Study on the Synthesis of Nano-Crystalline Mg₂SiO₄ Powders by Aqueous Sol-Gel Process

Abstract:

The forsterite-structure Mg₂SiO₄ was successfully synthesized by the aqueous sol-gel method using Si sols dioxide and magnesium nitrate as starting materials instead of expensive organic solvent and metal alkoxides. The as-prepared nanopowders were characterized by X-ray diffraction (XRD), differential thermal analysis (DTA) and scanning electron microscope (SEM), respectively. The results showed that the calcination process of gel consisted of a series of oxidation and combustion reactions, accompanied by significantly exothermal effects. Highly reactive nanosized Mg₂SiO₄ powders were successfully obtained at 850 °C with particle size of 60~80 nm.

• Periodical: Key Engineering Materials (Volume 538)
• Pages: 142-145
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.538.142
• Online since: January 2013
• Authors: X.F. Chen, J. Li, T.T. Feng, Y.S. Jiang, X.H. Zhang, H.T. Wu, Y.L. Yue
• Keywords: Aqueous Sol-Gel Process, Mg₂SiO₄, Nanopowder Synthesis

References

[1] K. X. Song, X. M. Chen and C.W. Zheng: Ceram Int. Vol. 34 (2008), p.917.

[2] T. Tsunooka, M. Androu, Y. Higashida, H. Sugiura and H. Ohsato: J. Eur. Ceram. Soc. Vol. 23 (2003), p.2573.

[3] A. Kan, H. Ogawa and A. Yokoi: J Appl Phys. Vol. 42 (2003), p.6154.

[4] P. Liu, W. A. Su, G. G. Yao and X. B. Bian: J Electroceram. Vol. 21 (2007), p.478.

[5] G. G. Ya and P. Liu: Physica B. Vol. 405 (2010), p.547.

[6] A. Yokoi, H. Ogawa, A. Kan, H. Ohsato and Y. Higashida: J Ceram Soc Jpn. Vol. 112 (2004), p.1633.

[7] A. Thorvaldsen: Acta. Mater. Vol. 45 (1997), p.595.