采用超声溶剂热法，成功地制备了由片状钴铁氧体（CoFe2O4）自组装的微球。采用 X 射线衍射仪（XRD）、扫描电子显微镜（SEM）对样品的结构和形貌进行了表征。结果表明，所制备的 CoFe2O4微球为立方晶相结构，其粒径分布在20～30μm之间，是由二维纳米片组装而成。用振动样品磁强计（VSM）和网络矢量分析仪分别对纳米片组装微球样品及自制的 CoFe2O4粉体的室温磁性和吸波性能进行了测试，结果显示，纳米片组装微球比自制粉体的磁性和微波吸收性能更好，其饱和磁化强度和矫顽力分别达到76.15emu/g 和227.89Oe。此外，纳米片组装 CoFe2O4微球在频率为6000MHz 波段附近有一个明显的吸收峰，回损值大于−18dB，并有继续增大的趋势。说明产物的结构和形貌对其磁性和吸波性都有很大影响。%Assembled nano-flake CoFe2O4 microspheres were synthesized by using the ultrasonic solvothermal method. The microstructure and morphology of the samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The prepared CoFe2O4 microspheres assembled by two-dimensional sheet were cubic structure with particle size about 20—30μm. The magnetic properties and microwave absorbing properties of the flake self-assembled CoFe2O4 microspheres and self-made CoFe2O4 powder were characterized by using vibrating sample magnetometer (VSM) and network vector analyzer. The saturation magnetization and coercive force of the flake self-assembled CoFe2O4 microspheres reached 76.15emu/g and 227.89Oe , respectively. In addition , the flake self-assembled CoFe2O4 microspheres had an obvious absorption peak at 6000MHz frequency band,where return loss value was greater than−18 dB and tended to increase. Structure and morphology of the samples had significant impact on their magnetic properties and microwave absorbing properties.
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