FIELD: niobium powders, processes for producing them, capacitors operating with use of niobium powder.
SUBSTANCE: method for producing flake niobium powder comprises steps of disintegrating niobium crumbs until preparing flake-type niobium powder; reducing flake-type niobium powder and disintegrating it. According to invention before reduction flake-type niobium powder has specific surface area equal at least to 1.5 m2/g. Reduction of flake-type niobium powder is repeated one or more times at disintegration of powder. Prepared powder has specific surface area equal at least to 5.5 m2/g. Electrolytic capacitor whose anode is made from such niobium powder or from composition containing such powder, has capacitance 65000 mcf x V/g.
EFFECT: possibility for making of powder materials capacitors with high capacitance and low DC leakage.
33 cl, 1 dwg, 1 tbl, 10 ex
