| 摘要 |
PROBLEM TO BE SOLVED: To provide aluminum foil for an electrolytic capacitor electrode in which etch pits uniformly and deeply progress to the inside of aluminum without causing surplus decomposition at the surface and the inside upon AC etching, for obtaining high electrostatic capacitance. SOLUTION: There is disclosed the aluminum foil having a composition comprising 30 to 180 ppm Fe and 30 to 180 ppm Si and having an Al purity of ≥99.93%, wherein the total of the Fe content in the intermetallic compounds with the major axis of 0.1 to 1 μm, of intermetallic compounds present in the foil, is 13 to 30 ppm, and the content of Fe present as intermetallic compounds is ≥50% of the Fe content in the foil. COPYRIGHT: (C)2010,JPO&INPIT
|
