Preparation and Characterization of BaTiO3-NixZn1-xFe2O4 Core-shell Particles by Homogeneous Coprecipitation

doi:10.3969/j.issn.0251-0790.2012.07.005

Abstract

Abstract: BaTiO₃-Ni_xZn_1-xFe₂O₄ core-shell particles were prepared by plating Ni_xZn_1-xFe₂O₄ magnetic films on BaTiO₃ via homogeneous coprecipitation with urea as the precipitator. The phase structure, morphology, particle size, shell thickness, chemical composition and magnetic performance of the core-shell particles were characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM), energy dispersive X-ray spectroscopy(EDS) and vibrating sample magnetometer(VSM), respectively. The results show that compact and continuous coatings of Ni_xZn_1-xFe₂O₄ are formed on the surface of the BaTiO₃. The magnetic performance of BaTiO₃-Ni_xZn_1-xFe₂O₄ core-shell particles could be controlled via regulating the molar ratio of NiCl₂·6H₂O to ZnCl₂ added in the experiment. When the molar ratio of NiCl₂·6H₂O to ZnCl₂ is 7∶3, the saturation magnetization(M_s) and the coercivity(H_c) of the as-sample are 26.999 A·m²/kg and 902.787 A/m, respectively.

Key words: Homogeneous coprecipitation, BaTiO₃-Ni_xZn_1-xFe₂O₄, Core-shell particles, Magnetic performance

CLC Number:

O614

TrendMD:

YU Mei, HU Jing-Zhi, LIU Jian-Hua, LI Song-Mei. Preparation and Characterization of BaTiO₃-Ni_xZn_1-xFe₂O₄ Core-shell Particles by Homogeneous Coprecipitation[J]. Chem. J. Chinese Universities, 2012, 33(07): 1389.

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Preparation and Characterization of BaTiO₃-Ni_xZn_1-xFe₂O₄ Core-shell Particles by Homogeneous Coprecipitation

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