Synthesis α-Fe2O3/SnO2@PANI ternary composites for X-band electromagnetic wave absorption
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α-Fe2O3/SnO2@polyaniline composites were prepared by combining a hydrothermal reaction and an emulsion polymerization process. The sizes of α-Fe2O3 and SnO2 particles dispersed into PANI were 80–120 and 8 nm, respectively. The structure, morphology, and electromagnetic (EM) parameters were characterized by using X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, and vector network analysis. To achieve the absorption of different EM bands, the EM wave absorption properties of α-Fe2O3/SnO2@PANI composites with different stannic oxide content were investigated according to transmission line theory. Polarizations and multiple reflections in the composite absorber play a key role in EM wave absorption. The α-Fe2O3/SnO2@PANI composites exhibited high EM absorption capacity and an optimal reflection loss of −50.3 dB at 9.9 GHz with thickness of 2.7 mm. Moreover, the composite could reach an effective absorption bandwidth (below −10 dB) from 7.84 to 12.08 GHz. Thus, the synthesized composites are suitable candidates for highly efficient EM wave absorption in the entire X-band.
KeywordsSnO2 PANI Reflection Loss Absorber Thickness Ternary Composite
This work was supported by the National Natural Science Foundation of China (Grant 51477002).
Compliance with ethical standards
Conflict of interest
The authors declare no competing financial interest.
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