Synthesis of several millimeters long SiC–SiO2 nanowires by a catalyst-free technique

Dong, Shun; Li, Minglun; Hu, Ping; Cheng, Yuan; Sun, Boqian

doi:10.1016/j.jcrysgro.2016.07.037

Cited by 12 publications

(4 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to previous literatures, the possible formation mechanism of SiCnws could be explained as follows. [45][46][47] FeðC 2 H 5 Þ 2ðsÞ ! FeðC 2 H 5 Þ 2ðgÞ…”

Section: Resultsmentioning

confidence: 99%

“…According to previous literatures, the possible formation mechanism of SiCnws could be explained as follows. [ 45–47 ]

Fe {(C_{2} H_{5})}_{2 false(normals false)} \to Fe {(C_{2} H_{5})}_{2 false(normalg false)}

Fe {(C_{2} H_{5})}_{2 false(normalg false)} \to {Fe}_{(g)} + 10 {normalC}_{(s)} + 5 {normalH}_{2 false(normalg false)}

{Fe}_{(g)} \to {Fe}_{(1)}

{Si}_{(s)} \to {Si}_{(g)}

3 {normalC}_{(s)} + {normalO}_{2 false(normals false)} \to 2 {CO}_{(g)}

{Si}_{(g}

…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Preparation of SiC Nanowire/Carbon Fiber Composites with Enhanced Electromagnetic Wave Absorption Performance

Qian

Cai

et al. 2021

Adv Eng Mater

View full text Add to dashboard Cite

Herein, the SiC‐coated carbon fiber decorated with SiC nanowire (SiCnw/CF) composites are successfully prepared by one‐step chemical vapor infiltration (CVI) process. Microstructures, the formation mechanism of SiCnws, thermal stability performance, and electromagnetic wave (EMW) absorption performance of the composites are investigated in detail. In particularly, benefiting the dielectric loss and conductive loss, the SiCnw/CF composites obtained at 1500 °C exhibit superior EMW absorption property with the minimum reflection loss (RL) of −36.5 dB with the effective absorption band of 5.5 GHz at a thickness of 1.88 mm. This work provides a simple way to obtain and design the CF‐based materials with good microwave absorption.

show abstract

“…According to previous literatures, the possible formation mechanism of SiCnws could be explained as follows. [45][46][47] FeðC 2 H 5 Þ 2ðsÞ ! FeðC 2 H 5 Þ 2ðgÞ…”

Section: Resultsmentioning

confidence: 99%

“…According to previous literatures, the possible formation mechanism of SiCnws could be explained as follows. [ 45–47 ]

Fe {(C_{2} H_{5})}_{2 false(normals false)} \to Fe {(C_{2} H_{5})}_{2 false(normalg false)}

Fe {(C_{2} H_{5})}_{2 false(normalg false)} \to {Fe}_{(g)} + 10 {normalC}_{(s)} + 5 {normalH}_{2 false(normalg false)}

{Fe}_{(g)} \to {Fe}_{(1)}

{Si}_{(s)} \to {Si}_{(g)}

3 {normalC}_{(s)} + {normalO}_{2 false(normals false)} \to 2 {CO}_{(g)}

{Si}_{(g}

…”

Section: Resultsmentioning

confidence: 99%

Preparation of SiC Nanowire/Carbon Fiber Composites with Enhanced Electromagnetic Wave Absorption Performance

Qian

Cai

et al. 2021

Adv Eng Mater

View full text Add to dashboard Cite

show abstract

“…SiC NWs also show potential for fruitful applications in field emission displays, nanosensors, nanoscale electro-devices, and optoelectronic devices [1][2][3][4]. To date, many methods [5][6][7][8][9][10][11][12][13][14][15] have been applied to prepare SiC whiskers or NWs, including the most common and commercial methods such as chemical vapor deposition from silanes, thermal decomposition of rice hulls, and thermal reduction of silicon oxides, in particular on silica and carbon solid mixtures [16]. Though they are industrial production processes, there are still some shortcomings such as the large amount of energy and time consumption, the small amount of whiskers in the whiskers/particle products, and a certain amount of residual Si and C particles and low-melting Fe-Si alloy or other low-melting alloys in the products; most of all, these low-melting particles are detrimental phases in high-temperature environments.…”

