| 摘要 |
PURPOSE:To improve the electrostatic capacity of an Al foil without lowering the characteristics such as strength, etc., by specifying Si content for Fe content in Al to the specific range and regulating Ti content. CONSTITUTION:The titled foil is formed by the compsn. in which the Si content is regulated to 1.0-2.0 times the Fe content and the Ti content is regulated to <=0.001wt.%. Said Al alloy foil can be obtd. by melting primary electrolytic Al ground metal having about 540-560ppm Fe content and having about 99.8% Al purity, adding specific amounts of Si and Ti to the alloy, casting an Al alloy slab and executing foiling, etc., thereto. By the above-mentioned compsn., the potential difference between the Al matrix and the deposition in the matrix is increased and, as a result, the electrostatic capacity of the Al foil after etching can be increased.
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