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Preparation of Niobium Metal Powder by Two-Stage Magnesium Vapor Reduction of Niobium Pentoxide

T. Satish Kumar, S. Rajesh Kumar, M. Lakshmipathi Rao, T. L. Prakash
2013 Journal of Metallurgy  
Magnesium vapor reduction of niobium pentoxide was studied using a laboratory system. Niobium powder was prepared by the magnesium vapor reduction at 1123 K for 5 hours and it contained about 8 mass % oxygen. However, the oxygen concentration could be decreased to 0.65% when it was prepared by double-step reduction by magnesium vapor and a chemical treatment. Controlled and diluted supply of magnesium vapor to the reaction front has averted excess heat generation at the reaction front and
more » ... ion front and thereby fine particles were produced. Effects of various factors on the vapor reduction process were studied and discussed.
doi:10.1155/2013/629341 fatcat:ruz67fr3y5frbc2sackufnu7pi