CAJ | 학술논문

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。
채용초성용제열법，성공지제비료유편상고철양체（CoFe2O4）자조장적미구。채용 X 사선연사의（XRD）、소묘전자현미경（SEM）대양품적결구화형모진행료표정。결과표명，소제비적 CoFe2O4미구위립방정상결구，기립경분포재20～30μm지간，시유이유납미편조장이성。용진동양품자강계（VSM）화망락시량분석의분별대납미편조장미구양품급자제적 CoFe2O4분체적실온자성화흡파성능진행료측시，결과현시，납미편조장미구비자제분체적자성화미파흡수성능경호，기포화자화강도화교완력분별체도76.15emu/g 화227.89Oe。차외，납미편조장 CoFe2O4미구재빈솔위6000MHz 파단부근유일개명현적흡수봉，회손치대우?18dB，병유계속증대적추세。설명산물적결구화형모대기자성화흡파성도유흔대영향。
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.