Abstract
Polypyrrole/Ni0.5Zn0.5Fe2O4 (PPy/NiZn ferrite) nanocomposites are prepared using the in-situ chemical oxidative polymerization method of pyrrole in the presence of the ferrite. The composites are characterized using scanning and transmission electron microscopies, vibrating sample magnetometry, thermal gravimetric analysis, X-ray diffractometry, Fourier transform infrared spectroscopy and UV–visible spectroscopy. The microwave absorption characteristics are performed by measuring the reflection loss in the X-band. The results indicate the presence of a maximum reflection loss of − 30.0 dB at 10.9 GHz with a matching thickness of 3.0 mm and a bandwidth of 3.6 GHz for a weight ratio PPy/NiZn ferrite of 2:1 and a loading not exceeding 7.5% w/w of nanocomposite in a host matrix of paraffin wax. The surface density of the absorber is only 2.74 kg/m2. The role of interfacial polarization in promoting microwave absorption characteristics is also highlighted.
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