高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (07): 1389-1393.doi: 10.3969/j.issn.0251-0790.2012.07.005

• 研究论文: 无机化学 • 上一篇    下一篇

均匀共沉淀法制备BaTiO3 -Nix Zn1-x Fe2 O4 核-壳粒子及其性能

于美, 胡竞之, 刘建华, 李松梅   

  1. 北京航空航天大学材料科学与工程学院, 北京 100191
  • 收稿日期:2011-10-10 出版日期:2012-07-10 发布日期:2012-07-10
  • 通讯作者: 于 美, 女, 博士, 副教授, 主要从事微纳米材料制备、 材料腐蚀科学与防护技术等方面的研究. E-mail: yumei@buaa.edu.cn E-mail:yumei@buaa.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 51001007)资助.

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

YU Mei, HU Jing-Zhi, LIU Jian-Hua, LI Song-Mei   

  1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China
  • Received:2011-10-10 Online:2012-07-10 Published:2012-07-10

摘要: 以尿素为沉淀剂, 在无后续热处理的情况下, 采用均匀共沉淀法制备了BaTiO3-NixZn1-xFe2O4核-壳粒子. 采用透射电子显微镜(TEM)、 X射线衍射仪(XRD)、 能谱仪(EDS)及振动样品磁强计(VSM)对BaTiO3-NixZn1-xFe2O4核-壳粒子的形貌、 结构、 成分和磁性能进行了表征. 结果表明, 制备的核-壳结构粒子中NixZn1-xFe2O4壳层在BaTiO3颗粒的表面包覆完整. 通过控制共沉淀中NiCl2·6H2O与ZnCl2的摩尔比可以调控BaTiO3-NixZn1-xFe2O4核-壳粒子的磁性; 加入的NiCl2·6H2O与ZnCl2摩尔比为7∶3时制得的核-壳粒子具有较好的磁性能, 其饱和磁化强度和矫顽力分别为26.999 A·m2/kg和902.787 A/m.

关键词: 均匀共沉淀, BaTiO3-NixZn1-xFe2O4, 核-壳粒子, 磁性能

Abstract: BaTiO3-NixZn1-xFe2O4 core-shell particles were prepared by plating NixZn1-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 NixZn1-xFe2O4 are formed on the surface of the BaTiO3. The magnetic performance of BaTiO3-NixZn1-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(Ms) and the coercivity(Hc) of the as-sample are 26.999 A·m2/kg and 902.787 A/m, respectively.

Key words: Homogeneous coprecipitation, BaTiO3-NixZn1-xFe2O4, Core-shell particles, Magnetic performance

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