Starck Vtech Ltd.

Hiroo Naito

Tantalum powder used as an anode material for an electrolytic capacitor comprising usual tantalum powder (having an average particle size ranging from 1.0 to 5.0 .mu.m) mixed with tantalum powder having an average particle size on the order of nanometers (ranging from 10 to 500 nm) in an amount ranging from 1 to 25 parts by weight per 100 parts by weight of the former; an anode body for use in an electrolytic capacitor which is produced by sintering the tantalum powder; an electrolytic capacitor in which the anode body is incorporated. The tantalum powder ensures high strength of bonding with a tantalum wire even when it is pelletted at a low density and sintered at a low temperature, which has high strength such that it can withstand the thermal decomposition temperature of manganese nitrate and which permits the production of an anode body having excellent electrical properties, in particular, a high breakdown voltage in addition to the foregoing properties, an anode body produced using the tantalum powder and an electrolytic capacitor in which the anode body is incorporated.

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Omiya-machi, Japan

Hiroo Naito