Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Tantalum Powder Preparation from Ta2O5 by Calciothermic Reduction

칼슘 열환원법에 의한 Ta2O5로부터 Ta분말제조

  • 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))
  • 하정우 (경북대학교 금속신소재공학과) ;
  • 손호상 (경북대학교 금속신소재공학과) ;
  • 정재영 (포항산업과학연구원)
  • Received : 2012.04.02
  • Published : 2012.11.25
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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%.

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References

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