Ta-Nb ALLOY POWDER AND ANODE ELEMENT FOR SOLID ELECTROLYTIC CAPACITOR

WIPO Patent Application WO/2016/038711

A1

A Ta-Nb alloy powder produced by a thermal CVD method, the alloy powder having an Nb content of 1-50 mass%, an average primary-particle diameter of 30-200 nm. The Ta-Nb alloy powder preferably has a CV value per unit mass of the powder (μF·V/g) of 250 kμF·V/g or greater. More preferably, the Ta-Nb alloy powder, when compacted to a density σ (g/cm3) satisfying σc (g/cm3)=-0.012RNb+3.57 (where RNb is the Nb content (mass%) in the alloy), has a CV value per unit volume (μF·V/mm3) of 900 μF·V/mm3 or greater. The Ta-Nb alloy powder gives a capacitor which has a higher capacity than Ta capacitors and in which the oxide coating film has higher thermal stability than in Nb capacitors. Also provided is an anode element for solid electrolytic capacitors which is obtained from the alloy powder.

MAESHIMA TAKAYUKI (JP)
SATOH ISSEI (JP)
SAKAI HISAKAZU (JP)
FURUTANI JUN (JP)
TAKATA YOSHIHIKO (JP)
KONDO TSUKASA (JP)

PCT/JP2014/074018

March 17, 2016

September 11, 2014

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ISHIHARA CHEMICAL CO LTD (JP)

B22F1/00; B22F1/054; B22F1/10; B22F5/00; B22F9/22; H01G9/052

JPS6473009A	1989-03-17
JP2008101274A	2008-05-01
JP2000226607A	2000-08-15
JP2010265549A	2010-11-25
JP2004360043A	2004-12-24
US20020041819A1	2002-04-11

M.KREHL ET AL.: "Sintering of prealloyed Nb-Ta powders for use in electrolytic capacitors", MOD DEV POWDER METALL, vol. 17, 1985, pages 629 - 640, XP024158183
See also references of EP 3192595A4

GINZA MARONIE P. C. (JP)
Patent business corporation Ginza horse chestnut patent firm (JP)

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