Synthesis of embedded ZrC-SiC-C microspheres via carbothermal reduction for thermal stability and electromagnetic wave absorption

Zhao, Kai; Ye, Fang; Cheng, Laifei; Liu, Renzhang; Liang, Jie; Li, Xin

doi:10.1016/j.apsusc.2022.153105

Cited by 20 publications

(5 citation statements)

References 47 publications

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“…Overall, S-700 and S-800 have excellent microwave absorption performance and are comparable to reported MAMs. Figure i summarizes the effective absorption frequency ranges and corresponding thicknesses of reported carbon composite MAMs. ,,− Obviously, S-700 outperforms most MAMs in terms of wide EAB at a low matching thickness. In addition, S-800 can serve as a promising X-band MAMs.…”

Section: Results and Discussionmentioning

confidence: 99%

Nanorod-Derived Conductive Carbon Networks and Titanates-Involved Multicomponent Interfaces for Broadband Microwave Absorption

Liu,

Cao,

Duan

et al. 2024

ACS Appl. Nano Mater.

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Conductive carbon networks and multicomponent interfaces have been constructed in Fe 3 O 4 /TiO 2 /C or Fe 2 TiO 4 / FeTiO 3 /C composites by pyrolyzing core−shell structured Febdc@TiO 2 nanorods at different temperatures. When the temperature rises to 700 °C, the growth of internal Fe 3 O 4 nanoparticles, the gradual damage of TiO 2 shells, and the maintenance of a onedimensional structure promote the formation of continuous conductive carbon networks in paraffin, thereby increasing complex permittivity and dielectric loss. With a further increase in temperature, phase conversion from ferromagnetic Fe 3 O 4 to antiferromagnetic Fe 2 TiO 4 and FeTiO 3 would result in the depletion of TiO 2 and C, generation of multiple interfaces, and collapse of the one-dimensional structure, causing a slight reduction in complex permittivity and dielectric loss. S-700 has a wide effective absorption bandwidth (EAB) of 6.84 GHz at 2.2 mm (covering the entire Ku band), and S-800 has a large EAB of 4.16 GHz at 2.8 mm, covering the entire X band. We can deduce that conductive carbon networks mainly composed of surface carbon and multiple interfaces between carbon and titanates with defects contribute significantly to conduction loss, dipole polarization, and interfacial polarization, both of which shape RL curves under the influence of interference cancellation. This work provides a feasible strategy based on the construction of conductive networks and multicomponent interfaces in metal−organic framework-derived carbon composites for broadened microwave absorption bandwidth.

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Section: Results and Discussionmentioning

confidence: 99%

Nanorod-Derived Conductive Carbon Networks and Titanates-Involved Multicomponent Interfaces for Broadband Microwave Absorption

Liu,

Cao,

Duan

et al. 2024

ACS Appl. Nano Mater.

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“…28 EDS images in Figure 7 illustrate the nanoscale uniform distribution of Zr, Si, O, and C elements in the shell of HCM-3. The introduction of Si-based groups in preceramic polymers can improve the high-temperature resistance of ceramic spheres, 29 because Si-contained components have the effect of inhibiting zirconia crystallization and preventing the rupture of microspheres caused by grain growth. Fine nanocrystal grains are obtained and maintained even after heat treatment at 1500 • C. 30…”

Section: Microstructure and Composition Characterizationmentioning

confidence: 99%

Monodispersed hollow ceramic microspheres fabricated based on preceramic polymers and pulse‐controlled coaxial injection

Qin,

Hu,

Zhang

2024

J Am Ceram Soc.

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Hollow ceramic microspheres (HCMs) have widespread applications in aerospace and electronic areas owing to their multiple merits such as low density, low thermal conductivity, oxidation, and high‐temperature resistance. In this work, monodispersed HCMs were fabricated based on preceramic polymers and the pulse‐controlled coaxial injection approach. The size and shell morphology of hollow ceramic spheres can be flexibly tailored by adjusting the diameters of coaxial needles, and the composition and flow rates of inner and outer liquids. As‐obtained HCMs were comprised of ultrafine nanocrystals of ZrO2, SiO2, ZrC, and SiC, which can enhance the interfacial polarization effect. Through optimization of microstructure and composition, the electromagnetic shielding performance of HCMs reached up to 45 dB in the frequency range of 12–18 GHz. This work demonstrates a facile and general method for the fabrication of monodispersed HCMs.

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“…Inspired by the moderation effect of additional dielectric components, there is also interest in the construction of multicomponent carbides/carbon composites with two different carbon components or carbides. 228 , 350 It needs be mentioned that when two kinds of carbon components are involved in final composites, one of them is usually utilized as 3D skeleton to afford microstructure effect while improving dielectric properties. 174 , 351 , 352 , 353 Hou et al.…”

Section: Multicomponent Carbides/carbon Compositesmentioning

confidence: 99%

“…As for multicomponent composites with two different carbides, one of them usually refers to those candidates that have very small particle size and are easily available under mild conditions, e.g., Mo 2 C and ZrC. 251 , 350 , 354 , 355 For example, Yuan et al. obtained 1D Mo 2 C/SiC/C fibers by the pyrolysis of PCS/MoO 2 (acac) 2 /PVP co-electrospinning fibers, and the uniform dispersion of Mo 2 C and SiC nanoparticles could generate abundant interfaces, defects, and synergistic effect, thus resulting in broad EM response with EAB of 6.87 GHz.…”

Section: Multicomponent Carbides/carbon Compositesmentioning

confidence: 99%

State-of-the-art in carbides/carbon composites for electromagnetic wave absorption

Hu,

Gai,

Liu

et al. 2023

iScience

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Synthesis of embedded ZrC-SiC-C microspheres via carbothermal reduction for thermal stability and electromagnetic wave absorption

Cited by 20 publications

References 47 publications

Nanorod-Derived Conductive Carbon Networks and Titanates-Involved Multicomponent Interfaces for Broadband Microwave Absorption

Nanorod-Derived Conductive Carbon Networks and Titanates-Involved Multicomponent Interfaces for Broadband Microwave Absorption

Monodispersed hollow ceramic microspheres fabricated based on preceramic polymers and pulse‐controlled coaxial injection

State-of-the-art in carbides/carbon composites for electromagnetic wave absorption

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