Abstract
In this study, nanocomposites with microwave absorption capability were synthesized based on cobalt-based MOF/SrFe10CoTiO19/carbon nanofibers. The microstructural, morphological, and magnetic characteristics were examined via X-ray diffraction, field emission scanning electron microscopy, and vibrating sample magnetometer, respectively. The microwave absorption properties of single-layer microwave absorbers were examined in the ku-band frequency range of 12.5–18 GHz. For the single-layer absorbers, the absorption characteristic of nanocomposite of all components is more efficient than that of sample containing just only cobalt-based MOF or doped strontium hexaferrite nanoparticles. The composite containing 70 wt.% cobalt-based MOF, 29 wt.% doped strontium hexaferrite, and 1 wt.% carbon nanofibers nanocomposite reached − 19 dB with 3.9 GHz bandwidth in the range of ku-band with the thicknesses of only 2.5 mm. The addition of carbon nanofibers (CNFs) has increased the interfacial polarization, while dipole polarization enhanced due to interactions between CNFs and Co/C. Capacitor-like structures will be formed due to the dielectric difference between components and so on generates great space-charge polarization. Enhanced in these parameters may be linked to increase in the magnetic and dielectric losses and increase the microwave absorption characteristic. Cobalt-based MOF/SrFe10CoTiO19/carbon nanofiber nanocomposite can be used as a potential candidate for microwave absorbers with strong absorption capability.
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Zheng, X., Li, Y. & Fun, X. Design of Efficient Microwave Absorbers Based on Cobalt-Based MOF/SrFe10CoTiO19/Carbon Nanofibers Nanocomposite. J Supercond Nov Magn 33, 2745–2751 (2020). https://doi.org/10.1007/s10948-020-05499-x
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DOI: https://doi.org/10.1007/s10948-020-05499-x