Electromagnetic and wave absorbing properties of Fe-doped polymer-derived SiCN ceramics

Feng, Yongjun; Guo, Xue; Liu, Yu; Gong, Hongyu

doi:10.1039/c7ra09399c

Cited by 21 publications

(7 citation statements)

References 20 publications

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“…Figure 9 summarizes the absorption performance of typical PDCs composites as a function of EAB and sample thickness in the most recent literature. [30,32,[44][45][46][47][48][49][50][51][52][53][54][55][56] It can be seen that in our work, samples at thicknesses of 0.95 and 0.85 mm are capable of achieving %96.3% and %99.94% maximum EMW absorption, respectively. To the best of our knowledge, this is the first time that more than 99.9% EMW absorption has been reported for ceramic materials with a thickness of less than 1 mm, along with a super broad EAB (13.5 GHz), has been reported.…”

Section: Discussionmentioning

confidence: 86%

“…Absorption rates, effective absorption bandwidth (EAB), and thickness of polymer-derived ceramics from the literature review. [30,32,[44][45][46][47][48][49][50][51][52][53][54][55][56] The unique properties of our presented TiC/SiOC composites demonstrate a significant advantage over other reported EMW absorbing ceramic materials for harsh conditions applications.…”

Section: Discussionmentioning

confidence: 99%

“…Figure 9. Absorption rates, effective absorption bandwidth (EAB), and thickness of polymer-derived ceramics from the literature review [30,32,[44][45][46][47][48][49][50][51][52][53][54][55][56]. …”

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confidence: 99%

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Super‐Wideband Electromagnetic Absorbing TiC/SiOC Ceramic/Glass Composites Derived from Polysiloxane and Titanium Isopropoxide with Low Thickness (<1 mm)

Yang

Zhang

et al. 2022

Adv Eng Mater

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Herein, TiC/SiOC ceramic/glass composites with excellent electromagnetic wave (EMW) absorbing performance are fabricated by pyrolysis of polycarbosiloxane and titanium (IV) isopropoxide (TTIP). By taking advantage of the polymer‐derived route, the phase compositions and microstructures are easily tuned. The composites are investigated by X‐ray diffraction (XRD) analysis, scanning electron microscope, and transmission electron microscopy/energy dispersive spectroscopy. Nanoscaled TiC is formed and uniformly distributed without clustering within the SiOC matrix. Thermogravimetric Analysis (TGA) and in situ XRD results revealed good thermal stability and oxidation resistance mechanism. The presented material system (TiC/SiOC) shows a super‐wide microwave absorption bandwidth (EAB) of 13.5 GHz, including the entire Ka‐band (26.5–40 GHz) with a low thickness requirement (<1 mm). The superior EMW absorption properties of the ceramics are attributed to the optimal interface polarization, as well as the ordering, concentration, and interconnectivity of the conductive network, which all determine the electrical conductivity in the composites.

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Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

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Super‐Wideband Electromagnetic Absorbing TiC/SiOC Ceramic/Glass Composites Derived from Polysiloxane and Titanium Isopropoxide with Low Thickness (<1 mm)

Yang

Zhang

et al. 2022

Adv Eng Mater

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“…Therefore, incorporation of magnetic materials into a ceramic matrix is a good strategy to prepare EMW absorbing materials with excellent mechanical properties and corrosion resistance. Consequently, in recent years, a large number of magnetic metals related to ceramic composites with outstanding EMW absorption performance have been studied [64,78,208–213. ]…”

Section: Emw Absorbing Performance Of Magnetic-loss-type Ceramicsmentioning

confidence: 99%

Ceramic-based electromagnetic wave absorbing materials and concepts towards lightweight, flexibility and thermal resistance

