Publication Date:
2019
Description:
Abstract
A kind of glucose‐derived carbon‐rich silicon oxycarbide (glucose‐SiOC) nanocomposite with excellent electromagnetic wave absorbing performance is obtained via solvothermal method, and then pyrolyzed at high temperature (1300°C and 1400°C) under argon atmosphere. The structural evolutions and the electromagnetic wave absorbing capabilities of the nanocomposites have been systematically investigated. The resultant 3 mol/L glucose‐SiOC ceramic exhibits a heterostructure, in which nanosized glucose‐derived carbon and SiC particles decorate on amorphous SiOC network. Benefitting from the nanosized carbon, SiC particles and the heterostructure attributes, the 3 mol/L glucose‐SiOC ceramic displays a strong electromagnetic wave‐absorbing property. The minimum reflection coefficient of the 3 mol/L glucose‐SiOC ceramic pyrolyzed at 1400°C reaches −27.6 dB at 13.8 GHz. The widest effective absorption bandwidth attains 3.5 GHz in Kμ‐band. This work opens up a novel and simple route to fabricate polymer‐derived ceramics with excellent electromagnetic wave‐absorbing performance.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
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