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Bamboo charcoal was expected to be a renewable carbon source for carbide materials in carbothermal reduction because of its superior characteristics. SiC powders with characteristic shapes were fabricated by carbothermal reduction with industrial silica sol and bamboo charcoal particles as silicon and carbon sources respectively, and the effects of reacting temperature and time on shape evolutions and properties of the as-prepared SiC powders were investigated. The silica sol/bamboo charcoal system was firstly transformed into SiO2/C system by the transition of silica sol and graphitization of bamboo charcoal, and the carbothermal reduction between SiO2 and C occurred at/above 1600 ℃. The characteristic shapes of SiC particles were transformed from string-beads-like to dumbbell-like and rod-like with the increase of reacting temperature. The prepared SiC powders are expected to become new raw material for silicon carbide ceramic composites.


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Preparation of SiC powders by carbothermal reduction with bamboo charcoal as renewable carbon source

Show Author's information Xingzhong GUOLin ZHUWenyan LIHui YANG*( )
Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

Abstract

Bamboo charcoal was expected to be a renewable carbon source for carbide materials in carbothermal reduction because of its superior characteristics. SiC powders with characteristic shapes were fabricated by carbothermal reduction with industrial silica sol and bamboo charcoal particles as silicon and carbon sources respectively, and the effects of reacting temperature and time on shape evolutions and properties of the as-prepared SiC powders were investigated. The silica sol/bamboo charcoal system was firstly transformed into SiO2/C system by the transition of silica sol and graphitization of bamboo charcoal, and the carbothermal reduction between SiO2 and C occurred at/above 1600 ℃. The characteristic shapes of SiC particles were transformed from string-beads-like to dumbbell-like and rod-like with the increase of reacting temperature. The prepared SiC powders are expected to become new raw material for silicon carbide ceramic composites.

Keywords:

carbides, chemical synthesis, X-ray diffraction (XRD), microstructure
Received: 23 January 2013 Revised: 24 February 2013 Accepted: 27 February 2013 Published: 04 June 2013 Issue date: June 2013
References(17)
[1]
Riley FL. Structural Ceramics: Fundamentals and Case Studies. Cambridge University Press, 2009.
[2]
Basu B, Balani K. Advanced Structural Ceramics. John Wiley & Sons, 2011.
[3]
Singh D, Zhu DM, Zhou YC, et al. Eds. Design, Development, and Applications of Engineering Ceramics and Composites: Ceramic Transactions. John Wiley & Sons, 2010.
[4]
Narisawa M, Yasuda H, Mori R, et al. Silicon carbide particle formation from carbon black—Polymethylsilsesquioxane mixtures with melt pressing. J Ceram Soc Jpn 2008, 116: 121–125.
[5]
Cui XL, Wang YH, Wang L, et al. Synthesis of nanometer-sized TiC and SiC from petroleum coke by reactive milling. Pet Sci Technol 2011, 19: 971–978.
[6]
Sulardjaka , Jamasri , Wildan MW, et al. Method for increasing β-SiC yield on solid state reaction of coal fly ash and activated carbon powder. Bull Mater Sci 2011, 34: 1013–1016.
[7]
Wang L, Hu XB, Xu XG, et al. Synthesis of high purity SiC powder for high-resistivity SiC single crystals growth. J Mater Sci Technol 2007, 23: 118–122.
[8]
Asada T, Ishihara S, Yamane T, et al. Science of bamboo charcoal: Study on carbonizing temperature of bamboo charcoal and removal capability of harmful gases. J Health Sci 2002, 48: 473–479.
[9]
Dai JL, Guo XZ, Yang H, et al. Study on the microstructure of bamboo charcoal. J Mater Sci Eng 2007, 25: 743–745 (in Chinese).
[10]
Guo XZ, Zhu L, Yang H, et al. Effects of additives on the microstructure of synthesized SiC particles by using silica sol/bamboo charcoal system. Mater Lett 2012, 73: 133–135.
[11]
Guo XZ, Zhang LJ, Yan LQ, et al. Preparation of silicon carbide using bamboo charcoal as carbon source. Mater Lett 2010, 64: 331–333.
[12]
Burda C, Chen XB, Narayanan R, et al. Chemistry and properties of nanocrystals of different shapes. Chem Rev 2005, 105: 1025–1102.
[13]
Yang GY, Wu RB, Pan Y, et al. Direct observation of the growth process of silicon carbide nanowhiskers by vapor–solid process. Physica E 2007, 39: 171–174.
[14]
Wu RB, Yang GY, Pan Y, et al. Prism-shaped SiC nanowhiskers. J Alloys Compd 2008, 453: 241–246.
[15]
Dhage S, Lee HC, Hassan MS, et al. Formation of SiC nanowhiskers by carbothermic reduction of silica with activated carbon. Mater Lett 2009, 63: 174–176.
[16]
Dhiman R, Johnson E, Morgen P. Growth of SiC nanowhiskers from wooden precursors, separation, and characterization. Ceram Int 2011, 37: 3759–3764.
[17]
Sōmiya S, Inomata Y, Eds. Silicon Carbide Ceramics: Fundamental and Solid Reaction. London: Elsevier Applied Science, 1991.
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Publication history

Received: 23 January 2013
Revised: 24 February 2013
Accepted: 27 February 2013
Published: 04 June 2013
Issue date: June 2013

Copyright

© The author(s) 2013

Acknowledgements

This work is supported by the High Science & Technique Brainstorm Project of Zhejiang Province of China (No. 2012C01032-1), Zhejiang Key Innovation Team Projects (No. 2009R50010), and Innovation Fund for Technology Based Firms (No. 12C26113303061).

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