Wen

et al. 2022

International Materials Reviews

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Electromagnetic wave (EMW) absorbing materials have attracted much attention in recent years due to the dramatical increase of high-frequency electronic components and devices, which generate electromagnetic (EM) pollution and cause serious electromagnetic interference (EMI). Ceramics and associated (nano)composites are widely investigated as EMW absorbing materials because of their excellent mechanical properties, chemical/ thermal stabilities, and oxidation/corrosion resistance. In addition to outstanding EMW absorbing performance, lightweight, flexibility and thermal resistance at high temperatures strongly affect their practical applications. Therefore, this review highlights the recent progress of advanced ceramic-based EMW absorbing materials by evaluating their vital EMW absorption parameters. First, the fundamentals of EMW absorption are briefly summarized, followed by the effects of phase/chemical composition, micro/nano structure, and morphology on the EMW absorbing performance and associated mechanisms. Furthermore, modern strategies for the preparation of lightweight, flexible and thermal resistant EMW absorbing materials are comprehensively reviewed. Finally, the perspectives of advancedceramics as EMW absorbing materials are discussed as well.

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“…[16][17][18][19] These Femodified composites were shown to be highly interesting with respect to their magnetic properties 15,[20][21][22][23] or interaction with electromagnetic waves. [24][25][26] It was reported that their temperature-dependent evolution of the phase composition is rather complex and involves the formation of various Fe-containing secondary phases. 13,17,19 In a case study related to a polymer-derived Si-Fe-O-C system, iron(III)acetylacetonate-modified polysiloxane was converted via pyrolysis into a singlephasic amorphous SiFeOC ceramic, which partitioned at relatively low temperature (<900 • C) to generate cementite (Fe 3 C) as a finely dispersed phase within the SiOC matrix.…”

Section: Introductionmentioning

confidence: 99%

Conversion of a polysilazane‐modified cellulose‐based paper into a C/SiFe(N,C)O ceramic paper via thermal ammonolysis

Ott

Peter

Wiehl

et al. 2021

Int J Applied Ceramic Tech

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Cellulose-based paper samples were surface-modified by a polymeric single-source precursor prepared from perhydropolysilazane (PHPS) and iron(III)acetylacetonate (Fe(acac) 3 ) and ammonolyzed at 500 • C, 700 • C, 900 • C, and 1000 • C, leading to C/SiFe(N,C)O-based ceramic papers with in situgenerated hierarchical micro/nano-morphology. As reference, cellulose-free samples were prepared under the same conditions. Upon thermal treatment, the microstructure evolutions of the resulting ceramic paper and the reference sample were comparatively investigated. Scanning electron microscopy (SEM) showed that for all temperatures, the ceramic papers exhibit the same morphology as the template, however, with noticeable shrinkage and curling, particularly evident at higher temperatures. X-ray diffraction (XRD) measurements of the reference samples and the ceramic papers showed a similar crystallization behavior and phase evolution in both materials. In the ceramic paper, the crystallization process seems to occur at a later time. The results provide a comprehensive understanding of the investigated C/SiFe(N,C)O-based ceramic system. It was shown that use of the cellulose-based paper template has the benefit of retaining the microstructure and furthermore, apart from transforming the cellulose fibers into turbostratic carbon, does not change the phase evolution during the polymer-to-ceramic transformation, allowing at the same time the manufacturing of novel morphologically complex parts by a convenient one-pot synthesis approach.

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Electromagnetic and wave absorbing properties of Fe-doped polymer-derived SiCN ceramics

Abstract: Fe-doped polymer-derived SiCN ceramics were synthesized by a precursor conversion method with different contents of nano-Fe2O3.

Cited by 21 publications

References 20 publications

Super‐Wideband Electromagnetic Absorbing TiC/SiOC Ceramic/Glass Composites Derived from Polysiloxane and Titanium Isopropoxide with Low Thickness (<1 mm)

Super‐Wideband Electromagnetic Absorbing TiC/SiOC Ceramic/Glass Composites Derived from Polysiloxane and Titanium Isopropoxide with Low Thickness (<1 mm)

Ceramic-based electromagnetic wave absorbing materials and concepts towards lightweight, flexibility and thermal resistance

Conversion of a polysilazane‐modified cellulose‐based paper into a C/SiFe(N,C)O ceramic paper via thermal ammonolysis

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