Zn2+含量对纳米Ni-Zn铁氧体结构和磁性能的影响

摘要

Nanocrystalline Ni1-xZnxFe204 ferrite with 0≤x≤l. 0, was successfully prepared by spra-ying-coprecipitation method. The microstructure was investigated by using TG-DSC, XRD, TEM. Magnetic properties were measured with vibrating sample magnetometer (VSM) at room temperature. The results show that uniform and fine nanocrystalline Ni1-xZnxFe2O4 ferrite powders are obtained by spraying-coprecipitation method. The grain size is about 30nm calcined at 600°C for 1. 5h. There are a few agglomerates with average sizes below l00nm. Lattice parameters and the specific saturation magnetization of nanocrystalline Ni1-xZnxFe2O4 ferrite increase with the concent of Zn+2 at room temperature, and maximum Ms is 66. 8 A · m2 ·kg-1 as the content of Znz+ is around 0. 5mol.%采用喷射-沉淀法成功地制备了纳米晶Ni1-xZnxFe2O4(0≤x≤1.0)铁氧体粉料.通过TG- DSC,XRD,TEM等测试手段分析了其微观结构和形貌,用振动样品磁强计测量其室温下磁性能.结果表明:喷射-共沉淀法制备的粉料颗粒细小均匀、形状完整.600℃下煅烧1.5h,样品晶粒尺寸为30nm左右,平均颗粒尺寸小于100nm.随着Zn2+含量的增加,Ni-Zn铁氧体的晶胞参数逐渐增大.室温下,样品比饱和磁化强度随Zn2+含量增加而增加,当x=0.5mol时,最大比饱和磁化强度Ms为66.8A·m2 ·kg-1.