Multilevel structure carbon aerogels with 99.999 % electromagnetic wave absorptivity at 1.8 mm and efficient thermal stealth

Controllable preparation of 2D carbon paper modified with flower-like WS2 for efficient microwave absorption

“…46 For the purpose of studying the impedance matching and attenuation characteristics of the sample, |Z in /Z 0 | and α require to be considered. Impedance matching |Z in /Z 0 | evaluates whether electromagnetic waves can enter the material smoothly, which can be obtained from formula (2). The closer |Z in /Z 0 | approaches 1, the better impedance matching is obtained for the microwave absorber.…”

“…Therefore, it is crucial to explore novel microwave absorbers to cope with the problems caused by electromagnetic pollution. [1][2][3][4][5] At present, traditional microwave absorption (MA) materials are mostly powder materials. 6,7 However, powder materials cannot be used alone in practical applications.…”

“…Therefore, it is crucial to explore novel microwave absorbers to cope with the problems caused by electromagnetic pollution. 1–5…”

Fabrication of an Ultralight Ni-MOF-rGO Aerogel with Both Dielectric and Magnetic Performances for Enhanced Microwave Absorption: Microspheres with Hollow Structure Grow onto the GO Nanosheets

“…Communication technologies and electronic facilities have developed with high speed nowadays, which has caused electromagnetic radiation to become an increasingly serious problem. − Electromagnetic radiation not only has an influence on communication or electronic equipment but also can be harmful to human health. − Therefore, it is urgent to find a valid strategy to solve this problem. − Developing electromagnetic wave (EMW) absorption materials is a promising strategy to shield or alleviate electromagnetic radiation. − And the ideal EMW absorption materials need the merits of being lightweight and having thin matching thickness, strong absorption, and broad bandwidth. − To achieve this aim, researchers are committed to integrating these performances into one composite. − …”

Oleaster seed-derived activated carbon/ferrite nanocomposite for microwave absorption in the X-band range

“…Microwave absorbers perform based on permeability, permittivity, and tuned impedance matching deduced from the dissipation mechanism (Zhang et al, 2015a;Zhang et al, 2020a;Fang et al, 2022;Wang et al, 2022;Yang et al, 2022;Wang et al, 2023). In recent years, carbon-based electromagnetic wave absorbing materials and their composites have been under the spotlight as the hotspot due to their considerable electrical conductivity, salient relaxation loss potential, lightweight structure, and vast specific surface area (Guo et al, 2009;Ma et al, 2018;Zhou et al, 2022;Chen et al, 2023;Xie et al, 2023). However, conjugated carbonaceous materials are difficult for mass production in the industrial ways due to their complex synthetic procedures and high preparation costs, so using biomass-derived materials has gained huge attention.…”