Temperature-dependent dielectric and microwave absorption properties of silicon carbide fiber-reinforced oxide matrices composite

Gao, Hui; Luo, Fa; Wen, Qinlong; Yang, Haisheng; Qing, Yuchang

doi:10.1007/s10853-018-2708-3

Cited by 23 publications

(4 citation statements)

References 38 publications

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“…Figure 13 summarizes the microwave absorption bandwidth of typical ceramic-based composites as a function of temperature at different thicknesses reported in recent literature. [5,6,10,[22][23][24][25][26][27][28][29][30][31][32] It can be seen that our ceramic composites show a stable and the widest bandwidth higher than 10GHz from RT to 900 °C compared to other ceramic-based composites, such as oxide-based, PDC-based and other traditional ceramic based composites. This feature, combined with good thermomechanical properties, hightemperature stability and oxidation resistance, makes our ceramic composites ideal broadband EM absorbing materials for harsh environment applications.…”

Section: Discussionmentioning

confidence: 99%

“…Microwave effective absorption bandwidth (EAB) of ceramic composite in this work and ceramic-based composites reported in literature. [8,9,13,[27][28][29][30][31][32][33][34][35][36][37] where l, R, S are the thickness, resistance, and sectional area of the samples. The reported conductivity was the average value from three samples of each type.…”

Section: Discussionmentioning

confidence: 99%

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Polymer-derived SiOC reinforced with core-shell nanophase structure of ZrB2/ZrO2 for excellent and stable high-temperature microwave absorption (up to 900°C)

Jia

Yang

et al. 2022

Preprint

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Microwave absorbing materials for high-temperature harsh environments are highly desirable for aerodynamically heated parts and engine combustion induced hot spots of aircrafts. This study reports ceramic composites with excellent and stable high-temperature microwave absorption in air, which are made of polymer-derived SiOC reinforced with core-shell nanophase structure of ZrB2/ZrO2. The fabricated ceramic composites have a crystallized t-ZrO2 interface between ZrB2 and SiOC domains. The ceramic composites exhibit stable dielectric properties, which are relatively insensitive to temperature change from room temperature to 900oC. The return loss exceeds − 10dB, especially between 28-40GHz, at the elevated temperatures. The stable high-temperature electromagnetic (EM) absorption properties are attributed to the stable dielectric and electrical properties induced by the core-shell nanophase structure of ZrB2/ZrO2. Crystallized t-ZrO2 serve as nanoscale dielectric interfaces between ZrB2 and SiOC, which are favorable for EM wave introduction for enhancing polarization loss and absorption. Existence of t-ZrO2 interface also changes the temperature-dependent DC conductivity of ZrB2/SiOC ceramic composites when compared to that of ZrB2 and SiOC alone. Experimental results from thermomechanical, jet flow, thermal shock, and water vapor tests demonstrate that the developed ceramic composites have high stability in harsh environments, and can be used as high-temperature wide-band microwave absorbing structural materials.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Polymer-derived SiOC reinforced with core-shell nanophase structure of ZrB2/ZrO2 for excellent and stable high-temperature microwave absorption (up to 900°C)

Jia

Yang

et al. 2022

Preprint

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“…Journal of Advanced Ceramics https://mc03.manuscriptcentral.com/jacer only for their superior impedance matching and dielectric characteristics due to the good synergistic relationship between mullite and SiC, but also for their superior mechanical properties, high melting point, oxidation resistance and good chemical compatibility [24][25][26]. The current researches on the EMW absorption materials include SiCf/mullite [27], SiCN/mullite [28], SiCf/mullite-SiO2 [29], and porous mullite-Al2O3-SiC [30]. The introduction of mullite phase is expected to realize the effective enhancement of mechanical and EMW absorption properties of SiC-based materials.…”

Section: J U S T a C C E P T E Dmentioning

confidence: 99%

A novel mullite anti-gyroid/SiC gyroid ceramic metastructure based on digital light processing 3D printing with enhanced electromagnetic wave absorption and mechanical properties

Wang,

Chen,

Wang

et al. 2024

Journal of Advanced Ceramics

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“…Therefore, insulators are a kind of typical dielectrics. In addition to the permittivity of insulator materials, the permittivity of semiconductor materials has been studied for a long time [1][2][3][4][5][6]. It is well known that the permittivity of semiconductor materials is constant.…”

Section: Introductionmentioning

confidence: 99%

Permittivity modulation in Si-based PIN diode by electron irradiation

Wang¹,

Gong²,

Li³

et al. 2022

Semicond. Sci. Technol.

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In this paper, we investigate the influence of defects induced by different doses of electron irradiation on the real part of permittivity of Si-based PIN diodes with a deep-level transient spectrum test. For a more precise result, the relationship between the real part of the permittivity of the sample and the irradiation dose, temperature and annealing is studied. The results show that the real part of the permittivity changes significantly with the irradiation dose and temperature. The absolute value of the real part of the permittivity decreases with the decrease in temperature, and the changing trend decreases after annealing. The deep-level transient spectroscopy results illustrate that different states of defects caused by radiation and annealing have changed the free carrier mobility, free carrier density and charge balance in the material, which means they have a significant impact on the electrical characteristics of the samples. The I–V and C–V curves are obtained through experiments to extract the leakage current and carrier concentration. The I–V characteristic and the permittivity are subjected to temperature-variation analysis.

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Temperature-dependent dielectric and microwave absorption properties of silicon carbide fiber-reinforced oxide matrices composite

Cited by 23 publications

References 38 publications

Polymer-derived SiOC reinforced with core-shell nanophase structure of ZrB2/ZrO2 for excellent and stable high-temperature microwave absorption (up to 900°C)

Polymer-derived SiOC reinforced with core-shell nanophase structure of ZrB2/ZrO2 for excellent and stable high-temperature microwave absorption (up to 900°C)

A novel mullite anti-gyroid/SiC gyroid ceramic metastructure based on digital light processing 3D printing with enhanced electromagnetic wave absorption and mechanical properties

Permittivity modulation in Si-based PIN diode by electron irradiation

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