Characteristic Variation of Niobium Powder Produced under Various Reduction Temperature and Amount of Reductant Addition
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Cites background or methods from "Characteristic Variation of Niobium..."
...Note that these oxides are much cheaper than K2TaF7 and K2NbF7, respectively....
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...Notably, the particle size distribution and morphology of Nb powder will be controlled by certain operating conditions such as the mass balance between the molten salt and the raw material, stirring during the reaction, and feeding conditions of the raw materials [2,7-10]....
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...High purity Nb powder can be produced by the reduction of K2NbF7 by liquid sodium (Na) in molten salts [2], or by the reduction of Nb2O5 by magnesium (Mg) vapor or Mg+H2 gas [3-6], for example....
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...This powder morphology was similar to that observed in the conventional Na reduction of K2NbF7 [7-10]....
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...The first method is similar to the method used in the preparation of Ta powder where K2TaF7 is reduced by liquid Na [2,7-10]....
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9 citations
Cites methods from "Characteristic Variation of Niobium..."
...Niobium powders with a particle size of 70–200 nm were formed by the sodium-thermic reduction of potassium heptafluoroniobate in a salt melt [1]....
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References
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