Electromagnetic wave absorbing properties of SiC/SiO2 composites with ordered inter-filled structure

Yuan, Xiaoyan; Cheng, Laifei; Zhang, Litong

doi:10.1016/j.jallcom.2016.03.309

Cited by 54 publications

(22 citation statements)

References 35 publications

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“…(1-x)Sr 0.85 Gd 0.15 TiO 3 is a functional of frequency in the measured frequency range of Xband for the ceramics. The real part of complex permittivity ( ) represents the electric energy storage capability, and the imaginary part of complex permittivity ( ) symbolize the electric energy loss capability, respectively [30]. It is considered that the variation of Al better dielectric loss capacity in the electromagnetic wave range.…”

Section: Dielectric Propertiesmentioning

confidence: 99%

High-efficiency and ultra-thin electromagnetic wave absorption xAl2O3-(1-x)Sr0.85Gd0.15TiO3 ceramics in X-band

Xie

Yang

Zhou

et al. 2020

Preprint

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xAl2O3-(1-x)Sr0.85Gd0.15TiO3(x=0.2, 0.3, 0.4, 0.5) ceramics were fabricated by hot-press sintering. Their morphology, phase composition, conductivity, dielectric properties as well as microwave absorption performance were examined by scanning electron microscopy (SEM), X-ray diffraction (XRD), multifunction digital four-probe meter and vector network analysis, respectively. The microwave absorption of as-prepared xAl2O3-(1-x)Sr0.85Gd0.15TiO3 ceramics demonstrates excellent microwave absorbability. It is unexpectedly found that with a thickness of only 0.346 mm, xAl2O3-(1-x)Sr0.85Gd0.15TiO3 (x=0.2) ceramic exhibits an absorption bandwidth of 3.7 GHz (8.7-12.4 GHz), being consequential to reflection loss less than -10 dB (over 90% of microwave absorption). It is as well discovered that the minimum reflection loss and absorption peak frequency of xAl2O3-(1-x)Sr0.85Gd0.15TiO3 (x=0.3) with a thickness of 0.436 mm were -45.43 dB and 11.3 GHz, respectively. The prominent microwave absorption performance of the ceramic with such a thin thickness can be attributed to strong interfacial polarization, dielectric frequency dispersion, and good electromagnetic impedance matching. It indicates that the xAl2O3-(1-x)Sr0.85Gd0.15TiO3 ceramics with appropriate Al2O3 mass fraction and thickness showing good potential for effective microwave absorbing materials.

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Section: Dielectric Propertiesmentioning

confidence: 99%

High-efficiency and ultra-thin electromagnetic wave absorption xAl2O3-(1-x)Sr0.85Gd0.15TiO3 ceramics in X-band

Xie

Yang

Zhou

et al. 2020

Preprint

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“…9(f), where the frequency of minimal RL value shis from 16.7 to 11.9 GHz (see Table 3) as the high Fe 3 Si content layer number gradually increases from 1 to 5. The remarkable shiing effect could be explained by the quarter-wavelength (l/4) cancellation theory, which is widely accepted to investigate the relationship between absorption band frequency (f) and sample thickness (t m ) according to the following equation: [54][55][56][57]…”

Section: Em and Microwave Absorption Propertiesmentioning

confidence: 99%

Flexible Fe₃Si/SiC ultrathin hybrid fiber mats with designable microwave absorption performance

Hou

Zhang

et al. 2018

RSC Adv.

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“…Nos últimos anos, pesquisas envolvendo Material Absorvedor de Radiação Eletromagnética (MARE), vêm sendo gradativamente desenvolvidas [1][2][3][4]. Estes materiais têm propriedades químicas e físicas [4,5] que permitem seu comportamento como absorvedores de ondas eletromagnéticas, já que impedem a transmissão, ou o fluxo de energia, através dele em determinadas frequências.…”

Section: Introductionunclassified

“…O carbeto de silício é um material cerâmico semicondutor e tem características de absorção de ondas eletromagnéticas [16,17] devido às suas perdas dielétricas. Além disto, o SiC é inerte quimicamente, apresenta resistência à oxidação [2,4,18] e estabilidade química [2,3,17,19].…”

Section: Introductionunclassified

Caracterização eletromagnética do compósito de carbeto de silício e negro de fumo em matriz polimérica

Medeiros

Souza

et al. 2021

Matéria (Rio J.)

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RESUMO Este trabalho apresenta as propriedades eletromagnéticas de um Material Absorvedor de Radiação Eletromagnética (MARE) feito a partir de Carbeto de Silício (SiC) e Negro de Fumo (NF) como aditivos. O compósito SiC/NF foi produzido utilizando 70 %(m/m) de matriz de silicone, e variando as concentrações do aditivo em 3 %(m/m), 2 %(m/m) e 1 %(m/m) de NF com 27 %(m/m), 28 %(m/m) e 29 %(m/m) de SiC, respectivamente. A estrutura química e a morfologia das partículas de SiC e NF foram analisadas através de espectroscopia Raman e Microscopia Eletrônica de Varredura (MEV). As propriedades dielétricas dos MAREs foram obtidas por meio do analisador de rede vetorial na faixa de frequência de 12,4 a 18,0 GHz. Os resultados de refletividade mostraram que o compósito SiC/NF com 1 %(m/m) de NF apresentou a melhor absorção de radiação eletromagnética, chegando a -47,9 dB em 16,8 GHz com uma amostra de aproximadamente 5,5 mm de espessura.

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Electromagnetic wave absorbing properties of SiC/SiO2 composites with ordered inter-filled structure

Cited by 54 publications

References 35 publications

High-efficiency and ultra-thin electromagnetic wave absorption xAl2O3-(1-x)Sr0.85Gd0.15TiO3 ceramics in X-band

High-efficiency and ultra-thin electromagnetic wave absorption xAl2O3-(1-x)Sr0.85Gd0.15TiO3 ceramics in X-band

Flexible Fe₃Si/SiC ultrathin hybrid fiber mats with designable microwave absorption performance

Caracterização eletromagnética do compósito de carbeto de silício e negro de fumo em matriz polimérica

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Electromagnetic wave absorbing properties of SiC/SiO2 composites with ordered inter-filled structure

Cited by 54 publications

References 35 publications

High-efficiency and ultra-thin electromagnetic wave absorption xAl2O3-(1-x)Sr0.85Gd0.15TiO3 ceramics in X-band

High-efficiency and ultra-thin electromagnetic wave absorption xAl2O3-(1-x)Sr0.85Gd0.15TiO3 ceramics in X-band

Flexible Fe3Si/SiC ultrathin hybrid fiber mats with designable microwave absorption performance

Caracterização eletromagnética do compósito de carbeto de silício e negro de fumo em matriz polimérica

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Product

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About

Flexible Fe₃Si/SiC ultrathin hybrid fiber mats with designable microwave absorption performance