Abstract
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.
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This work was supported by the National Natural Science Foundation of China (Grant 51477002).
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Xing, H., Shen, Z., Wang, L. et al. Synthesis α-Fe2O3/SnO2@PANI ternary composites for X-band electromagnetic wave absorption. J Mater Sci: Mater Electron 28, 8329–8338 (2017). https://doi.org/10.1007/s10854-017-6548-8
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DOI: https://doi.org/10.1007/s10854-017-6548-8