“…1,2,[7][8][9] Of all the critical electromagnetic wave absorption materials, polymer-derived ceramics (PDC), including SiOC, SiBCN, SiCN, and Si 3 N 4 , have captured growing attention due to their controllable microstructure, lightweight, excellent thermomechanical properties, and a wide absorption frequency. 10,12,15 Xue et al 16 developed a Si 3 N 4 -BN-SiCN nanocomposite that manifested excellent absorption properties with the minimum reflection loss of −47.05 dB at the thickness of 4.05 mm. Duan et al reported a series of SiOC ceramic-based nanocomposites modified by nano-SiC, SiC nanowires, or hyperbranched ferrocene, which possessed strong absorption capability and wide absorption bandwidth.…”