Preparation and Characterization of Cr2O3 Nano-Powders by Sol-Gel Method


Article Preview

Cr2O3 nano-powders were successfully fabricated with using chromium nitrate and aqueous ammonia as starting material and urea as dispersant agent by sol-gel method. The formation of crystalline phase during heat treatment of dry gel was characterized by differential thermogravimetry (DTG) and X-ray diffraction (XRD) techniques and the temperature of calcination was determined as 400°C. Scanning electron microscopy (SEM) was utilized to observe the morphology of the as-fabricated Cr2O3 particles. The results showed that Cr2O3 particles are spherical or square with little agglomeration and a diameter of about 30 nm. The specific surface area of Cr2O3 particles was measured as 44.23 m2/g by Brunauer-Emmett-Teller (BET).



Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie




C. C. Zhu et al., "Preparation and Characterization of Cr2O3 Nano-Powders by Sol-Gel Method", Key Engineering Materials, Vols. 353-358, pp. 2111-2114, 2007

Online since:

September 2007




[1] H. Xu, T. Lou and Y. Li: Inorganic Chemistry Communications Vol. 7 (2004), p.666.

[2] D.W. Kim, S.G. Oh: Materials Letters Vol. 59 (2005), p.976.

[3] A.E. Gash, T.M. Tillotson, J.H. Satcher, L.W. Hrubesh and R.L. Simpson: Journal of Non-Crystalline Solids Vol. 285 (2001), p.22.


[4] Z. Yao, Z. Li and Y. Zhang: Journal of the Chinese Ceramic Society 30 (2002), p.116.

[5] X. Zheng: Jiangsu Ceramics Vol. 38 (2005), p.15.

[6] M. Cherian, M.S. Rao, S.S. Manoharan, A. Pradhan, and G. Deo: Topics in Catalysis Vol. 18 (2002), p.225 Fig. 6. SEM image of Cr2O3 particles.