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- W2791158779 abstract "High-performance electromagnetic (EM) absorbing property and excellent thermostability of three-dimensional (3D) hierarchical carbon foams (CFs) modified with in-situ formation of Si3N4 and SiC were herein fabricated for the first time. The crystallinity of the carbon films could be tunable from amorphous carbon to graphite-shape carbon nanosheet by heat treatment of the as-received hybrid foams. Compared with those of pristine CFs, the multiscale hybrid CFs with in-situ formation of Si3N4 and SiC could achieve stronger EM microwave absorption performance with a minimum reflection loss (RL) value of − 43.2 dB at 4.7 GHz at 5.0 mm, and the maximum effective absorption bandwidth (EAB) could be up to 4 GHz (11.8–15.8 GHz) at a thickness of 2.0 mm. The absorption mechanism of the hybrid foams is discussed in detail from the point of the structure and composition transformation, of interfacial polarization and multiple reflections effects and of polarization relaxation effects. The hybrid foams could be thermostable in air atmosphere beyond 1000 °C with above 93% weight retentions, suggesting that the multiscale hybrid CFs could be used as promising absorber materials with strong EM wave absorption performance in harsh environments." @default.
- W2791158779 created "2018-03-29" @default.
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- W2791158779 date "2018-04-01" @default.
- W2791158779 modified "2023-10-16" @default.
- W2791158779 title "Carbon foams modified with in-situ formation of Si3N4 and SiC for enhanced electromagnetic microwave absorption property and thermostability" @default.
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- W2791158779 doi "https://doi.org/10.1016/j.ceramint.2018.01.156" @default.
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