摘要
NiMn-MOF was prepared via one-step hydrothermal method,and then Ni/MnO/C composites were synthesized by high-temperature pyrolysis.The findings indicate that the sample acquired at the pyrolysis temperature of 700℃ demonstrate superior microwave absorption capabilities.The minimum reflection value achieves-19.2 dB at a thickness of 1.4mm,and the effective absorption bandwidth extends to 5.04 GHz at a mere 1.6mm.The exceptional microwave absorption proficiency can be ascribed to the multiple reflections and scattering generated by the material’s unique porous spherical structure,optimized impedance matching,suitable conduction loss,rich interfacial and dipole polarization,and magnetic loss.This study presents a straightforward procedural technique for the fabrication of effective composite absorbers.
基金
financially supported by the National Natural Science Foundation of China(Nos.20904019,51273089,52173267)
the Aviation Science Foundation of China(No.2017ZF56020)
the First Training-class High-end Talents Projects of Science and Technology Innovation in Jiangxi Province(No.CK202002473).
