To provide an aluminum material for an electrolytic capacitor electrode and the like, which is superior in etching characteristics, contributes for producing a capacitor that has high capacitance but does not increase its leakage current, and also shows superior fracture-resistant strength.
This aluminum material comprises: a core layer which has a predetermined composition and has such a thickness as to occupy 5% to 40% of a total thickness; and an outer layer stacked on at least one surface of the core layer. The core layer has a crystal structure in which crystals that show orientation components with a deviation angle of 10 degrees or less when viewed from the material surface among crystal orientation components satisfy the relationship by an area occupation rate of: 0.02≤[SCube+SGoss]/[SBrass+SC+SS]≤0.35, (wherein SCube represents a crystal orientation component of {100}<001>; SGoss represents {110}<001>; SBrass represents {110}<112>; SC represents {112}<111>; and SS represents {123}<634>). The outer layer is formed from aluminum with a purity of 99.6 mass% or higher; and has a crystal structure in which crystals that have a deviation angle of 10 degrees or less from a cubic orientation {100}<001> when viewed from the material surface occupy 80% or more by an area occupation rate SCube.
SOMIYA KAZUHISA
YOSHIDA KATSUOKI
| JP2000345271A | 2000-12-12 | |||
| JP2000091164A | 2000-03-31 | |||
| JPH05311360A | 1993-11-22 | |||
| JP2000345271A | 2000-12-12 | |||
| JP2000091164A | 2000-03-31 | |||
| JPH05311360A | 1993-11-22 |
Ken Takada
Yoshihito Shimizu