Lightweight spongy bone-like graphene@SiC aerogel composites for high-performance microwave absorption

Document Type

Journal Article

Publication Title

Chemical Engineering Journal

Publisher

Elsevier BV

School

School of Engineering

Comments

Jiang, Y., Chen, Y., Liu, Y. -., & Sui, G. -. (2018). Lightweight spongy bone-like graphene@SiC aerogel composites for high-performance microwave absorption. Chemical Engineering Journal, 337, 522-531. Available here

Abstract

Lightweight spongy bone-like graphene@silicon carbide (SiC) aerogels were fabricated by the directional freeze-casting of graphene oxide (GO) coated SiC whiskers slurry and thermal reduction of GO@SiC aerogels. The unique hierarchically ordered structure of graphene@SiC aerogels is formed by graphene wrapped SiC whiskers, such a structure possess great advantages such as low density (72 mg/cm3) and high microwave absorption performance for aerogels. The minimum reflection loss of typical sample achieves −47.3 dB at 10.52 GHz with a thickness of 3 mm, and the effective bandwidth of reflection loss ≤ −10 dB can reach 4.7 GHz. These results indicate that the novel graphene@SiC aerogels is an optimal material for high-performance microwave absorption application in aeronautics.

DOI

10.1016/j.cej.2017.12.131

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