Construction of Lightweight Honeycomb-like Nitrogen-doped Mesoporous Carbon/Cobalt/Cobaltons Oxide Composites and Wideband Absorbing Properties
The traditional microwave absorbing materials cannot meet the requirements of modern technology for stealth technology materials,such as"light weight,thin thickness,strong loss,wide absorption",so the development of efficient microwave absorbing materials has become the key to the development of stealth technology.In this paper,honeycomb nitrogen doped carbon/cobalt/cobalt oxide magnetoelectric composite microwave absorbing materials were obtained by precipitation combined pyrolysis process using honeycomb porous carbon and cobalt salt as carbon matrix and magnetic metal source,respectively.The honeycomb pore structure greatly reduces the density of the absorbing agent and endows it with lightweight characteristics.The introduction of magnetic components optimizes the impedance matching,and the magnetoelectric synergistic loss formed by dielectric and magnetic components enhances the electromagnetic wave absorption strength of the composite and widens the wave absorption band.Thanks to the advantages of composition and structure,when the filling amount is only 5wt%,the reflection loss peak at 2.5mm matching thickness reaches-52.84dB,and the effective absorption bandwidth at 2.7mm thickness reaches 4.83GHz.
lightweightmesoporous carbonCoO/Co magnetic particlesmultiple loss mechanismradar wave absorption
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