Synthesis of Heterogeneous β-SiC Nano-Particles and Nano-Whisker from TEOS/SiO2 Bead/PMMA Ternary Xerogel


Article Preview

A modified sol-gel method is proposed for the preparation of silicon carbide nano-particles and nano-whisker. Tetraethoxysilane (TEOS), SiO2 bead, and PMMA as precursor of carbon source were used for preparing a ternary carbonaceous silicon xerogel, and morpholine is employed in the sol-gel process as a catalyst reagent. SiC nano-particles and nano-whisker were obtained from carbothermal reduction and vapor-solid (VS) reaction of the ternary xerogel at 1300°C for 9h in a dynamic argon atmosphere (flow rate; 600 cm3/min), and then purified by removing excess silica, residual carbon, and other impurities. The purified SiC sample was characterized by TG/DTA, XRD, SEM, and HRTEM. The nano-particles and the nano-whisker were synthesized by different growth mechanisms, with an initial nucleation via a VS reaction between SiO vapor and carbon precursor (PMMA) and a partially subsequent growth via a vapor-vapor (VV) reaction between SiO and CO, respectively.



Materials Science Forum (Volumes 486-487)

Edited by:

Hyung Sun Kim, Sang-Yeop Park, Bo Young Hur and Soo Wohn Lee




J. W. Kim et al., "Synthesis of Heterogeneous β-SiC Nano-Particles and Nano-Whisker from TEOS/SiO2 Bead/PMMA Ternary Xerogel", Materials Science Forum, Vols. 486-487, pp. 522-525, 2005

Online since:

June 2005




[1] M. Benaissa, J. Werckmann, G. Ehret, E. Peschiera, J. Guille and M.J. Ledoux: J. Mater. Sci. Vol. 29 (1994), p.4700.

[2] N. Keller, C. Pham-Huu, C. Crouzet, M. J. Ledoux, S. Savin-Poncet, J. B. Nougayrede and J. Bousquet: Catal. Today, Vol. 53 (1999), p.535.


[3] R. Westerheide, and J. Adler: Advances in hot gas filtration technique. In Ceramic Materials and Components for Engines, ed. J. G. Heinrich and F. Aldinger (Wiley-VCH Verlag GmbH, Weinheim, Germany, 2001, p.73).


[4] K. Schulz, A. Walch, E. Freude and M. Durst: High Temperature Gas Cleaning, ed. E. Schmidt, P. Gäng, T. Pilzand A. Dittler (Institut für Mechanische Verfahrenstechnik und Mechanik der Universität Karlsruhe, Karlsruhe, Germany, 1996, p.835).


[5] M.A. Alvin: Fuel Process. Tech. Vol. 56 (1998), p.143.

[6] R. Riedel, G. Passing, H. Schonfelder and R.J. Brook: Nature Vol. 355 (1992), p.714.

[7] C. Vix-Guterl, B. McEnaney and P. Ehrburger: J. Eur. Ceram. Soc. Vol. 19 (1999), p.427.

[8] O. Paccaud and A. Derre: Chem. Vap. Deposition, Vol. 6, No. 1 (2000), p.33.

[9] R. Moene, M. Makkee and J.A. Moulijn: Appl. Catal. A: General, Vol. 167 (1998), p.321.

[10] Powder Diffraction File, JCPDS, 1601 Park Lane, Swarthmore, PA 19081-2389, USA.

[11] N. K. Sharma, W. S. Williams and A. Zangvil: J. Am. Ceram. Soc. Vol. 67, No. 11 (1984), p.715.