Substrate-free synthesis of 3D SiC network by carbothermal reduction method

Kong, Lingkai; Shen, Jianxing; Zhu, Zhiwen; Chen, Pan; Li, Min

doi:10.1016/j.matlet.2017.11.086

Cited by 5 publications

(3 citation statements)

References 26 publications

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“…To obtain specific properties, direct synthesis of SiC nano‐micron structures, especially 3D network, have attracted growing interests . SiC fiber is mainly used for high‐temperature materials and reinforced materials, because its heat and oxidation resistance are better than carbon fiber, and chemical stability is also good.…”

Section: Resultsmentioning

confidence: 99%

“…To obtain specific properties, direct synthesis of SiC nanomicron structures, especially 3D network, have attracted growing interests. 13 SiC fiber is mainly used for high-temperature materials and reinforced materials, because its heat and oxidation resistance are better than carbon fiber, and chemical stability is also good. The preparation of SiC using the carbothermal reduction method is always accomplished by means of a template, and the main methods for industrial preparation of SiC fibers are as follows: chemical vapor deposition (CVD), precursor conversion, and activated carbon fiber transformation method.…”

Section: Effect Of Carbon Source and Synthesis Temperature On The Smentioning

confidence: 99%

“…With the expansion of SiC applications, variety of new technologies for preparing SiC powders are emerging. At present, the preparation methods of SiC are carbothermal reduction method, mechanical alloying method, sol‐gel method, polymer thermal decomposition method, self‐propagation high‐temperature synthesis method, and chemical vapor deposition method, and the properties of SiC powders prepared by different synthetic methods are very different. Due to the wide range of raw materials and low price, the synthesis process is simple and the quality of products is stable; hence, the carbothermal reduction method is still the main method used in industrial production, which accounts for more than 90% of the total output of SiC production.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of SiC from acid‐leached coal gangue by carbothermal reduction

Guo

et al. 2018

Int J Applied Ceramic Tech

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For the comprehensive utilization of coal gangue, acid‐leached coal gangue was used as silicon source and part of carbon source, low ash anthracite and degreasing cotton were added respectively as supplementary carbon source, SiC and SiC fiber were prepared by carbothermal reduction method accordingly. The results show that the main components in leached coal gangue are amorphous SiO2 and carbon, which are suitable for the synthesis of SiC as raw materials. The synthesis temperature and holding time have important influence on the synthesis of SiC, and the optimum synthesis parameters for SiC are at 1550°C for 4 hours; under this condition, the yield of SiC is 78.27%, and the specific surface area is 6750 cm2/g. The results show that the resulting products are essentially composed of β‐SiC with a minor amount of α‐SiC. Besides, based on the carbon fiber transformation method, SiC fiber was prepared by using leached coal gangue and degreasing cotton as raw materials. Therefore, it can be concluded that leached coal gangue is a very effective and inexpensive source for preparing SiC, and more importantly, this work has important economic and social significance to realize waste recycling and control pollution.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Carbon Source and Synthesis Temperature On The Smentioning

confidence: 99%