Preparation of polypyrrole/CoxMoyOz composite and its microwave absorption performance
The present work combines polypyrrole with cobalt molybdenum oxide using an in situ surface growth method to adjust impedance matching and explore the microwave absorption performance of the composite material.The complex dielectric constant and magnetic permeability of the samples are meas-ured in the frequency range of 2 to 18 GHz using a vector network analyzer,and their reflection loss(RL)value is investigated.The results show that the obtained PPy/Cox MoyOz composite exhibits excellent ab-sorption performance at 17.68 GHz under a matching thickness of 2.0 mm,with an RLmin of-46.02 dB and an effective absorption bandwidth of 4.08 GHz.The excellent absorption performance can be attribu-ted to the combined effect of multion loss mechanisms,including conduction loss,interface polarization,dipole polarization and eddy current loss.
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