SiBCN-reduced graphene oxide (rGO) ceramic composites derived from single-source-precursor with enhanced and tunable microwave absorption performance

SiBCN-reduced graphene oxide (SiBCN-rGO) ceramic composites with different rGO content derived from a single-source precursor were successful synthesized by polymer derived ceramics routes to tune their dielectric properties and electromagnetic wave absorption capacity. SiBCN-rGO ceramic composites with 6 wt% GO annealed at 1300 degrees C possessed the best microwave absorption performance obtaining the minimum reflection coefficient (RCmin) of -62.71 dB at 10.72 GHz, and the thin thickness of 2.17 mm. Adjusting its thickness to 1.58 mm could obtain the maximum effective absorption bandwidth (RC < -10 dB) of 4.32 GHz. The microwave absorption mechanisms of the as-prepared SiBCN-rGO ceramic composites were mainly attributed to the conductive loss and polarization loss induced by the synergistic effects of amorphous SiBCN matrix, rGO and SiC nanocrystals. (C) 2021 Elsevier Ltd. All rights reserved.

Automated summary

SiBCN-reduced graphene oxide (SiBCN-rGO) ceramic composites were successfully synthesized with different rGO content through polymer derived ceramics routes to tune their dielectric properties and electromagnetic wave absorption capacity. The composite with 6 wt% GO annealed at 1300 degrees C exhibited the best microwave absorption performance with a thin thickness of 2.17 mm. The microwave absorption mechanisms were attributed to the conductive loss and polarization loss induced by the synergistic effects of amorphous SiBCN matrix, rGO, and SiC nanocrystals.