Influence of temperature and oxygen on the growth of large-scale SiC nanowires

CrystEngComm ◽  
2019 ◽  
Vol 21 (11) ◽  
pp. 1801-1808 ◽  
Author(s):  
Hongjiao Lin ◽  
Hejun Li ◽  
Tiyuan Wang ◽  
Qingliang Shen ◽  
Xiaohong Shi ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Carbothermal Reduction ◽  
Large Scale ◽  
Sol Gel ◽  
Influence Of Temperature ◽  
Sic Nanowires ◽  
Reduction Methods

This paper examines the influence of temperature and oxygen on the growth of large-scale silicon carbide nanowires by using a combination of sol–gel impregnation and carbothermal reduction methods.

Biomorphic SiC Prepared from Carbonized Millet by Sol-Gel and Carbothermal Reduction Processing

2010 ◽  
Vol 152-153 ◽  
pp. 1683-1686
Author(s):  
Qing Wang ◽  
Ya Hui Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Silicon Carbide ◽  
Phase Composition ◽  
Carbothermal Reduction ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carbon Template ◽  
Scanning Electron

Biomorphic silicon carbide (bioSiC) was prepared by high temperature pyrolysis and sol-gel and carbothermal reduction processing at 1600 oC. The morphology and microstructure of carbon-silica composites and purified bioSiC samples were characterized by scanning electron microscopy. The phase composition of the resulting sample was analyzed by X-ray diffraction. The results suggest that the bioSiC mainly consists of cubic ß-SiC, and principally replicates the shape and microstructure of the carbon template.

Synthesis of Biomorphic Silicon Carbide from Wood

2008 ◽  
Vol 1094 ◽  
Author(s):  
Kwok Cheung Li ◽  
Dickon H. L. Ng
Keyword(s):  
Silicon Carbide ◽  
Carbothermal Reduction ◽  
Wood Sample ◽  
Sol Gel ◽  
Reduction Process ◽  
Delonix Regia ◽  
Specific Strength ◽  
Sic Ceramics ◽  
Gel Technique

AbstractWe have successfully produced biomorphic SiC ceramics from silica-infiltrated wood samples of balsa (Ochroma pyramidale) and flame tree (Delonix regia). This conversion of wood sample to a structure of SiC was performed by a sol-gel technique and a carbothermal reduction process. The biomorphic products were confirmed containing β-SiC and their structures were replica of the original structures of the raw wood samples. The biomorphic products from the denser flame tree (C-SiC) had higher specific strength than that from the biomorphic product from balsa (SiC).

scholarly journals Optimal preparation of high-entropy boride-silicon carbide ceramics

2020 ◽  
Author(s):  
Yan Zhang ◽  
Shi-Kuan Sun ◽  
Wei-Ming Guo ◽  
Liang Xu ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Carbothermal Reduction ◽  
Powder Processing ◽  
Full Density ◽  
High Entropy ◽  
Sic Ceramics ◽  
Reduction Methods ◽  
Borothermal Reduction ◽  
Carbide Ceramics ◽  
Silicon Carbide Ceramics

Abstract High-entropy boride-silicon carbide (HEB-SiC) ceramics were fabricated by using boride-based powders prepared from borothermal and boro/carbothermal reduction methods. The effects of processing routes (borothermal reduction and boro/carbothermal reduction) of HEB powders were examined. HEB-SiC ceramics with nearly relatively full density (>98%) were prepared by spark plasma sintering at 2000oC. It was demonstrated that the addition of SiC led to slightly coarsening of the microstructure. The HEB-SiC ceramics prepared from boro/carbothermal reduction powders showed the fine-grained microstructure and higher Vickers’ hardness but lower fracture toughness values as compared with the same composition prepared from borothermal reduction powders. These results indicated that the selection of the powder processing method and the addition of SiC phase could contribute to the optimal preparation of high-entropy boride-based ceramics.

Preparation and characterization of SiC nanowires and nanoparticles from filter paper by sol–gel and carbothermal reduction processing

2007 ◽  
Vol 42 (15) ◽  
pp. 6439-6445 ◽  
Author(s):  
Wei Wang ◽  
ZhiHao Jin ◽  
Tao Xue ◽  
GangBin Yang ◽  
GuanJun Qiao
Keyword(s):  
Filter Paper ◽  
Carbothermal Reduction ◽  
Sol Gel ◽  
Sic Nanowires

Catalyst-free growth of high purity 3C-SiC nanowires film on a graphite paper by sol-gel and ICVI carbothermal reduction

2018 ◽  
Vol 212 ◽  
pp. 86-89 ◽  
Author(s):  
Hongjiao Lin ◽  
Hejun Li ◽  
Qingliang Shen ◽  
Xiaohong Shi ◽  
Xinfa Tian ◽  
...  
Keyword(s):  
High Purity ◽  
Carbothermal Reduction ◽  
Sol Gel ◽  
Catalyst Free ◽  
Sic Nanowires ◽  
Free Growth

Morphology-Controlled Synthesis of Nanostructured Silicon Carbide

2004 ◽  
Vol 815 ◽  
Author(s):  
Xiang-Yun Guo ◽  
Guo-Qiang Jin ◽  
Ya-Juan Hao
Keyword(s):  
Silicon Carbide ◽  
Chemical Composition ◽  
Carbothermal Reduction ◽  
Phenolic Resin ◽  
Preparation Method ◽  
Sol Gel ◽  
Controlled Synthesis ◽  
Nanostructured Silicon ◽  
Sol Gel Process

AbstractPhenolic resin and tetraethoxysilane were used to prepare a binary carbonaceous silicon xerogel, the precursor of silicon carbide (SiC). By employing different additives in the sol-gel process, a series of xerogel precursors with differently chemical composition were obtained. Heating these xerogels to 1250°C, nanostructured β-SiC with various morphologies including nanowires, nanofibers, nanoparticles and mesoporous SiC were produced via carbothermal reduction. The preparation method of the xerogels was presented and the influences of different additives on the sol-gel process and the SiC formation were discussed in this paper.

scholarly journals Optimal preparation of high-entropy boride-silicon carbide ceramics

2020 ◽  
Author(s):  
Yan Zhang ◽  
Shi-Kuan Sun ◽  
Wei-Ming Guo ◽  
Liang Xu ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Carbothermal Reduction ◽  
Powder Processing ◽  
High Entropy ◽  
Fine Grained ◽  
Sic Ceramics ◽  
Reduction Methods ◽  
Borothermal Reduction ◽  
Carbide Ceramics ◽  
Silicon Carbide Ceramics

Abstract High-entropy boride-silicon carbide (HEB-SiC) ceramics were fabricated using boride-based powders prepared from borothermal and boro/carbothermal reduction methods. The effects of processing routes (borothermal reduction and boro/carbothermal reduction) on the HEB powders were examined. HEB-SiC ceramics with > 98% theoretical density were prepared by spark plasma sintering at 2000 °C. It was demonstrated that the addition of SiC led to slight coarsening of the microstructure. The HEB-SiC ceramics prepared from boro/carbothermal reduction powders showed a fine-grained microstructure and higher Vickers’ hardness but lower fracture toughness value as compared with the same composition prepared from borothermal reduction powders. These results indicated that the selection of the powder processing method and the addition of SiC phase could contribute to the optimal preparation of high-entropy boride-based ceramics.

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