Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10629248 | Journal of the European Ceramic Society | 2016 | 9 Pages |
Abstract
A high-performance electromagnetic wave absorbing composite based on graphene and polysiloxane-derived SiOC ceramic is realized via the polymer pyrolysis process. Hierarchical architecture consisting of two-dimensional graphene and one-dimensional SiC nanowire in ceramic matrix is achieved owing to the heterogeneous nucleation of SiC nanowires promoted by graphene at lower temperature. The dielectric and microwave absorption properties of the composites were studied at 293-673Â K. When graphene oxide loading is 3Â wt%, the composite attains a minimum reflection loss value of â69.3Â dB at 10.55Â GHz with a thickness of 2.35Â mm. With the increase of temperature, the composite exhibits better absorbing performance that the effective absorption bandwidth reaches 3.9Â GHz at 673Â K. The hierarchical networks with graphene/SiC nanowires achieved in SiOC matrix provide a feasible process for the realization of efficient electromagnetic wave absorption in ceramic-based composites at high temperature.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Meikang Han, Xiaowei Yin, Wenyan Duan, Sa Ren, Litong Zhang, Laifei Cheng,