The goal of recycling paper is efficient utilization of cellulose resources. Currently, the most extensive approach for secondary fibers is to recycle as remanufacturing paper. Herein, we report that papers can be used as a carbon template material to synthesize SiC sheet with excellent microwave absorption. The morphology and microstructure of the SiC sheet have been characterized by scanning electron microscope and powder X-ray diffractometer. These characterizations indicate the growth mechanism of SiC sheets is solid phase reaction coexisting with vapor-solid reaction. There are plenty of stacking faults generated in the domain of SiC, which endow SiC sheets with superior electromagnetic (EM) wave absorption. The lowest reflection loss reaches -22 dB. Effective EM absorption band (R<sub>L </sub>&lt; -10 dB) covers the frequency range of 12.8-18 GHz with a thickness of 2.2 mm. Our research provides a novel value-added approach for recycling papers and an excellent EM absorber for industrial application.<br/>

Paper-derived SiC sheet with high-density stacking faults for high-performance electromagnetic wave absorption

2019 Spring National Meeting

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