The microwave absorption performance of ZnFe2O4/C composites synthesized by high-temperature mechanochemical technology with graphite intercalation compounds

Constructing the magnetic/dielectric synergistic effect between ferrite and carbon materials is an important strategy to obtain microwave absorbers. ZnFe₂O₄ and graphite intercalation compounds (GICs) are creatively combined by high-temperature mechanochemical technology. The results show that ZnFe₂O₄ is attached to the surface and pores of graphite with special three-dimensional structure, the propagation path of microwaves in the composites can be extended, and polarization effects and magnetic loss of ZnFe₂O₄/C composites can be effectively enhanced. When the addition amounts of GICs is 10 wt%, the reflection loss (RL) of ZnFe₂O₄/C composite reaches −41.49 dB at a thickness of 4.5 mm, and the effective absorption bandwidth (EAB) reaches 3.92 GHz at a thickness of only 1.5 mm. This work provides a new idea for the synthesis of ZnFe₂O₄/C microwave absorbers agent by high-temperature mechanochemical technology.