Highly flexible, erosion resistant and nitrogen doped hollow SiC fibrous mats for high temperature thermal insulators

Liu, Yanan; Liu, Yang; Choi, Woo Cheal; Chae, Su-Hyeong; Lee, Jin-Pyo; Kim, Byoung‐Suhk; Park, Mi‐Ra; Kim, Hee Young

doi:10.1039/c6ta09475a

Cited by 80 publications

(56 citation statements)

References 44 publications

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“…29 In Figure 6C, O1S peak at 532.7 eV corresponds to Si-O-C structure. 33 As shown in Figure 6D, Si2p peak can be separated into three peaks at 101.0, 102.0, and 103.4 eV, which are corresponding to Si-C, Si-O-C, and Si-O, respectively. The XPS results of the above analysis indicate that the Si-O-C structure is most likely to be SiO x C y .…”

Section: Resultsmentioning

confidence: 92%

“…The FTIR spectra of PF/PVA/silica emerged at 800 cm −1 and 1050-1170 cm −1 (Si-O-Si stretching), 1430 cm −1 (benzene ring), 1656 cm −1 (C = C stretching vibration), 2950 cm −1 (C-H stretching vibration peak), 3350 cm −1 (O-H stretching vibration), and 792 cm −1 (the transverse optical (TO) photons vibration mode of the Si-C bond) in cured nanowires. 29,[32][33][34][35] After sintering in Ar at 1400°C-1600°C, most chemical bonds disappeared, the stretching vibration peak of Si-C bond exists only. Moreover, with increasing heating treat temperature, the Si-C bond gradually became obvious.…”

Section: Resultsmentioning

confidence: 99%

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Photoluminescence property of inexpensive flexible SiC nanowires membrane by electrospinning and carbothermal reduction

Wei

Wang

et al. 2020

J Am Ceram Soc

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Silicon carbide nanowire (SiC NW), as a typical wide band gap semiconductor was used as light‐emitting materials and devices in high‐temperature and harsh environments due to its excellent properties. In this paper, flexible ultra‐long SiC NWs membrane was successfully synthesized by electrospinning and subsequently high‐temperature sintering using phenolic resin and silica sol as precursors. Results of system characterization reveal that SiC NWs possess a smooth and uniform surface with diameter distribution mainly between 50‐300 nm and a length of more than tens of micrometers, forming a network structure. The growth mechanism of synthesized nanowires was mainly carbothermal reduction in situ and was accompanied by vapor‐solid (V‐S) reaction. The present work provides a simple and cost‐effective way for controllable fabrication of SiC NWs membrane. The photoluminescence spectrum of SiC NWs membrane emerged a clear blue shift, indicating a potential application in optoelectronic devices and discussed the potential applications of SiC NWs membrane in other fields.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Photoluminescence property of inexpensive flexible SiC nanowires membrane by electrospinning and carbothermal reduction

Wei

Wang

et al. 2020

J Am Ceram Soc

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“…For comparison, κ of bulk solid following the kinetic theory would have an opposite trend since the group velocity of acoustic phonons reduces with higher material density (see Equation ). By effectively adopting the porous structures, negligible κ solid has been achieved by Fricke et al, Bisson et al, Si et al, and Buratti and Moretti with the silica aerogels, Wang et al110b with polyvinylpolymethylsiloxane (PVPMSA), and Liu et al with SiC . The κ eff values summarized in Figure a were measured at the room temperature, which indicates the insignificant κ rad as well.…”

Section: High‐temperature Thermal Transport In Porous Materialsmentioning

confidence: 96%

“…Various materials and structures have been fabricated to increase the porosity with the low density down to 0.1 mg cm −3 from the clay‐based forms currently used for insulating blocks in buildings, cellulose SiO 2 , and SiC,110d,115 and 2D materials like graphene and hBN, as shown in Figure 110a,118,122. Efforts to develop superinsulators have continuously scaled down the density of aerogels.…”

Section: High‐temperature Thermal Transport In Porous Materialsmentioning

confidence: 99%

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Advanced Materials for High‐Temperature Thermal Transport

Shin

Wang

Luo

et al. 2019

Adv Funct Materials

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High temperature processes are widely used in a variety of existing and emerging industrial and aerospace applications. The thermal properties of high‐temperature materials thus play an important role in controlling the thermal energy, as highlighted by successful applications of thermal barrier coating and aerogels. While thermal transport processes at room and low temperature have witnessed tremendous progress in the past two decades, particularly on the fronts of understanding basic heat transfer properties at the micro‐ and nanoscale, the understanding at high temperature is still at the nascent stage, owing to several unique features at high temperature, such as the dominant Umklapp scattering effect that can render a crystalline material amorphous‐like thermal properties, and the important radiation contribution at high temperature. This lack of systematic understanding, coupled with the challenges in maintaining high‐temperature stability in a large number of materials, has limited the development of materials to meet the thermal transport properties pertaining to several current and emerging high‐temperature applications. This Review is aimed at providing an overview of the basic mechanisms governing thermal transport processes at high temperature, to identify their unique features and challenges, and to explore opportunities in material research for high‐temperature thermal materials.

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The Rising of Flexible and Elastic Ceramic Fiber Materials: Fundamental Concept, Design Principle, and Toughening Mechanism

Qiang

Zhang

et al. 2022

Adv Funct Materials

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Traditional ceramic materials are suboptimal for use in complex environments because of their brittleness and sensitivity to flaws. As such, developing flexible and elastic ceramic materials is extremely urgent in frontier domains where high-frequency vibration or high-intensity bending environments are inevitable. Fibrillation of ceramic materials is an effective way for the transition of brittleness to flexibility and elasticity, due to its ability to absorb and dissipate stresses through large axial deformations. Here, a comprehensive review of the newly emerging flexible and elastic ceramic fiber materials is presented, starting from an introduction to the fundamental concept, followed by an in-depth analysis of the relationship between their microstructures and mechanical behaviors, laying emphasis on the toughening mechanism of both individual fibers and fiber assemblies. Finally, current challenges and future development are demonstrated. It is expected that this review may provide meaningful guidance for the advancement of ceramic fiber materials toward better performance and brighter prospects.

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Highly flexible, erosion resistant and nitrogen doped hollow SiC fibrous mats for high temperature thermal insulators

Abstract: Novel free-standing, flexible, acid/alkali-resistant and nitrogen doped hollow SiC fibrous mats bearing ultralow thermal conductivity are reported.

Cited by 80 publications

References 44 publications

Photoluminescence property of inexpensive flexible SiC nanowires membrane by electrospinning and carbothermal reduction

Photoluminescence property of inexpensive flexible SiC nanowires membrane by electrospinning and carbothermal reduction

Advanced Materials for High‐Temperature Thermal Transport

The Rising of Flexible and Elastic Ceramic Fiber Materials: Fundamental Concept, Design Principle, and Toughening Mechanism

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