A simple solvothermal method was used to fabricate CoFe₂O₄-graphene nanoplatelets (CFO-GnPS). X-ray Powder Diffraction (XRD) pattern, RAMAN spectra and Fourier-transform infrared spectroscopy (FTIR) spectra confirmed the pure-phase of CFO-GnPS nanocomposite. FESEM and TEM micrographs revealed the graphene platelets had a flaky structure with adequate wrinkles, decorated with CFO nanoparticles with average size 34 nm. The dielectric constant for CFO nanoparticles was 8.3 E6 which when blended with GnPs increased massively to 2.3 E8 for frequency of 100 Hz to 1 MHz from 30 °C to 300 °C. Present work is focussed to reduce the eddy current loss in the material so as to exploit it in the field of high frequency based devices. Frequency dependence complex permittivit study indicates a significant improvement in the complex permittivity of CFO–GnPs nanocomposite leading to a reduction in Eddy loss which favours the material to be used in multifunctional camouflage coatings and high-frequency operations. Magnetization measurement divulges CFO-GnPs possess ferrimagnetism behaviour exhibiting a promising prospect in high frequency devices.

一种简单的溶剂热法用于制备CoFe ₂ O ₄-石墨烯纳米血小板（CFO-GnPS）。X射线粉末衍射（XRD）图谱，RAMAN光谱和傅立叶变换红外光谱（FTIR）光谱证实了CFO-GnPS纳米复合材料的纯相。FESEM和TEM显微照片显示，石墨烯薄片具有片状结构，具有足够的皱纹，并用平均大小为34 nm的CFO纳米粒子装饰。CFO纳米粒子的介电常数为8.3 E6，当与GnPs混合时，频率从30°C到300°C，频率从100 Hz到1 MHz时，介电常数大幅提高到2.3 E8。当前的工作集中在减少材料中的涡流损耗上，以便在基于高频的器件领域中加以利用。频率依赖性复介电常数研究表明，CFO-GnPs纳米复合材料的复介电常数显着提高，导致涡流损耗减少，这有利于在多功能伪装涂料和高频操作中使用该材料。磁化测量泄漏CFO-GnP具有亚铁磁性，在高频设备中显示出广阔的前景。