RGO/BaFe12O19/Fe3O4 nanocomposite as microwave absorbent with lamellar structures and improved polarization interfaces

Abstract In this paper, we designed and prepared a composite of BaFe 12 O 19 (BFO) flakes, two-dimensional graphene and Fe 3 O 4 nanoparticles using a two-step solvothermal method. The combination of BFO flakes and two-dimensional graphene could effectively enhance the heterointerface and is believed to be favorable to enhance the interface polarization. The introduction of inverse spinel Fe 3 O 4 as the third phase could increase the saturated magnetization. The phase structure, morphology, magnetic properties and electromagnetic wave absorption performance of the as-prepared samples were characterized. Due to the enhanced interfacial polarization between the BaFe 12 O 19 flakes and graphene, the composite of RGO/BaFe 12 O 19 /Fe 3 O 4 exhibits excellent microwave absorption properties. The maximum reflection loss can reach -46.04 dB at 15.6 GHz with a thickness of 1.8 mm, and the effective absorption bandwidth reaches 5.68 GHz (from 11.60 GHz to 17.28 GHz). It is believed that the RGO/BaFe 12 O 19 /Fe 3 O 4 composites can find potential application in the field of microwave absorption due to their excellent absorption properties.