CoFe_2O_4/SiO_2纳米复合材料的制备及其磁性

Preparation and Magnetic Properties of CoFe_2O_4/SiO_2 Nano-composites

采用溶胶-凝胶法制备(CoFe2O4)x/(SiO2)1-x纳米复合材料.利用X射线衍射(XRD)和振动样品磁强计(VSM)研究样品结构、晶粒尺寸及磁性.结果表明,随SiO2含量增加,样品的晶粒尺寸减小,比饱和磁化强度和矫顽力降低.

CoFe2O4/SiO2 nano-composites were prepared via the sol-gel method. Structure, grain size and magnetic properties of CoF2O4/SiO2 nano-composites were investigated by X-ray diffraction （XRD） and vibrating sample magnetometer （VSM）. The results show that with the increase of the content of SiO2, the grain size, the saturation magnetization and coercivity of samples decrease.