Section: Introductionmentioning

confidence: 99%

Controllable Combustion Synthesis of SiC Nanowhiskers in a Si-C-N System: The Role of the Catalyst

2019

View full text Add to dashboard Cite

Silicon carbide (SiC) nanowhiskers (NWs) constitute an important type of optical and structural materials. Herein, SiC NWs were successfully combustion synthesized (CSed) in a Si-C-N system using tungsten (W) as a catalyst. Scanning electron microscopy, transmission electron microscopy, and X-ray diffraction were used to characterize the SiC NWs. Results of morphological characterization indicated that the W-catalyzed CSed SiC NWs products were fluffy from surface to the core, and they were about several hundred micrometers in length with diameters less than 1 µm. For the comprehensive understanding of the initial growing progress of W-catalyzed CSed SiC NWs, the absorption behavior of C, N, and Si atoms on the crystal planes of W (100), W (110), and W (111) surfaces was investigated by using first-principles calculations. The calculated surface energy (E surf ) of the studied W surfaces and the absorption energy of C, N, and Si atoms on different sites, indicate that the C atom has a priority to sink to the nanometer catalysts grain of W, and the pre-sunk C atom then reacts with Si atom to form NWs.

show abstract

“…Moreover, several techniques have been applied to prepare 1D Si 3 N 4 nanomaterials, including the pyrolysis of polymeric precursors, carbothermal reduction, and chemical vapor deposition (CVD)131415. Meanwhile, Si 3 N 4 nanomaterials with lengths on the order of millimeters or even centimeters could be more valuable in some fields (e.g., connections for devices and reinforcements for composites) compared with shorter versions161718. Thus, great efforts have been made to prepare ultralong Si 3 N 4 nanomaterials with high yields.…”

mentioning

confidence: 99%

Facile synthesis of silicon nitride nanowires with flexible mechanical properties and with diameters controlled by flow rate

Dong

Zhang

et al. 2017

Sci Rep

Self Cite

View full text Add to dashboard Cite

Ultralong Si3N4 nanowires (NWs) were successfully synthesized with size controlled in N2 gas by using an efficient method. The diameters of the Si3N4 NWs increased when the flow rate of N2 gas increased, with average diameters of 290 nm from flow rates of 100 ml/min, 343 nm from flow rates of 200 ml/min and 425 nm from flow rates of 400 ml/min. Young’s modulus was found to rely strongly on the diameters of the Si3N4 NWs, decreasing from approximately 526.0 GPa to 321.9 GPa; as the diameters increased from 360 nm to 960 nm. These findings provide a promising method for tailoring these mechanical properties of the NWs in a controlled manner over a wide range of Young’s modulus values. Vapour-liquid-solid (VLS) mechanisms were used to model the growth of Si3N4 NWs on the inner wall of an alumina crucible and on the surface of the powder mixture. Alumina may be an effective mediator of NW growth that plays an important role in controlling the concentrations of Si-containing reactants to support the growth of NWs on the inner wall of the alumina crucible. This approach offers a valuable means for preparing ultralong Si3N4 NWs doped with Al with unique properties.

show abstract

Synthesis of several millimeters long SiC–SiO2 nanowires by a catalyst-free technique

Cited by 12 publications

References 43 publications

Preparation of SiC Nanowire/Carbon Fiber Composites with Enhanced Electromagnetic Wave Absorption Performance

Preparation of SiC Nanowire/Carbon Fiber Composites with Enhanced Electromagnetic Wave Absorption Performance

Controllable Combustion Synthesis of SiC Nanowhiskers in a Si-C-N System: The Role of the Catalyst

Facile synthesis of silicon nitride nanowires with flexible mechanical properties and with diameters controlled by flow rate

Contact Info

Product

Resources

About