摘要
采用原位生长法,以钛氧有机化合物为前驱物低温液相在磁性Fe3O4的表面直接形成纳米TiO2,制得Fe3O4/TiO2纳米磁性复合体,利用XRD、SEM、DLS、XPS和PPMS(磁性材料综合物性测量系统)对样品的结构和性能进行表征,并讨论Ti-O-Fe键的形成机理。结果表明:Fe3O4表面被锐钛型的TiO2包覆,且包覆效果良好。该磁性复合体颗粒分布均匀,平均粒径为59nm,饱和磁化强度为3.2emu/g,矫顽力为21Oe。
A magnetic nanosized Fe^O4/TiO2 composite was prepared by in-situ synthesis. The nanosized TiO2 was formed directly onto the surface of magnetic iron oxide using titanyl organic compound as precursor in a low temperature liquid phase. The composition and property of the sample were characterized by XRD, SEM, DLS, XPS and PPMS. The formation mechanism of Ti-O-Fe bonds was discussed. The results exhibited that nanosized TiO2 showed a good cladding effect to magnetic iron oxide. The as-prepared composites were spherical particles with average particle size of 59 nm and good monodispersity. Its saturation magnetization was 3.2 emu/g and the coercivity was 21 Oe.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2013年第2期199-203,286,共6页
Journal of Materials Science and Engineering
基金
广东省部产学研结合专项资金资助项目(2007A090302069)
