Microwave absorption properties of SiC@SiO2@Fe3O4 hybrids in the 2–18 GHz range

• Published in: International journal of minerals, metallurgy and materials Vol. 24; no. 7; pp. 804 - 813
• Main Authors: Zhou, Peng, Chen, Jun-hong, Liu, Meng, Jiang, Peng, Li, Bin, Hou, Xin-mei
• Format: Journal Article
• Language: English
• Published: Beijing University of Science and Technology Beijing 01.07.2017; Springer Nature B.V; National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing, Beijing 100083, China%School of Material Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China%Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
• Subjects: Absorption; Carbon black; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Contact angle; Corrosion and Coatings; Fourier transforms; Frequency ranges; Glass; Hybrids; Iron oxides; Materials Science; Metallic Materials; Microscopy; Microwave absorption; Microwave attenuation; Nanoparticles; Nanowires; Natural Materials; Permeability; Radiation; Silicon carbide; Silicon dioxide; Spectrum analysis; Surfaces and Interfaces; Thickness; Thin Films; Tribology; silicon carbide nanowires; hybrids; mechanism; impedance match; microwave absorption
• ISSN: 1674-4799; 1869-103X; 1869-103X
• DOI: 10.1007/s12613-017-1464-8

To enhance the microwave absorption performance of silicon carbide nanowires（SiCNWs）, SiO2 nanoshells with a thickness of approximately 2 nm and Fe3O4 nanoparticles were grown on the surface of SiCNWs to form SiC@SiO2@Fe3O4 hybrids. The microwave absorption performance of the SiC@SiO2@Fe3O4 hybrids with different thicknesses was investigated in the frequency range from 2 to 18 GHz using a free-space antenna-based system. The results indicate that SiC@SiO2@Fe3O4 hybrids exhibit improved microwave absorption. In particular, in the case of an SiC@SiO2 to iron（III） acetylacetonate mass ratio of 1:3, the microwave absorption with an absorber of 2-mm thickness exhibited a minimum reflection loss of-39.58 d B at 12.24 GHz. With respect to the enhanced microwave absorption mechanism, the Fe3O4 nanoparticles coated on SiC@SiO2 nanowires are proposed to balance the permeability and permittivity of the materials, contributing to the microwave attenuation.