Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
권호 표지
DOI QR코드

DOI QR Code

Production of Fine Tantalum Powder by Electronically Mediated Reaction (EMR)

도전체 매개반응(EMR)법에 의한 미세 Ta 분말 제조

  • Park Il (Research Center of Advanced Materials Development, Chonbuk National University, School of Advanced Materials Engineering, College of Engineering, Chonbuk National University) ;
  • Lee Chuel Ro (Research Center of Advanced Materials Development, Chonbuk National University, School of Advanced Materials Engineering, College of Engineering, Chonbuk National University) ;
  • Lee Oh Yeon (Research Center of Advanced Materials Development, Chonbuk National University, School of Advanced Materials Engineering, College of Engineering, Chonbuk National University)
  • 박일 (전북대학교 신소재개발연구센터, 전북대학교 공과대학 신소재공학부) ;
  • 이철로 (전북대학교 신소재개발연구센터, 전북대학교 공과대학 신소재공학부) ;
  • 이오연 (전북대학교 신소재개발연구센터, 전북대학교 공과대학 신소재공학부)
  • Published : 2004.10.01

Abstract

Production of fine tantalum powder by calciothermic reduction of tantalum oxides ($Ta_{2}O_5$) pellet through an electronically mediated reaction (EMR) has been investigated. $Ta_{2}O_5$ pellet feed and reductant calcium-nickel (Ca-Ni) alloy were charged into electronically isolated locations in a molten $CaCl_2$ bath. The current flow through an external path between the feed (cathode) and reductant (anode) locations was monitored. The current approximately 4.7A was measured during the reaction in the external circuit connecting cathode and anode location. Tantalum powder with approximately 99 $mass\%$ purity was readily obtained after each experiment. Tantalum powder by EMR using $Ta_{2}O_5$ pellet feed was fine compared with that of metal powder by metallothermic reduction and EMR using $Ta_{2}O_5$ powder feed.

Keywords

File

Download PDF

References

  1. C. K. Gupta, Int. Met. Rev., 29(6), 405 (1984)
  2. C. K. Gupta and P. K. Jena, J. Less-Common Metals, 8, 90 (1965) https://doi.org/10.1016/0022-5088(65)90100-1
  3. M. A. Hunter, J. Metals, 5, 130 (1953)
  4. J. C. Sehra, D. K. Bose and P. K. Jena, Trans. Ind. Inst. Metals, Mar. (1968)
  5. C. B. Hamilton and H. A. Wilhelm, Proc. Iowa. Acad. Sci., 68, 189 (1961)
  6. CIBA Limited, Belgium Patent, 625,178 May 22, (1963)
  7. Juchi Toshiaki and Ono Kenji-Seie Repts Res-Instt. Togoko Uni. Ser., A13, 456 (1961)
  8. T. H. Okabe and D. R. Sadoway, J. Mat. Res, 13, 3372 (1998) https://doi.org/10.1557/JMR.1998.0459
  9. T. Uda, T. H. Okabe and Y. Waseda, J. Japan Inst. Metals, 62, 796 (1998) https://doi.org/10.2320/jinstmet1952.62.9_796
  10. T. H. Okabe, T. Uda and Y. Waseda: Shigen-to-SoZai (J. Min. Mater. Process. Inst. Jpn.) 114, 573 (1998)
  11. I. Park, T. H. Okabe and Yoshio Waseda, J. alloys and compounds, 280, 265 (1998) https://doi.org/10.1016/S0925-8388(98)00668-9
  12. T. H. Okabe, I. Park, K. T. Jacob and Yoshio Waseda, J. alloys and compounds, 288, 200 (1999) https://doi.org/10.1016/S0925-8388(99)00130-9
  13. I. Park, T. H. Okabe, Y. Waseda, H. S. Yu and O. Y. Lee, J. Mater, Trans., 42(5), 850 (2001) https://doi.org/10.2320/matertrans.42.850
  14. I. Park, T. H. Okabe, O. Y. Lee, C. R. Lee and Y. Waseda, J. Mater, Trans., 43(8), 2080 (2002) https://doi.org/10.2320/matertrans.43.2080
  15. F. S. Wartman, D. H. Baker, J. R. Nettle and V. E. Homme, J. Electrochem. Soc., 101, 507 (1954) https://doi.org/10.1149/1.2781146
  16. T. H. Okabe and Y. Waseda, J. Metals (JOM), 49, 28 (1997)