ALUMINUM MATERIAL FOR ELECTROLYTIC CAPACITOR ELECTRODE, METHOD FOR PRODUCING ELECTRODE MATERIAL FOR ELECTROLYTIC CAPACITOR, ELECTRODE MATERIAL FOR ELECTROLYTIC CAPACITOR, AND ALUMINUM ELECTROLYTIC CAPACITOR

摘要

PROBLEM TO BE SOLVED: To provide an aluminum material for an electrolytic capacitor electrode in which an etch pit is uniformly generated at high density, thereby increasing a surface expansion rate and also increasing an electrostatic capacitance. SOLUTION: The aluminum material for an electrolytic capacitor has an aluminum purity of≥99.9 mass%, comprises Ti of >0.0005 to 0.0025 mass% and Zn of 0.0004 to 0.006 mass%, and in which, as impurities, Ga is regulated to≤0.002 mass%, V to≤0.001 mass%, Zr to≤0.001 mass% and Cr to≤0.001 mass%, respectively. COPYRIGHT: (C)2008,JPO&INPIT