Investigation of different graphite morphologies for microwave absorption at X and Ku-band frequency range

A synthetic strategy for graphitized carbon hollow nanospheres with nano-punched holes decorated with bimetallic selenide as efficient bifunctional electrocatalysts for rechargeable Li–O2batteries

“…37,38 Compared with PAHs, the D2 peak (∼1620 cm −1 ), which is indicative of the graphitic lattice vibration mode with E 2g symmetry, is newly observed in the spectrum of PGHs, and the D3 peak intensity is signicantly decreased. 39 The difference in Raman spectra between PAHs and PGHs indicates the synthesis of graphitic carbon and the elimination of most of the amorphous carbon during the graphitization and partial oxidation processes. The integrated intensity ratios of D 1 and G bands (I D1 /I G values) of PAHs and PGHs are 1.69 and 1.38, respectively.…”

An Innovative model of magnetically intercalated expanded graphite for calculating radar attenuation performance at 2–18 GHz

“…On the other hand, the layered structure of MEG can facilitate the multiple reflection of electromagnetic waves as shown in Fig. 3 c, so that its attenuation performance can be greatly improved [ 20 ]. Moreover, in the layered MEG, dielectric losses occur as a result of dipole polarization, interface polarization, conductance loss, and magnetic losses (e.g., magnetic resonance, magnetic-coupling effect, eddy current loss and magnetic hysteresis loss) so that the energy of electromagnetic wave can be greatly attenuated ( Fig.…”

“…It can form a large area of aerosols in the air under the dispersion action of pyrotechnic to attenuate electromagnetic waves [ 13 ]. This absorbing material has three main advantages as follows: (1) It gives full play to the strong natural resonance effect of magnetic particles in this band so that the electromagnetic wave is fully absorbed [ 14 , 15 ]; (2) The combination of magnetic materials and EG with dielectric properties can improve the impedance matching performance of the material, resulting in more incidence of electromagnetic waves into the material [ [16] , [17] , [18] , [19] ]; (3) The multilayer structure of EG also facilitates the multiple reflection of electromagnetic waves between the layers, result in continuously absorption of the electromagnetic waves, thereby improving the attenuation performance [ 20 ].…”

Three-Dimensional Magnetic Functionalized Graphene Composite Aerogels for Microwave Absorption: A Review

“…With the continuous development of materials science, carbon nanomaterials have found highly potential applications in dielectric-loss-type absorbing materials. These species have been widely extended, including the traditional activated carbon, 23 carbon black, 24 graphite and carbon nanotubes (CNTs), 25,26 onions, 27 fullerenes, and graphene. 28,29 Since 2004, Andre Gaim and Konstantin Novoselov have successfully separated single-layer graphene from graphite using a micromechanical stripping method.…”

“…With the continuous development of materials science, carbon nanomaterials have found highly potential applications in dielectric-loss- type absorbing materials. These species have been widely extended, including the traditional activated carbon, carbon black, graphite and carbon nanotubes (CNTs), , onions, fullerenes, and graphene. , Since 2004, Andre Gaim and Konstantin Novoselov have successfully separated single-layer graphene from graphite using a micromechanical stripping method. Graphene has been the focus of extensive research efforts because of its excellent electrical conductivity, high aspect ratio, large specific surface area, high thermal conductivity, and excellent optical and mechanical properties. − Graphene can be used as a MAM because of its high specific surface area and outstanding electrical conductivity.…”