Production method of special aluminum foil for solid-state capacitor

Abstract

The invention discloses a production method of a special aluminum foil for a solid-state capacitor. The production method comprises the following steps:1), adding an aluminum foil into an ammonium adipate solution for performing forming treatment to obtain the primarily-formed aluminum foil; 2), performing secondary forming treatment; 3), performing trinary forming treatment; 4), adding the trinarily-formed aluminum foil into a phosphoric acid solution for performing depolarization treatment; 5), performing primary repairing forming treatment; 6), performing secondary repairing forming treatment; 7), posttreating; 8), putting the posttreated aluminum foil into a roasting furnace for performing roasting treatment, putting the roasted aluminum foil into a drying furnace for performing drying treatment to obtain the special aluminum foil. The special aluminum foil produced by the production method has the characteristics of high specific capacity, long service life, long hydration-resisting time and low drain voltage.

Description

technical field [0001] The invention relates to a production method of aluminum foil, in particular to a production method of special aluminum foil for solid capacitors. Background technique [0002] The full name of solid capacitors is: solid aluminum electrolytic capacitors. The biggest difference between it and ordinary capacitors (that is, liquid aluminum electrolytic capacitors) is that different dielectric materials are used. The dielectric material of liquid aluminum capacitors is electrolyte, while the dielectric material of solid capacitors is conductive polymer materials. The aluminum quality of the solid aluminum electrolytic capacitor in the prior art is difficult to reduce the leakage voltage of the solid capacitor and the yield rate of the capacitor is low. As one of the main raw materials of the solid capacitor, the quality and stability of the aluminum foil film directly affect to the service life of the capacitor. Because in the process of chemical formati...

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Problems solved by technology

The aluminum quality of the solid aluminum electrolytic capacitor in the prior art is difficult to reduce the leakage voltage of the solid capacitor and the yield rate of the capacitor is low. As one of the main raw materials of the solid capacitor, the quality and stability of the aluminum foil film directly affect to the service life of the capacitor

Because in the chemical formation process, the quality of the process and production conditions will affect the stability of the film, solid aluminum is mostly made of high specific volume aluminum foil, the price of aluminum foil is high, the current market demand is large, but the quality is not good, which will lead to the cost of capacitors increased

In addition, the production conditions of the existing technology are difficult to meet the requirements of this solid capacitor, and the leakage voltage is relatively large

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