Journal
ACS APPLIED ELECTRONIC MATERIALS
Volume 2, Issue 6, Pages 1505-1513Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaelm.0c00090
Keywords
dual-interfacial polarization; silicon carbide; nanofibers; dielectric properties; microwave absorption
Funding
- National Natural Science Foundation of China [51702161, 11975124, 51808551, 61801511]
- Natural Science Foundation of Jiangsu Province [BK20170754, BK20180580]
- Fundamental Research Funds for the Central University [AE89926]
- China Scholarship Council (CSC)
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To improve the microwave absorption (MA) performance of SiC nanofibers, dual interfaces were designed on the surfaces of SiC nanofibers to form SiC@C@PPy heterostructures. The inner carbon and outer polypyrrole (PPy) layers were synthesized through gas etching and oxidative polymerization, respectively. Benefitting from polarization enhancement in dual interfaces and the well-established conductive networks in the composite, SiC@C@PPy nanofiber-loaded composites reveal ideal electromagnetic attenuation and impedance matching properties. The best effective absorption bandwidth (EAB) of SiC@C@PPy nanofibers can reach 8.4 GHz at a thickness of 2.78 mm with a filler loading of 15 wt %. Moreover, by modulating the thickness of the samples, the EAB can cover the whole X (8-12 GHz) and Ku (12-18 GHz) bands.
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