Efficient high-temperature electromagnetic wave absorption enabled by structuring binary porous SiC with multiple interfaces

Lan, Xiaolin; Wang, Zhijiang

doi:10.1016/j.carbon.2020.08.052

Cited by 100 publications

(20 citation statements)

References 50 publications

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“…Figure shows the comprehensive performance of the obtained N6/C6 aerogel in comparison with different reported absorption materials. The N6/C6 aerogel possesses a relatively higher EAB and lower density, which exceeds those of most of the reported materials (Table S1, Supporting Information, and Figure a). ,,,,− Moreover, The EAB covers the whole X-band even at 1000 °C, which is significantly higher than that of most reported wave absorption materials (Figure b and Table S2, Supporting Information). − This outstanding performance is attributed to the unique alternating multilayered structure design of the wave transparent Si 3 N 4 layer and wave absorption SiC layer, even in the high-temperature environment. The radar image in Figure c clearly shows the superiority of our alternating multilayered N/C aerogels when comparing with graphene, Mxene, Fe 3 O 4 , SiC fiber, and their composites.…”

Section: Resultsmentioning

confidence: 89%

Alternating Multilayered Si₃N₄/SiC Aerogels for Broadband and High-Temperature Electromagnetic Wave Absorption up to 1000 °C

Cai

Wang

et al. 2021

ACS Appl. Mater. Interfaces

111

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Lightweight electromagnetic (EM) wave absorbers made of ceramics have sparked tremendous interest for applications in EM wave interference protection at high temperatures. However, EM wave absorption by pure ceramics still faces huge challenges due to the lack of efficient EM wave attenuation modes. Inspired by the energy dissipation mechanism during fracture of lobster shells with a soft and stiff multilayered structure, we fabricate a highperformance EM wave absorption ceramic aerogel composed of an alternating multilayered wave transparent Si 3 N 4 (N) layer and wave absorption SiC (C) layer by a simple restack method. The obtained N/C aerogel shows ultralow density (∼8 mg/cm 3 ), broad effective absorption bandwidth (8.4 GHz), strong reflection loss (−45 dB) at room temperature, and excellent EM wave absorption performance at high temperatures up to 1000 °C. The attenuation of EM wave mainly results from a "reflection−absorption−zigzag reflection" process caused by the alternating multilayered structure. The superior absorption performance, especially at high temperatures, makes the N/C aerogel promising for next-generation wave absorption devices served in high-temperature environments.

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Section: Resultsmentioning

confidence: 89%

Alternating Multilayered Si₃N₄/SiC Aerogels for Broadband and High-Temperature Electromagnetic Wave Absorption up to 1000 °C

Cai

Wang

et al. 2021

ACS Appl. Mater. Interfaces

111

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“…For example, the sinterability of SiC powders and the mechanical properties of sintered SiC ceramics can be greatly improved by the morphology modification of SiC crystals 3,4 . The electromagnetic wave absorption and photoluminescence properties of SiC are also dependent on the crystal morphology of SiC 5–7 . SiC can be synthesized by different methods, such as carbothermal reduction, 8 sol–gel process, 9 gas phase reaction, 10 and combustion synthesis 11 .…”

Section: Introductionmentioning

confidence: 99%

Controlled growth of SiC crystals in combustion synthesis

Cui

Tian

et al. 2021

J Am Ceram Soc

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β-SiC powders with different particle morphologies were prepared by combustion synthesis in an N 2 atmosphere, with carbon black, carbon fiber, graphene, and graphite as carbon sources. With carbon black as the carbon source, singlephase β-SiC nanopowder with an average particle size around 20 nm was obtained. From carbon fiber and graphene, SiC fibers and sheets were produced, which were polycrystalline and consisted of lots of nanocrystals with random orientations. It was proposed that the synthesis of SiC occurs by gas-solid reaction and the growth of SiC is confined to the carbon particles. In the controlled growth of SiC, the morphology of the precursor carbon is preserved, offering an opportunity to control the particle morphology of SiC by changing carbon sources.

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“…In recent years, porous silicon carbide (SiC)‐based geopolymer materials have attracted much attention. The characteristics of geopolymer materials are high strength, high temperature resistance, and chemical stability 1–4 . Geopolymers are generated by the reaction of aluminosilicate materials (metakaolin [MK], fly ash, waste glass, etc.)…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Recently, several articles have shown the preparation of porous SiC‐based composite materials 1–4 . Lan et al prepared carbon nanotube‐derived binary porous SiC with multiple interfaces that were successfully fabricated by structuring SiC nanowire networks in a porous SiC skeleton 1 . Liao et al fabricated a porous SiC ceramic as a catalyst support for a porous CuO/ZnO/CeO 2 /ZrO 2 catalyst via a solution combustion method and used the ceramic in a microreactor 2 .…”

Section: Introductionmentioning

confidence: 99%

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Elucidating the effects of silicon carbide sludge and waste glass fiber on the characteristics of porous eco‐fireproof materials

Lin

Cheng

et al. 2021

Env Prog and Sustain Energy

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This study used silicon carbide sludge (SCS) and waste glass fiber (WGF) to prepare SCS/WGF porous (SWP) eco‐fireproof materials by a hydrogen peroxide foaming agent. The results showed that the compressive strength of samples that were cured for 1 day and had an SCS replacement level of 10% and added amounts of WGF of 0.5% and 2.0% were 0.32 and 0.46 MPa, respectively. Additionally, it was observed that the stress–strain curves were relatively extended. WGF could improve the geopolymeric matrix of the composites in terms of formation and/or redistribution of cracks by bridging cracks and perforations within the matrix. When the added amounts of WGF were 0.5% and 2.0%, the reverse‐side temperatures of the samples were 238 and 262°C, respectively, which showed that adding an appropriate amount of WGF could effectively reduce the reverse‐side temperature of SWP eco‐fireproof materials. The results displayed the beneficial influence of SCS and WGF in improving bulking density, compressive strength, and flexural strength and in reducing porosity and thermal conductivity. Therefore, the results showed that SWP eco‐fireproof materials reinforced using SCS and WGF have potential as building materials.

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Efficient high-temperature electromagnetic wave absorption enabled by structuring binary porous SiC with multiple interfaces

Cited by 100 publications

References 50 publications

Alternating Multilayered Si₃N₄/SiC Aerogels for Broadband and High-Temperature Electromagnetic Wave Absorption up to 1000 °C

Alternating Multilayered Si₃N₄/SiC Aerogels for Broadband and High-Temperature Electromagnetic Wave Absorption up to 1000 °C

Controlled growth of SiC crystals in combustion synthesis

Elucidating the effects of silicon carbide sludge and waste glass fiber on the characteristics of porous eco‐fireproof materials

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Efficient high-temperature electromagnetic wave absorption enabled by structuring binary porous SiC with multiple interfaces

Cited by 100 publications

References 50 publications

Alternating Multilayered Si3N4/SiC Aerogels for Broadband and High-Temperature Electromagnetic Wave Absorption up to 1000 °C

Alternating Multilayered Si3N4/SiC Aerogels for Broadband and High-Temperature Electromagnetic Wave Absorption up to 1000 °C

Controlled growth of SiC crystals in combustion synthesis

Elucidating the effects of silicon carbide sludge and waste glass fiber on the characteristics of porous eco‐fireproof materials

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Alternating Multilayered Si₃N₄/SiC Aerogels for Broadband and High-Temperature Electromagnetic Wave Absorption up to 1000 °C

Alternating Multilayered Si₃N₄/SiC Aerogels for Broadband and High-Temperature Electromagnetic Wave Absorption up to 1000 °C