Lightweight spongy bone-like graphene@SiC aerogel composites for high-performance microwave absorption
Lightweight spongy bone-like graphene@SiC aerogel composites for high-performance microwave absorption
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DOI：
10.1016/j.cej.2017.12.131
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发表时间：
2018-04-01
影响因子：
15.1
通讯作者：
Sui, Guo-Xin
中科院分区：
文献类型：
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作者：
Jiang, Yue;Chen, Yu;Sui, Guo-Xin
采用石墨烯氧化物（GO）包覆碳化硅（SiC）晶须浆料，通过定向冷冻成型和热还原制备GO@SiC气凝胶，制备了轻质海绵状骨状石墨烯@SiC气凝胶。石墨烯包裹SiC晶须形成了石墨烯@SiC气凝胶独特的分级有序结构，这种结构具有气凝胶密度低（72 mg/cm（3））、吸波性能好等优点。在10.52 GHz频率下，厚度为3 mm的典型样品的最小反射损耗为-47.3 dB，反射损耗的有效带宽为10.52 dB，
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/cm(3)) 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