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The Effect of Reducing Agent on the Production of Niobium Powder by Metallothermic Reduction
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 Title & Authors
The Effect of Reducing Agent on the Production of Niobium Powder by Metallothermic Reduction
Hwang, Sun-Ho; Yoon, Jae-Sik; Kim, Byung-Il;
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 Abstract
In this study, niobium powder was made from potassium heptafluoroniobite() using sodium(Na) as a reductant and KCl, KF as a diluent based on the hunter metallothermic reduction method. The excesses of reductant were varied from 0%, 3%, 5% and 7%. When 7% excess of sodium was used, the un-reacted sodium remained in the reacted product. The niobium powder has been achieved by reducing 50 g of with 5% sodium excess in a charge at a reduction temperature of . The proportion of fine fraction decreased appreciably and the yield of niobium powder improved from 65% to 85% with the increase of sodium excess. The average particle size of niobium powder is improved from 0.2 microns to 0.3 microns in the 5% excess sodium.
 Keywords
Niobium powder;Sodium;Potassium heptafluoroniobite;Metallothermic reduction method;
 Language
Korean
 Cited by
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