Carbon fibers@Co-ZIFs derivations composites as highly efficient electromagnetic wave absorbers

To reduce electromagnetic (EM) wave interference pollution, in this work, carbon fibers@Co-ZIFs derivations (CFZD) as an advanced EM wave absorbing material was successfully prepared. The yolk-shell structure of the magnetic metal particles generated a large amount of contact area, facilitating the interface polarization and relaxation. As a result, the optimized sample delivers a maximum reflection loss (RL) value of -19.2 dB with a bandwidth of 2.6 GHz at a small thickness of 1.3 mm. Additionally, ANSYS Electronics Desktop 2018 (HFSS) was used to simulate the radar cross section (RCS) reduction in practical application based on these composites. The RCS values of composite coatings are less than -10 dB m(2) at the range of -90 degrees < theta<90 degrees, which indicate the effective reduction of the radar reflection signal by the composite coatings. The work is of reference significance for preparing great absorbing materials and designing absorbing coatings by combining simulation method. (C) 2021 Published by Elsevier Ltd on behalf of Chinese Society for Metals.

Automated summary

By preparing carbon fibers@Co-ZIFs derivations as advanced EM wave absorbing materials and optimizing the interface for maximum reflection loss, electromagnetic wave interference pollution can be effectively reduced. Additionally, absorbing composite coatings designed using simulation methods can effectively reduce radar reflection signals, providing a reference for preparing absorbing materials and designing coatings.