Improved microwave absorption properties by atomic-scale substitutions

Quinary High‐Entropy‐Alloy@Graphite Nanocapsules with Tunable Interfacial Impedance Matching for Optimizing Microwave Absorption

“…[ 16,17,44,45 ] Such performances can always be represented as the heteroatom substitutions and as the vacancy defects in carbon‐based materials. [ 16,19,20 ] But it is found that the nanocapsules in this work possess a similar microstructure of graphitic shell. Thus, the interfacial polarization can be confirmed to be the only factor for optimizing the microwave absorption property.…”

Structural Modifications and Electromagnetic Property Regulations of Ti3AlC2 MAX for Enhancing Microwave Absorption through the Strategy of Fe Doping

“…Based on the mechanism of the magnetic loss, the correlated results may be originated from the occur of resonance in the high frequency range of 10 8 –10 10 Hz. [ 54,55 ] The corresponding phenomenon also probable caused by the nonferromagnetic structures, [ 36,56–58 ] such as the hierarchical Ti 3 AlC 2 and the more generated TiC tiny structure. Additionally, with the increasing of x from 0 to 0.4, the decreased real permeability might be resulted from the improved imaginary permeability because the energy conservation and coupling effect.…”

Enhanced microwave absorption performance of light weight N-doped carbon nanoparticles

“…Nitrogen-doped Fe@C nanocapsules also show similar fluctuating curves while carbon materials without heteroatoms doping generally show a smooth curves. 54 It is widely accepted that the ε r of carbon materials is strongly dependent on two factors: the degree of graphitization and microstructure. 31 It is proved by the aforementioned Raman spectra that the sample with the smaller particle size show a small degree of graphitization as subjected to the same pyrolysis process.…”