Synthesis and microwave absorption properties of SiC nanowires reinforced SiOC ceramic

Silicon carbide nanowire (SiC NW)-reinforced SiOC ceramics were fabricated by the in-situ growth of SiC NWs in SiOC ceramics by the pyrolysis of polysiloxane. SiC NWs were formed in situ by the addition of ferrocene and the content of SiC NWs increased with increased annealing temperature and ferroc...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2014-02, Vol.34 (2), p.257-266
Main Authors: Duan, W, Yin, X, Li, Q, Liu, X, Cheng, L, Zhang, L
Format: Article
Language:English
Subjects:
Ceramics
Dielectric constant
Ferrocenes
Nanowires
Noise levels
Permittivity
Silicon carbide
Silicon dioxide
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Summary:Silicon carbide nanowire (SiC NW)-reinforced SiOC ceramics were fabricated by the in-situ growth of SiC NWs in SiOC ceramics by the pyrolysis of polysiloxane. SiC NWs were formed in situ by the addition of ferrocene and the content of SiC NWs increased with increased annealing temperature and ferrocene content. Due to the formation of SiC NWs in the inter-particle pores of the SiOC ceramics, the SiOC particles were bridged by SiC NWs, which led to increased electrical conductivity. For increased SiC NWs content, the real permittivity and the imaginary permittivity increased from 3.63 and 0.14 to 10.72 and 12.17, respectively, and the minimum reflection coefficient decreased from -1.22 dB to -20.01 dB, demonstrating that the SiOC ceramics with SiC NWs had superior microwave-absorbing ability.
ISSN:0955-2219
DOI:10.1016/j.jeurceramsoc.2013.08.029