Enhanced microwave performance of highly ordered mesoporous carbon coated by Ni2O3 nanoparticles

Electromagnetic and microwave absorbing properties of the ordered mesoporous carbon (OMC) doped by Ni2O3 nanoparticles absorber was investigated for the first time. A minimum reflection loss (RL) value of -39 dB at 10.9 GHz and a broad absorption band with the RL values under -10 dB is obtained in the whole Ku-band and X-band when the thickness is 2.0 mm and 2.8 mm, respectively. It showed far more excellent microwave absorbing properties with respect to undoped Ni2O3 OMC/paraffin composite. This phenomenon could be attributed to the strong cooperative effect between Ni2O3 and OMC. (C) 2012 Elsevier B. V. All rights reserved.