| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1504352 | Solid State Sciences | 2014 | 7 Pages |
•The influence of PANI on the structure of SrSm0.3Fe11.7O19 is discussed.•The coating PANI reduced the magnetic properties of SrSm0.3Fe11.7O19.•The coating PANI enhanced microwave absorption property of SrSm0.3Fe11.7O19.•PANI/SrSm0.3Fe11.7O19 had maximum reflection loss of −24 dB.
Sm-doped strontium ferrite nanopowders (SrSm0.3Fe11.7O19) and their composites of polyaniline (PANI)/SrSm0.3Fe11.7O19 with 10 wt% and 20 wt% ferrite were prepared by a sol–gel method and an in-situ polymerization process, respectively. The structure, magnetic properties and microwave absorption properties of the samples were characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectra (FT-IR), transmission electron microscope (TEM), vibrating sample magnetometer (VSM) and vector network analyzer, respectively. The particle size of SrSm0.3Fe11.7O19 was about 35 nm by using XRD. The ferrite successfully packed by PANI. PANI/SrSm0.3Fe11.7O19 possessed the best absorption property with the optimum matching thickness of 3 mm in the frequency of 2–18 GHz. The value of the maximum reflection loss (RL) were −26.0 dB at 14.2 GHz with the 6.5 GHz bandwidth and −24.0 dB at 13.8 GHz with the 7.9 GHz bandwidth for the samples with 10 wt% and 20 wt% ferrite, respectively.
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