Microwave absorption properties of single-wall carbon nanotubes/barium hexaferrite composite

The Fe-filled single-walled carbon nanotubes(SWCNTs) were fabricated by a DC arc discharge method.After purification process and then doped the very substance into the nanocrystalline M-type barium hexaferrite(BaFe12O19),which was synthesized by a sol-gel auto-combustion method.The electromagnetic parameters of the samples were tested using coaxial method,and microwave absorption properties of SWCNTs/BaFe12O19 composite with different doping ratios were investigated.The results indicate that the magnetic loss of composite SWCNTs/BaFe12O19 is mainly attributed to the natural resonance and exchange resonance.When doping 2% mass fraction of SWCNTs,the maximum reflection loss of composite can reach 24.85dB and the frequency band width of above 10dB is 6.30GHz,which is a wide microwave absorption frequency band.