM-Ni0.5Co0.5Fe2O4 core-shell particles were prepared by plating Ni0.5Co0.5Fe2O4 magnetic film on hollow glass microsphere (HGM) from the aqueous solution containing NiCl2·6H2O,FeCl2·4H2O,CoCl2·6H2O and HGMs without sintering.Urea was used as precipitator,and air was used as oxidizer in homogeneous coprecipitation process.The morphologies,phase structures,shell thickness,chemical compositions and magnetic performances of the core-shell particles were characterized by scanning electron microscopy (SEM),X-ray diffraction (XRD),energy dispersive X-ray spectroscopy (EDS) and vibrating sample magnetometer (VSM),respectively.The results showed that a compact and continuous film with thickness at about 250 nm was coated on the HGM by the homogeneous coprecipitation process.The film was spinel ferrite phase,and was determined as the Ni0.5Co0.5Fe2O4.The saturation magnetization (Ms) and the coercivity (Hc) of as-synthesized HGM-Ni0.5Co0.5Fe2O4 core-shell particles were 20.886emu/g and 97.174G,respectively.
Homogeneous co-precipitation HGM-Ni0.5Co0.5Fe2O4 Core-shell particles Magnetism
Mei Yu Jingzhi Hu Jianhua Liu Songmei Li
School of Materials Science and Engineering, Beihang University, Beijing 100191, China
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
293-297
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）