Electrospun Synthesis of Reduced Graphene Oxide (RGO)/NiZn Ferrite Nanocomposites for Excellent Microwave Absorption Properties

摘要

In this work, NiZn ferrite nanofibers were fabricated via electrospinning technique, followed by physical conversion into reduced graphene oxide (RGO)/NiZn ferrite nanocomposites. The whole graphene nanosheets were uniformly decorated with these magnetic nanocrystals without aggregation. The obtained ternary composite was characterized by various instruments for the chemical composition and microstructure. The results show that RGO/NiZn ferrite nanocomposites have remarkable improvements in both permittivity and permeability, which can be attributed to the combination of the good conductivity of light-weight graphene and high magnetocrystalline anisotropy of NiZn ferrites, thus significantly improving microwave absorption properties. With a matching thickness of only 2.0mm, the reflection loss of superior sample of RGO/Ni0.7Zn0.3Fe2O4 hybrid can reach -37.71dB at 12.5GHz, and a reflection loss exceeding 10dB absorption bandwidth can achieve 3.68GHz. This indicates that the RGO/NiZn ferrite composite is an excellent and promising microwave absorbent with good absorption property, thin thickness, and wide absorption bandwidth.