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Method for mfg negative electrode foil of aluminium electrolytic capacitor

A technology of aluminum electrolytic capacitors and manufacturing methods, which is applied in the direction of capacitor manufacturing, electrolytic capacitors, capacitors, etc., can solve the problems of aluminum foil initial specific volume attenuation, and achieve the effects of reducing surface damage and improving specific volume and surface quality

Inactive Publication Date: 2004-03-24
深圳市东阳光化成箔股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two treatment processes for the negative electrode foil are all treated after the corrosion process, which will cause serious attenuation of the initial specific volume of the aluminum foil

Method used

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Examples

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Embodiment 1

[0008] Embodiment 1 of the present invention: a method for manufacturing and treating the negative electrode foil of an aluminum electrolytic capacitor. The process flow is: pretreatment→water washing→corrosion→water washing→sintering→water washing→intermediate treatment→water washing→post-treatment→drying. The aluminum foil used is a domestic 50um aluminum foil with a purity ≥ 97%, and its specific volume before medium treatment is 1000μF / cm 2 . This process is to increase the burning treatment of the foil after the original etching process, and then carry out the intermediate treatment and post-treatment of the foil after the burning treatment. The technological conditions of the pretreatment, corrosion, intermediate treatment, posttreatment and drying processes of this process are the same as those of the pretreatment, corrosion, intermediate treatment, posttreatment and drying procedures in the comparative example. The flake treatment was carried out in a hot oven at a te...

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Abstract

This invention relates to a method for manufacturing cathode foils of aluminium electrolytic condensers including corrosion, middle treatment and post treatment characterizing in the technical process: pretreatmentí·corrosioní·burnetí·middle treatmentí·post treatmentí·dried. The burning is done in a dry oven under 300-550deg.c, for 30-80sec. forming and oxide film on the A1 foil surface and solidifying the surface holes eroded on the foil for reducing damage to the surface of the negative foil. Premiddle treatment can beaded after corrosion and before burning, the solution can be applied with0.5~0.9mol / L HNO3 under 28-35deg.c for 25-50sec.

Description

Technical field [0001] The invention relates to a method for manufacturing negative electrode foil for aluminum electrolytic capacitors, in particular to a method for processing the negative electrode foil during the manufacturing process of the aluminum electrolytic capacitor negative electrode foil. Background technique [0002] With the development of modern information technology, aluminum electrolytic capacitors are widely used in electronics, instruments, communications, measurement, computers, and aerospace technology. People have higher requirements for electrolytic capacitors. Negative electrode foil is one of the key materials for manufacturing electrolytic capacitors. , Continuously improving the specific volume of the negative electrode foil and improving the surface quality are the goals pursued by people. In the existing manufacturing process of negative electrode foil, the treatment of negative electrode foil generally adopts the process of corrosion→intermedi...

Claims

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Application Information

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IPC IPC(8): H01G9/055
Inventor 冉亮
Owner 深圳市东阳光化成箔股份有限公司
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