Transverse size effect on electromagnetic wave absorption performance of exfoliated thin-layered flake graphite

Duan, Yongli; Li, Yun; Wang, Deen; Wang, Ruiqi; Wang, Yongli; Hou, Liqiang; Yan, Xiaoya; Li, Qi; Yang, Wang; Li, Yongfeng

doi:10.1016/j.carbon.2019.07.078

Cited by 45 publications

(10 citation statements)

References 50 publications

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“…Thanks to the interlinked network structure of the as-prepared porous carbon aerogel, several points can be beneficial for improving microwave absorption performance. First of all, strong dipole polarization mechanisms and relaxation mechanisms, induced by the incompatibility of dipoles migrating and external electric field, are useful for enhancing dielectric loss ability [ 48 ]. Moreover, the aforementioned Cole–Cole curves of the as-synthesized 3D carbon aerogels (Fig.…”

Section: Resultsmentioning

confidence: 99%

Environmentally Friendly and Multifunctional Shaddock Peel-Based Carbon Aerogel for Thermal-Insulation and Microwave Absorption

Sheng²,

et al. 2021

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Highlights The eco-friendly shaddock peel-derived carbon aerogels were prepared by a freeze-drying method. Multiple functions such as thermal insulation, compression resistance and microwave absorption can be integrated into one material-carbon aerogel. Novel computer simulation technology strategy was selected to simulate significant radar cross-sectional reduction values under real far field condition. . Abstract Eco-friendly electromagnetic wave absorbing materials with excellent thermal infrared stealth property, heat-insulating ability and compression resistance are highly attractive in practical applications. Meeting the aforesaid requirements simultaneously is a formidable challenge. Herein, ultra-light carbon aerogels were fabricated via fresh shaddock peel by facile freeze-drying method and calcination process, forming porous network architecture. With the heating platform temperature of 70 °C, the upper surface temperatures of the as-prepared carbon aerogel present a slow upward trend. The color of the sample surface in thermal infrared images is similar to that of the surroundings. With the maximum compressive stress of 2.435 kPa, the carbon aerogels can provide favorable endurance. The shaddock peel-based carbon aerogels possess the minimum reflection loss value (RLmin) of − 29.50 dB in X band. Meanwhile, the effective absorption bandwidth covers 5.80 GHz at a relatively thin thickness of only 1.7 mm. With the detection theta of 0°, the maximum radar cross-sectional (RCS) reduction values of 16.28 dB m2 can be achieved. Theoretical simulations of RCS have aroused extensive interest owing to their ingenious design and time-saving feature. This work paves the way for preparing multi-functional microwave absorbers derived from biomass raw materials under the guidance of RCS simulations.

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Section: Resultsmentioning

confidence: 99%

Environmentally Friendly and Multifunctional Shaddock Peel-Based Carbon Aerogel for Thermal-Insulation and Microwave Absorption

Sheng²,

et al. 2021

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“…Carbon-based materials have been widely studied due to the excellent dielectric properties, special microstructure, low density, and abundant resources, such as graphene, porous carbon, multi-walled carbon nanotube, carbon fibers, and flake graphite. [36][37][38][39][40][41][42] In spite of that, as a single dielectric loss absorber, the microwave absorption properties of carbon materials are deeply limited due to the impedance mismatch. Therefore, to obtain better microwave absorption performance, carbon materials are always combined with other loss media materials (magnetic or dielectric components) to enhance impedance matching and multiple interface losses.…”

Section: Carbon-based Composite Microwave Absorption Materialsmentioning

confidence: 99%

Research Progress of Metal Organic Frameworks/Carbon‐Based Composites for Microwave Absorption

et al. 2021

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“…However, these materials cannot meet the increasing requirements of the EMW absorbing materials due to drawbacks like high density and being easily corroded or oxidized in harsh environments. To overcome these problems, carbon-based materials including graphite [ 8 , 9 ] and carbon nanotubes [ 10 , 11 ] have been developed to improve the EMW absorption because of low density, good thermostability, and corrosion resistance. As a representative of novel carbon-based nanomaterials, graphene is considered as an excellent EMW absorbing material due to its prominent carrier mobility, high surface area, ultra-light weight, and high thermal and chemical stability [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

One-Pot Hydrothermal Preparation of Fe3O4 Decorated Graphene for Microwave Absorption

Chen

Zhang

et al. 2020

Materials

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Fe3O4 decorated graphene was synthesized for electromagnetic wave absorption via a facile one-pot hydrothermal approach. The structure and morphology of the as-prepared nanomaterials were systematically investigated. The graphene oxide (GO) was reduced and Fe3O4 nanoparticles were evenly decorated on the surface of reduced graphene oxide (rGO) nanosheets. The average particle size of Fe3O4 nanoparticles is about 15.3 nm. The as-prepared rGO-Fe3O4 nanocomposites exhibited a good microwave absorption performance because of the combination of graphene and magnetic Fe3O4. When the thicknesses are 1.6 mm and 6.5 mm, the reflection loss (RL) values are up to −34.4 dB and −37.5 dB, respectively. The effective bandwidths are 3.8 and 1.9 GHz.

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Transverse size effect on electromagnetic wave absorption performance of exfoliated thin-layered flake graphite

Cited by 45 publications

References 50 publications

Environmentally Friendly and Multifunctional Shaddock Peel-Based Carbon Aerogel for Thermal-Insulation and Microwave Absorption

Environmentally Friendly and Multifunctional Shaddock Peel-Based Carbon Aerogel for Thermal-Insulation and Microwave Absorption

Research Progress of Metal Organic Frameworks/Carbon‐Based Composites for Microwave Absorption

One-Pot Hydrothermal Preparation of Fe3O4 Decorated Graphene for Microwave Absorption

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