FIELD: niobium nitride powders and electrolytic capacitors using them. SUBSTANCE: novelty is that nitrided niobium powder has in its composition nitrogen in amount of at least 300 ppm. Nitrided niobium powder sintered at 1200 1750 C is used in capacitor. Method for reducing dc leakage current through capacitor incorporating niobium anode includes stage of doping niobium powder with nitrogen in amount of at least 100 ppm. EFFECT: reduced dc current leakage in capacitor. 52 cl, 21 dwg, 7 tbl
