Ta—Nb alloy powder and anode element for solid electrolytic capacitor

Abstract

A Ta—Nb alloy powder which provides a capacitor having a higher capacitance than a Ta capacitor and a better thermal stability in terms of an oxide film than a Nb capacitor, the Ta—Nb alloy powder being a Ta—Nb alloy powder produced by a thermal CVD method, wherein a content of Nb is 1 to 50 mass %, and an average particle diameter of primary particles is 30 to 200 nm, preferably, a CV value per unit mass of the powder (μF·V/g) is 250 kμF·V/g or more, or further, a CV value per unit volume (μF·V/mm3) in terms of a molded body whose molding density ρ (g/cm3) is ρc (g/cm3)=−0.012RNb+3.57, wherein RNb:Nb content (mass %) in an alloy, is 900 μF·V/mm3 or more, and an anode element for a solid electrolytic capacitor using the alloy powder.

Dependencies are inferred from the claim text.