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http://dx.doi.org/10.3365/KJMM.2012.50.11.823

Tantalum Powder Preparation from Ta2O5 by Calciothermic Reduction  

Ha, Jung-Woo (Department of Materials Science and Metallurgical Engineering, Kyungpook National University)
Sohn, Ho-Sang (Department of Materials Science and Metallurgical Engineering, Kyungpook National University)
Jung, Jae-Young (Research Institute of Industrial Science & Technology(RIST))
Publication Information
Korean Journal of Metals and Materials / v.50, no.11, 2012 , pp. 823-828 More about this Journal
Abstract
Direct reduction of $Ta_2O_5$ using liquid calcium was investigated. The experiment was conducted in a closed stainless steel chamber in an Ar atmosphere for 5-120 minutes. Most of $Ta_2O_5$ was reduced to ${\alpha}-Ta$ in 30 minutes above 1173 K and at a molar ratio of Ca and $Ta_2O_5$ above 10. The particles size increased with the reaction temperature, but it did not change much above 1223 K. The oxygen content of metal Ta was about 1 wt%.
Keywords
tantalum; $Ta_2O_5$; calcium; calciothermic; direct reduction;
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  • Reference
1 W. P. Griffith and P. J. T. Morris, Notes and Rec. R. Soc. Lond. 57, 299 (2003).
2 Y. Y. Choi, Trend in Met. Mater. Eng. 21, 21 (2008).
3 S. W. Cho, G. Shim, J. S. Park, J. S. Kim, I. S. Bae, J. S. Yoon, and S. M. Jeong, Met. Mater. Int. 12, 51 (2006).
4 R. A. Brito, F. F. P. Medeiros, U. U. Gomes, F. A. Costa, A. G. P. Silva, and C. Alves Jr., Int. J. Refractory Met. & Hard Mater. 26, 433 (2008).
5 I. Gaballah, E. Allain, and M. Djona, Metall. Mater. Trans. B 28, 359 (1997).
6 K. Y. Park, H. J. Kim, and Y. J. Suh, Powder Tech. 172, 144 (2007).
7 D. K. Bose, Min. Proces. and Extr. Metall. Review 10, 217 (1992).
8 M. Baba, Y. Ono, and R. O. Suzuki, J. Phy. Chem. Solids 66, 466 (2005).