High-efficient production of SiC/SiO2 core-shell nanowires for effective microwave absorption
KAUST DepartmentAdvanced Membranes and Porous Materials Research Center
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AbstractIn the current report, we have demonstrated that the high-efficient production of SiC/SiO2 core-shell nanowires can be achieved through the introduction of trace of water vapor during the chemical vapor deposition process. The yield of the SiC/SiO2 core-shell nanowires is dramatically improved due to the introduction of water vapor. The SiC/SiO2 core-shell nanowires exhibit an excellent microwave absorption property in the frequency range of 2.0–18.0GHz with a very low weight percentage of 0.50wt.% in the absorbers. A minimum reflection loss value of −32.72dB (>99.99% attenuation) at 13.84GHz has been observed with the absorber thickness of 3.0mm. Moreover, the SiC/SiO2 core-shell nanowires based absorber can reach an effective absorption bandwidth (<−10dB) of 5.32GHz with the absorber thickness of 3.5mm. Furthermore, a possible absorption mechanism is also proposed in detail for such effective attenuation of microwave which can be attributed to the dielectric loss and magnetic loss of SiC/SiO2 core-shell nanowires.
CitationZhong B, Sai T, Xia L, Yu Y, Wen G (2017) High-efficient production of SiC/SiO2 core-shell nanowires for effective microwave absorption. Materials & Design 121: 185–193. Available: http://dx.doi.org/10.1016/j.matdes.2017.02.058.
SponsorsThis work was supported by the National Natural Science Foundation of China (51102060, 51172050, 51302049, 51372052 and 51672059), the China Postdoctoral Science Foundation (2013M531036), and Shangdong Province Young and Middle-Aged Scientists Research Awards Fund (BS2013CL003).
JournalMaterials & Design