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采用共沉淀法制备出尖晶石型 ZnFe2 O4纳米颗粒，通过透射电子显微镜(TEM)、X 射线衍射仪(XRD)、振动样品磁强计(VSM)和矢量网络分析仪分析样品的表面形貌、晶体结构、化学成分、磁化性能和电磁性能。研究结果表明，前驱体混合物的焙烧温度为500℃时得到 ZnFe2 O4纳米颗粒，尺寸在14~17 nm范围内，粒度分布均匀，为单晶立方结构；当焙烧温度为500~800℃时，样品表现出亚铁磁性，随着焙烧温度升高，颗粒尺寸增大，离子的倒反系数减小，饱和磁化强度降低；所选样品在2~18 GHz 频率范围内多次出现损耗峰，介质在松弛极化和色散过程中，将电场能转化为热能而耗散掉，从而获得良好的电磁性能。所用方法工艺简单，设备成本低。

ZnFe2 O4 spinel nanoparticles were synthesized by co-precipitation method.By means of transmission e-lectron microscopy (TEM),X-ray diffraction (XRD),vibrating sample magnetometer (VSM)and vector net-work analyzer,we analyze the surface morphology,crystal structure and chemical composition of the samples, and study its magnetic properties and electromagnetic properties.The research results show that the particles size was in the range of 14-17 nm,uniform grain distribution and single-crystal cubic structure as the calcination temperature of the precursor mixture was 500 ℃.When the calcination temperature was from 500 to 800 ℃, magnetic moment was antiparallel alignment,performance for the ferromagnetic material.With the increase of calcination temperature,the crystallization of samples increased,but the saturation magnetization decreased. The selected sample has repeatedly appeared to the loss peaks in the range of 2-18 GHz,in the process of relax-ation polarization and dispersion of the medium,the electric energy was converted into heat energy and dissipa-ted.This preparation method has many advantages,such as,the simple process,low equipment cost,excellent electromagnetic properties etc.