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本文以二茂铁为主要原料,通过溶剂热法在190℃反应72h制备了核壳型Fe3O4/C磁性纳米颗粒。通过X-射线衍射仪(XRD)、扫描电子显微镜(SEM)、X-射线能谱仪(EDS)、透射电子显微镜(TEM)、振动样品磁强计(VSM)、矢量网络分析仪对产物进行了表征。结果表明,产物为球形核壳结构的Fe3O4/C纳米颗粒,其尺寸在100~150nm之间,其中碳壳的厚度在10~20nm之间。室温下,产物的矫顽力(Hc)为13.635Oe,剩余磁化率(Mr)为5.00725emu/g,饱和磁化率(Ms)为17.6863emu/g。在2~18GHz范围内,产物厚度为5mm、频率为12.99GHz时,产物的微波反射率为-37.85dB。
In this paper, ferrocene as the main raw material, by solvothermal reaction at 190 ℃ for 72h prepared core-shell Fe3O4 / C magnetic nanoparticles. The product was analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), vibrating sample magnetometer (VSM) Characterization. The results show that the product is a Fe3O4 / C nanoparticle with a spherical core-shell structure with a size of 100-150 nm, wherein the thickness of the carbon shell is between 10-20 nm. The coercivity (Hc) of the product was 13.635 Oe at room temperature, the residual magnetic susceptibility (Mr) was 5.00725emu / g and the saturation magnetization (Ms) was 17.6863emu / g. In the range of 2 ~ 18GHz, the product thickness is 5mm, the frequency is 12.99GHz, the microwave reflectance of the product is -37.85dB.