Schematic Diagram (IMAGE)
Caption
A schematic diagram of phase cancellation and microwave attenuation process. The fluffy structure of PANI/Fe ferrite composite can highly increase the transmission path of microwave, and the multiple reflections can enhance the microwave attenuation efficiency of the absorber. Thus, the microwave attenuation capability of PANI/Zn ferrite composites mainly comes from the enhanced effect of fluffy structure, multiple reflections, interfacial polarization, magnetic loss and dielectric loss. Moreover, if the relationship between the coating thickness and the frequency of incident microwaves matched well with the quarter-wave thickness criteria, the incident microwaves would vertically enter the absorber inside, as shown in this figure.
Credit
Honglong Xing
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