Efficient ferrite/Co/porous carbon microwave absorbing material based on ferrite@metal–organic framework

Wang, Lixi; Guan, Yongkang; Xu, Qiu; Zhu, Hongli; Pan, Shibing; Yu, Mingxun; Zhang, Qitu

doi:10.1016/j.cej.2017.06.006

Cited by 257 publications

(84 citation statements)

References 87 publications

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“…Pure carbon architectures, such as carbon nanotubes [12][13][14] and graphene [15,16], not only have high surface area and excellent conductivity but also exhibit intensive absorption at GHz level [17][18][19]. However, the absorption bandwidth of these carbon architectures cannot be satisfied due to the absence of magnetic loss [20]. Moreover, the poor flowability and dispersibility of the carbon nanotubes and graphene limit their use due to the difficulty for piping and praying to gain a uniform stealth coating.…”

Section: Introductionmentioning

confidence: 99%

In-situ growth of Fe/Fe3O4/C hierarchical architectures with wide-band electromagnetic wave absorption

Meng

Zhang

et al. 2018

Ceramics International

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Carbon materials have aroused extensive interests for their remarkable electrical properties as electromagnetic wave (EMW) absorption. However, the synthesis of the wide-band electromagnetic wave absorbent is an insuperable challenge for attaining effective refection loss and electromagnetic matching. Herein, a facile method for large-scale synthesis of monodispersed Fe/Fe 3 O 4 /C composite microspheres is proposed. The carbon microspheres (1-2 μm in diameter) imbedded with nanosized Fe/Fe 3 O 4 2 particles (10-20 nm) are uniformly produced by polymerization and carbothermic reduction processes. The products exhibit the minimum refection loss-45.5 dB at 9.4 GHz and a broad bandwidth of 4.1 GHz below-10 dB from 7.8 GHz to 11.9 GHz with a thickness of 3.0 mm. The absorption mechanism indicates a unique deviated Debye dipolar relaxation effect in the absorbing bandwidth.

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Section: Introductionmentioning

confidence: 99%

In-situ growth of Fe/Fe3O4/C hierarchical architectures with wide-band electromagnetic wave absorption

Meng

Zhang

et al. 2018

Ceramics International

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“…Therefore, ultrafine particles are uniformly magnetized by external alternating microwave fields, and wave energy is dissipated by hysteresis loss, eddy current loss, and other loss mechanisms [35]. Notably, the impurities, the defects, and the interactions between electrons and electrons may all be the reasons for the several tiny impurity absorption peaks in the microwave band [36]. When the microwave is incident, the 3D network structure inside the porous Ni/Al 2 O 3 /Ni can be seen as many connected tubular loops, the cut-off grid is like a microwave receiving antenna for the adjacent tubular loops, and polarized current generated under the action of high-frequency magnetic fields propagates from the network surface to inside along the staggered tubular loops rapidly [37].…”

Section: Discussionmentioning

confidence: 99%

Effect of Porous Structure on the Microwave Absorption Capacity of Soft Magnetic Connecting Network Ni/Al2O3/Ni Film

Cheng

Shchukin

2020

Materials

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Microwave radar absorbing materials have been the focus of the radar stealth research field. In this study, ceramic structured porous honeycomb-like Al2O3 film was prepared by anodic oxidation, and an Ni layer was deposited on the Al2O3 film via electrodeposition in a neutral environment to form a flower- and grain-like structure in a three-dimensional (3D) network Ni/Al2O3/Ni film. The films both have a through-hole internal structure, soft magnetic properties, and absorb microwaves. The dielectric loss values of two films were little changed, and the maximum microwave absorption values of flower- and grain-like Ni/Al2O3/Ni film were −45.3 and −31.05 dB with relatively wide effective bandwidths, respectively. The porous ceramic structure Al2O3 interlayer prevented the reunion of Ni and isolated the eddy current to improve the microwave absorption properties. The material presented in our paper has good microwave absorption performance with a thin thickness, which indicates the potential for lightweight and efficient microwave absorption applications.

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“…The increased dielectric properties are attributed to enhanced interfacial polarization and porous structure. Compared with dielectric materials Ni(OH) 2 , the magnetic substance such as magnetic metals (e.g., Fe, Co, Ni, and their related alloys) and/ or metal oxides (e.g., γ-Fe 2 O 3 , Fe 3 O 4 , and CoFe 2 O 4 ) may be better alternatives [105][106][107][108]. Incorporating magnetic materials into biomass-derived PC not only enhances interfacial polarization, but also gains the favorable magnetic loss.…”

Section: Biomass-derived Pc-based Binary Composite Absorbermentioning

confidence: 99%

Biomass-Derived Porous Carbon-Based Nanostructures for Microwave Absorption

et al. 2019

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HIGHLIGHTS• The synthetic methods and corresponding mechanisms of porous carbon (PC)-based nanostructures from biomass resource are reviewed.• The application of biomass-derived PC in microwave absorption is discussed in terms of structure and composition optimization.ABSTRACT Currently, electromagnetic (EM) pollution poses severe complication toward the operation of electronic devices and biological systems. To this end, it is pertinent to develop novel microwave absorbers through compositional and structural design. Porous carbon (PC) materials demonstrate great potential in EM wave absorption due to their ultralow density, large surface area, and excellent dielectric loss ability. However, the large-scale production of PC materials through low-cost and simple synthetic route is a challenge. Deriving PC materials through biomass sources is a sustainable, ubiquitous, and low-cost method, which comes with many desired features, such as hierarchical texture, periodic pattern, and some unique nanoarchitecture. Using the bio-inspired microstructure to manufacture PC materials in mild condition is desirable. In this review, we summarize the EM wave absorption application of biomass-derived PC materials from optimizing structure and designing composition. The corresponding synthetic mechanisms and development prospects are discussed as well. The perspective in this field is given at the end of the article.

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Efficient ferrite/Co/porous carbon microwave absorbing material based on ferrite@metal–organic framework

Cited by 257 publications

References 87 publications

In-situ growth of Fe/Fe3O4/C hierarchical architectures with wide-band electromagnetic wave absorption

In-situ growth of Fe/Fe3O4/C hierarchical architectures with wide-band electromagnetic wave absorption

Effect of Porous Structure on the Microwave Absorption Capacity of Soft Magnetic Connecting Network Ni/Al2O3/Ni Film

Biomass-Derived Porous Carbon-Based Nanostructures for Microwave Absorption

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