锌锰镍铁氧体纳米粉体的制备与磁性

Preparation and structure analysis of Mn-Zn-Ni ferrites nano-powder

采用化学共沉淀法制备锌锰镍铁氧体纳米粉体，用X射线衍射仪（XRD）、红外光谱仪（FT-IR）、透射电镜（TEM）和振动样品磁强计（VSM）等表征产物的结构、形貌和磁性能。结果表明：锌锰镍铁氧体的饱和磁化强度随着镍的相对含量（x）的增加呈现先缓慢增大（x=0～0．2）后急剧减小（x=0.2-0．3）然后再增大（x=0．3-0．4）的变化规律，这说明纳米铁氧体的磁性与其微观结构、颗粒尺寸、晶界和结构缺陷等因素有关。

The nano-sized Mn-Zn-Ni ferrites were prepared by co-precipitation method. The structures and ferromagnetic property of ferrite powders and nanocomposites were characterized by means of powder X-ray diffractometry, transmitted electron microscope, and vibrating sample magnetometer techniques, respectively. The results show that the magnetization of the Mn-Zn-Ni ferrites decreases in the beginning, then increases, and again decreases sharply with the increase of relative Ni content, which indicates that there are some factors giving the effect on the magnetic such as the microstructure, the grain size, crystal boundary and so on.