Patent ID: 9142359
Filing Date: 2015-09-22
Classification: H01G

Abstract:
1. A method for producing a medium- to high-voltage aluminum electrolytic capacitor including an electrode and an electrolyte, wherein an electrode material for the electrode is produced by a method comprising the steps of: Step (1): forming a film made from a composition comprising a powder of at least one of aluminum and an aluminum alloy on a substrate; and Step (2): sintering the film at a temperature not lower than 560° C. and not higher than 660° C. so that particles of the powder of at least one of aluminum and an aluminum alloy maintain a space between each particle; the method being free from an etching treatment, the method comprising a degreasing treatment after Step (1) and prior to Step (2), at a temperature within a range of not lower than 100° C. to not higher than 600° C. and the temperature is maintained for not less than 5 hours, and a porosity of the resulting sintered body is determined by a target electrostatic capacity, and is not less than 10%, and the powder having an average particle diameter of not less than 1 μm and not more than 80 μm, wherein the porosity is controlled by controlling a particle diameter of the powder of at least one of aluminum and an aluminum alloy.