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The Manufacturing Of Niobium Powder By Hunter Process

Author

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  • JAE-SIK YOON

    (Korea Basic Science Institute Suncheon Center, 315 Maegokdong, Suncheon, Jeonnam 540-742, Korea)

Abstract

Niobium powder was fabricated by metallothermic reduction process usingK2NbF7as the raw material,KClandKFas the diluents andNaas the reducing agent. The apparatus for the experiment was designed and built specifically for the present study. Varying properties of niobium powder depending on reaction temperature and excess of reducing agent were analyzed. The niobium particle size increased significantly as the reduction temperature increased from 993 to 1093 K. The particle size was fairly uniform at a given reaction temperature, varying from 0.2 μ m to 50 nm depending on the reaction temperature. The yield of niobium powder increased from 58 to 83% with an increase in reaction temperature. The average particle size of niobium powder was improved from 70 nm to 0.2 μ m with the increase in the amount ofNaexcess. In addition, the yield rate ofNbpowder was 82% in the 5% excess sodium.

Suggested Citation

  • Jae-Sik Yoon, 2010. "The Manufacturing Of Niobium Powder By Hunter Process," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 17(02), pages 223-228.
    • Handle: RePEc:wsi:srlxxx:v:17:y:2010:i:02:n:s0218625x10013898
    DOI: 10.1142/S0218625X10013898
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