Synthesis of Ultra-Fine and High-Pure Zirconium Diboride Powders Using Solution-Based Processing

Abstract:

Article Preview

Ultra-fine and high-pure zirconium diboride powders were prepared by carbothermal reduction boronization of zirconia/boron carbide/carbon mixtures. Fine-scale mixing of the reactants was achieved by solution-based processing in which zirconium oxychloride (ZrOCl2⋅8H2O) as the zirconia-bearing precursor was precipitated in the suspension of boron carbide (B4C) and carbon powders in water. The carbothermal reduction boronization reaction was substantially completed at relatively low temperatures (<1600°C) and the resulting products (ZrB2 powders) had small average grain sizes (1~2 μm) and high purity (>99.6 wt%). The experiments indicated that excessive B4C and C were necessary during the carbothermal reduction boronization because of volatilization of boron and carbon elements. The effects of temperature and holding time on the synthesis of ZrB2 powders were also discussed.

Info:

Periodical:

Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

523-526

DOI:

10.4028/www.scientific.net/MSF.561-565.523

Citation:

C. A. Wang et al., "Synthesis of Ultra-Fine and High-Pure Zirconium Diboride Powders Using Solution-Based Processing", Materials Science Forum, Vols. 561-565, pp. 523-526, 2007

Online since:

October 2007

Export:

Price:

$35.00

[1] C. Morz, Am. Ceram. Soc. Bull., Vol., 74 (1995), p.165.

[2] F. Monteverde, A. Bellosi and S. Guicciardi, J. Euro. Ceram. Soc., Vol. 22 (2002), p.279.

[3] F. Monteverde, S. Guicciardi and A. Bellosi, Mater. Sci. Eng. A. Vol. 346 (2003), p.310.

[4] H. Zhao, Y. He and Z. Z. Jin, J. Am. Ceram. Soc. Vol. 78 (1995), p.2534.

[5] T. Tsuchida and S. Yamamoto, J. Eur. Ceram. Soc. Vol. 24 (2004), p.45.

[6] S. K. Mishra, S. Das and P. Ramchandrarao, J. Mater. Res. Vol. 17 (2002), p.2809.

[7] M.D. Sacks, C.A. Wang. Z. H. Yang, and A. Jain, J. Mater. Sci., Vol. 39 (2004), p.6057.

[8] Y.J. Yan, Z.R. Huang, S.M. Dong and D.L. Jiang, J. Am. Ceram. Soc., Vol. 89(2006), p.3585 Fig. 4 SEM morphology of the synthesized ZrB2 powder.

In order to see related information, you need to Login.