Customizing the structure and chemical composition of ultralight carbon foams for superior microwave absorption performance

Freeze-Cast Ni-MOF Nanobelts/Chitosan-Derived Magnetic Carbon Aerogels for Broadband Electromagnetic Wave Absorption

“…The optimized Ni@C/NSCA-2 also holds considerable supremacy over other recently reported biomass-derived MAMs, graphene-based aerogels, MXene-based aerogels, and chitosan-derived carbon-based aerogels in terms of absorption strength, bandwidth, and filler content (Figure i–l and Tables S1–S4). ,− …”

High-performance microwave absorption by optimizing hydrothermal synthesis of BaFe12O19@MnO2 core–shell composites

“…Furthermore, measuring the complex permittivity ( ε r = ε ′ − jε ′′) and complex permeability ( μ r = μ ′ − jμ ′′) of the material determines the electromagnetic response of the composite absorber. 82 The real parts of these parameters represent storage capacity for electromagnetic waves, whereas the imaginary parts represent dissipation capacity. The maximum amount of EM radiation can be absorbed by an absorber when its input impedance is close to the impedance of a free space.…”

Microstructure controllable polyimide/MXene composite aerogels for high-temperature thermal insulation and microwave absorption

“…In another work, Li et al 45 also prepared a graphene/Fe 2 O 3 foam, exhibiting a RL min of −60.1 dB and an EAB of 6.2 GHz. Cheng et al 44 made a biomass-derived porous carbon material with a RL min of −46.9 dB and an EAB of 6.2 GHz. Although attractive microwave absorption performance was achieved, 46–49 these materials face two critical issues.…”