Microwave absorption characteristics of polyaniline@Ba0.5Sr0.5Fe12O19@MWCNTs nanocomposite in X-band frequency

In this research, [email protected]0.5Sr0.5Fe12O19@MWCNTs nanocomposite was prepared via co-precipitation and in-situ polymerization methods, respectively. Microstructural, magnetic and electromagnetic wave absorption analysis of the prepared nanocomposite were studied via XRD, FESEM, VSM and VNA. Compared with Ba0.5Sr0.5Fe12O19@MWCNTs, the microwave absorption bandwidth of the coated nanocompoite with polyaniline was significantly enhanced, which increased to approxiamately 4 GHz from 3 GHz. The effective microwave absorption performance of the Ba0.5Sr0.5Fe12O19@MWCNTs nanocomposite was attributed to increase in the interfacial polarization, improvement in impedance matching as well as porous geometric structure. Specially, by tuning the dielectric and magnetic properties of absorber components, the microwave absorption characteristics can be optimized for broad frequency range. As a consequence, it is concluded that the prepared ternary nanocomposite could be used as lightweight, broadband microwave absorber.