Abstract

Several versions for the preparation of niobium powders by the reduction of niobium pentaoxide with magnesium are studied. The reaction in a powder mixture of the charge components is found to be explosive. The process occurs without explosion when the reduction is carried out in two stages and vaporous or liquid magnesium is used with periodical loading of portions of a pentaoxide powder. Niobium powders with a specific surface up to 25 m2/g are obtained in all versions. The specific charge of capacitor anodes prepared from the additionally deoxidized powders reaches 130000 μFV/g.

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