Electromagnetic Wave Absorption Properties Of Polymer-Derived Sicn Ceramics Doped With Co3c Particles

SiCN ceramics doped with magnetic particles Co3C were prepared by polymer derivatization. On this basis, the composition and microstructures of SiCN based composite ceramics pyrolyzed at different temperatures were studied. The electromagnetic parameters and the electromagnetic wave absorption performance at 2-18 GHz were analyzed. The results show that there was a minimum reflection loss (R-Lmin) value of -14 dB at 16.5GHz and an effective absorption bandwidth (R-L<-10dB) of 0.6 GHz when the pyrolysis temperature was 1300 degrees C and the sample thickness was 2 mm. This indicates that SiCN ceramics doped with Co3C particles can be a potential candidate in the field of electromagnetic wave absorbing materials.