Effects of diameter and hollow structure on the microwave absorption properties of short carbon fibers

In-situ synthesis of carbon nanotubes decorated by magnetite nanoclusters and their applications as highly efficient and enhanced microwave absorber

“…The absorption bandwidth with RL values exceeding −10 dB is in the frequency range from 3.0 to 18.0 GHz with an absorber thickness of 1.1-5.0 mm. The effective bandwidth of Fe 3 O 4 /MWCNTs hybrids (RL > −10 dB) covers the whole C band (4-8 GHz) and X band (8)(9)(10)(11)(12), as well as partial K u band (12)(13)(14)(15)(16)(17)(18), which is of great significance for the weather radar, satellite communications, direct broadcast satellite and military radar system, owing to their high resolution imaging and target identification abilities [36]. Obviously, in comparison with that of the MWCNTs and Fe 3 O 4 , the microwave absorption properties of Fe 3 O 4 /MWCNTs hybrids are obviously increased, which is possibly attributed to the synergistic effect between MWCNTs and Fe 3 O 4 .…”

“…To address these issues, multifarious microwave absorbing materials, which can attenuate microwave by converting them into heat or dissipating them via interference, have been extensively investigated, including ferrites [8,9], magnetic metals [10,11], carbon fibers [12,13] and conductive macromolecules [14,15]. Among them, magnetic ferrites have been widely used to absorbing microwave, due to their high magnetic loss.…”

Modified nano-magnetite coated carbon fibers magnetic and microwave properties

“…On the other hand, carbon fibers (CFs) due to low density, exquisite mechanical and excellent EM shielding properties, have been widely used as reinforcements and even EM interference suppressors [12,13]. Based on these backgrounds, magnetite coating on carbon fibers is a potential way to enhance the EM shielding properties of carbon fibers.…”

Improvement of mechanical and dielectric properties of PIP-SiCf/SiC composites by using Ti3SiC2 as inert filler

“…Accordingly, all these factors are directly related to the σ of the composites. And the σ is related to the content, geometrical characteristic and extent of agglomeration of the Ti 3 SiC 2 particles in the SiC matrix [34,35]. According to the percolation theory, the σ can be expressed by the following relationship [36,37]:…”