Single-source-precursor derived SiOC ceramics with <i>in-situ</i> formed CNTs and core–shell structured CoSi@C nanoparticles towards excellent electromagnetic wave absorption properties

In this work, novel CNTs/CoSi/SiOC nanocomposite ceramics with in-situ formed multi-walled carbon nanotubes (CNTs) and core-shell structured CoSi@C nanoparticles were successfully prepared via a single-source-precursor derived ceramic approach. The polymeric precursor characterization as well phase evolution, microstructure electromagnetic wave (EMW) absorption properties of the was investigated in detail. results show that in-situ formed CNTs magnetic provide synergistic effect on both dielectric loss loss, leading to outstanding EMW annealed at only 1100 °C, follows: 1) For Co feeding 6.25 wt.%, minimum reflection (RLmin) is -53.1 dB effective bandwidth (EAB) 4.96 GHz (7.12-12.08 GHz) with ceramic-paraffin hybrid sample thickness 3.10 mm, achieving full X-band coverage; 2) 9.09 RLmin value -66.4 EAB 3.04 (8.4-11.44 achieved 2.27 mm. Therefore, present have potential applications for thin, lightweight efficient harsh environments.