Developing biomass-derived three-dimensional porous carbon materials (porous foam, PCF) has become a common strategy to obtain lightweight and efficient electromagnetic microwave-absorbing materials. Without the introduction of template subsequent activation process, several ultra-lightweight honeycomb PCF samples were successfully prepared from dried ballonflower/yamakurage (DB) by simple calc...

sno nanoparticles were synthesized using microwave–assisted hydrothermal method. it was noticed that at 300 and 600 watt microwave power, sno formed and remained in the tetragonal phase. at 900 watt, sno2 started appearing and a mixture of sno and sno2 phases coexisted. the particle size varied from ~2 to ~13 nm at 300 to 900 watt radiation power. the uv-v absorption spectra showed the excitoni...

EDITORIAL article Front. Mater., 20 March 2023Sec. Polymeric and Composite Materials Volume 10 - 2023 | https://doi.org/10.3389/fmats.2023.1181978

Magnetized nonneutral plasma composed of electrons or positrons couples to the local microwave environment via cyclotron radiation. The equilibrium temperature depends on energy density near frequency. Fine copper meshes and cryogenic absorbing material were used lower effective radiation in ASACUSA's Cusp trap, resulting significantly reduced temperature.

Abstract A measuring complex for determining the coefficients of reflection and transmission electromagnetic radiation through radio-absorbing materials has been developed manufactured. Measurements are made by direct method comparison with a reference material. When radio waves an absorbing material, standard is air, when waves, sheet steel used as standard. The installation uses replaceable h...

Microwave absorbing property of composites containing Ag nanoparticles filled multiwalled carbon nanotube buckypaper (Ag-BP) has been investigated. Buckypaper doped with silver was prepared by direct dispersion and filtration method. From the low temperature resistivity measurement it was found that increasing doping level decreases the electrical conductivity of the buckypaper. 30 wt. % and 40...

The measurement of the microwave absorptivity of materials typically requires expensive and arcane equipment and methods. I show that, for moderately absorbing materials (loss tangent δ ' 0.005 or higher), useful measurements can be easily made using a thermometer and a normal domestic microwave oven: the heat absorbed for suitably designed sample size and geometry relates directly to the absor...