Additive manufacturing of nanocellulose/polyborosilazane derived CNFs-SiBCN ceramic metamaterials for ultra-broadband electromagnetic absorption

Liu, Heqiang; Zhang, Yubei; Liu, Xingmin; Duan, Wenyan; Li, Minghang; Zhou, Qian; Li, Shan; Gong, Wei; Han, Guifang

doi:10.1016/j.cej.2021.133743

Cited by 51 publications

(16 citation statements)

References 46 publications

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“…The greater the attenuation coefficient, the stronger the EM absorption capacity. The attenuation constant α is usually calculated by eq , α = 2 π f c × ( μ ″ ε ″ − μ ′ ε ′ ) + false( μ false″ ε ″ − μ ′ ε ′ false) 2 + false( μ false″ ε ′ + μ ′ ε ″ false) 2 In Figure c, it shows the variation of the attenuation constant α value at the frequency of 1–18 GHz for all absorption materials. It is evident that the attenuation constant α values of all absorbing materials present an upward trend with the increasement of frequency.…”

Section: Resultsmentioning

confidence: 99%

Lightweight Honeycomb rGO/Ti₃C₂T_x MXene Aerogel without Magnetic Metals toward Efficient Electromagnetic Wave Absorption Performance

Bao

Guo

et al. 2023

ACS Appl. Electron. Mater.

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Nonmagnetic electromagnetic wave (EMW)-absorbing materials have aroused research interest on account of their light weight, chemical stability, and excellent dielectric property. However, it is still a great challenge to fabricate one kind of nonmagnetic EMW-absorbing materials with a unique structure and excellent EMW-absorbing performance. Herein, lightweight (∼3.2 mg/cm3) honeycomb rGO/Ti3C2T x MXene aerogel nanocomposites without magnetic metals were successfully fabricated via a green and convenient method in our work. Surprisingly, when the filler loading is only 5 wt % under the coaxial test, the minimum reflection loss (RL) value of the rGO/MXene-1:0.5 aerogel nanocomposite is −74.01 dB (99.99997% wave absorption) at 14.77 GHz with the thickness of only 1.80 mm. The effective absorption band (EAB) value under the arch test covers the whole C band, X band, and most of the C band. Furthermore, computer simulation technology (CST) data further demonstrated that the rGO/MXene-1:0.5 aerogel nanocomposite-covered model owns the smallest radar cross section (RCS) value, indicating that it possesses favorable radar wave attenuation capacity. Thus, the nonmagnetic honeycomb rGO/Ti3C2T x MXene aerogel nanocomposites can be promising candidates for designing efficient lightweight EMW absorbers.

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Section: Resultsmentioning

confidence: 99%

Lightweight Honeycomb rGO/Ti₃C₂T_x MXene Aerogel without Magnetic Metals toward Efficient Electromagnetic Wave Absorption Performance

Bao

Guo

et al. 2023

ACS Appl. Electron. Mater.

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“…The imaginary permittivity of the ceramic composites can be described by the following Eq. ( 7 ): 24 …”

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. 2023

Sci Rep

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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 900 °C. The return loss exceeds − 10 dB, especially between 28 and 40 GHz, 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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“…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%

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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Additive manufacturing of nanocellulose/polyborosilazane derived CNFs-SiBCN ceramic metamaterials for ultra-broadband electromagnetic absorption

Cited by 51 publications

References 46 publications

Lightweight Honeycomb rGO/Ti₃C₂T_x MXene Aerogel without Magnetic Metals toward Efficient Electromagnetic Wave Absorption Performance

Lightweight Honeycomb rGO/Ti₃C₂T_x MXene Aerogel without Magnetic Metals toward Efficient Electromagnetic Wave Absorption Performance

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)

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Additive manufacturing of nanocellulose/polyborosilazane derived CNFs-SiBCN ceramic metamaterials for ultra-broadband electromagnetic absorption

Cited by 51 publications

References 46 publications

Lightweight Honeycomb rGO/Ti3C2Tx MXene Aerogel without Magnetic Metals toward Efficient Electromagnetic Wave Absorption Performance

Lightweight Honeycomb rGO/Ti3C2Tx MXene Aerogel without Magnetic Metals toward Efficient Electromagnetic Wave Absorption Performance

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)

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Lightweight Honeycomb rGO/Ti₃C₂T_x MXene Aerogel without Magnetic Metals toward Efficient Electromagnetic Wave Absorption Performance

Lightweight Honeycomb rGO/Ti₃C₂T_x MXene Aerogel without Magnetic Metals toward Efficient Electromagnetic Wave Absorption Performance