▎ 摘　　要

Fe3O4-reduced graphene oxide-polyaniline (Fe3O4-RGO-PANI) ternary electromagnetic wave absorbing materials were prepared by in situ polymerization of aniline monomer on the surface of Fe3O4-RGO nanocomposites. The morphology, structure and other physical properties of the nanocomposites were characterized by X-ray diffraction, transmission electron microscopy, vibration sample magnetism, etc. The electromagnetic wave absorbing properties of composite materials were measured by using a vector network analyzer. The PANI-Fe3O4-RGO nanocomposites demonstrated that the maximum reflection loss was -36.5 dB at 7.4 GHz with a thickness of 4.5 mm and the absorption bandwidth with the reflection loss below -10 dB was up to 12.0 GHz with a thickness in the range of 2.5-5.0 mm, suggesting that the microwave absorption properties and the absorption bandwidth were greatly enhanced by coating with polyaniline (PANI). The strong absorption characteristics of PANI-Fe3O4-RGO ternary composites indicated their potential application as the electromagnetic wave absorbing material.