Preparation and Characterization of HGM-Ni0.5Co0.5Fe2O4 Core-Shell Particles by Homogeneous Coprecipitation

Mei Yu; Jing Zhi Hu; Jian Hua Liu; Song Mei Li

doi:10.4028/www.scientific.net/MSF.745-746.293

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HomeMaterials Science ForumMaterials Science Forum Vols. 745-746Preparation and Characterization of...

Preparation and Characterization of HGM-Ni_0.5Co_0.5Fe₂O₄ Core-Shell Particles by Homogeneous Coprecipitation

Abstract:

HGM-Ni_0.5Co_0.5Fe₂O₄ core-shell particles were prepared by plating Ni_0.5Co_0.5Fe₂O₄ 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 Ni_0.5Co_0.5Fe₂O₄. The saturation magnetization (Ms) and the coercivity (Hc) of as-synthesized HGM-Ni_0.5Co_0.5Fe₂O₄ core-shell particles were 20.886emu/g and 97.174G, respectively.

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Materials Science Forum (Volumes 745-746)

Pages:

293-297

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.745-746.293

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Online since:

February 2013

Authors:

Mei Yu, Jing Zhi Hu, Jian Hua Liu, Song Mei Li

Keywords:

Core-Shell Particles, HGM-Ni_0.5Co_0.5Fe₂O₄, Homogeneous Coprecipitation, Magnetism

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