Manufacturing method for raising specific volume of electrode foil in use for aluminium electrolytic capacitor

A technology for aluminum electrolytic capacitors and manufacturing methods, applied in the direction of electrolytic capacitors, capacitor manufacturing, capacitors, etc., can solve the problem of low electrode foil capacity, achieve high product quality, reasonable technology, and increase the effect of specific capacitance

Inactive Publication Date: 2006-12-06
NANTONG HAIXING ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the pre-treatment method of medium-pressure chemical formation wa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0011] Example one:

[0012] Take the corroded aluminum foil for medium pressure, with a purity of 99.99%, immerse it in pure water above 95 degrees for 6 minutes, then soak it in 0.5% 60 degrees phosphoric acid solution for 5 minutes, then in 1.2% ammonium adipate And 4% boric acid in 85℃ aqueous solution, the applied current density is 50mA / cm 2 , 350V voltage for formation, after 28 minutes of constant voltage, high temperature heat treatment at 450°C for 4 minutes, and then in an aqueous solution of 1.2% ammonium adipate and 4% boric acid at 90°C, the applied current density is 50mA / cm 2 , 350V voltage is formed, and the constant voltage ends after 12 minutes.

Example Embodiment

[0013] Embodiment two:

[0014] Take the corroded aluminum foil for medium pressure with a purity of 99.99%, soak it in pure water above 95 degrees for 6 minutes, then soak it in a 0.1% 40 degree phosphoric acid solution for 1 minute, and then in 0.5% ammonium adipate And 3% boric acid in 60℃ aqueous solution, the applied current density is 50mA / cm 2 , 350V voltage for chemical conversion, constant voltage for 20 minutes, and then through 350 ℃ high temperature heat treatment for 3 minutes, then in 0.5% ammonium adipate and 3% boric acid 60 ℃ aqueous solution, the applied current density is 50mA / cm 2 , 350V voltage is formed, and the constant voltage will end after 10 minutes.

Example Embodiment

[0015] Embodiment three:

[0016] Take the corroded aluminum foil for medium pressure, with a purity of 99.99%, immerse it in pure water above 95 degrees for 6 minutes, then soak in 5% 90 degrees phosphoric acid solution for 10 minutes, and then in 3% ammonium adipate And 10% boric acid 90℃ aqueous solution, the applied current density is 50mA / cm 2 , 350V voltage for chemical conversion, after 30 minutes of constant voltage, heat treatment at 500°C for 5 minutes, then in 3% ammonium adipate and 10% boric acid in an aqueous solution of 90°C, the applied current density is 50mA / cm 2 , 350V voltage for formation, the constant voltage will end after 15 minutes.

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PUM

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Abstract

The disclosed preparation method for increasing specific volume of electrode foil in use for aluminum electrolytic capacitor includes following steps: carrying out hydration for medium pressure corrosion aluminum foil in pure water at temperature 95 deg.C or higher; dipping hydrated aluminum foil in 0.1-5% solution of phosphoric acid at temperature 40-80 deg.C; then, carrying out two times of reduction in water solution containing 0.5-3% ammonium adipic acid, and 3-10% boric acid at temperature 60-90 deg.C; after first reduction, process at constant pressure for 20-30 minutes, and through treatment at high temperature at temperature 350-500 deg.C; after second reduction, process at constant pressure for 10-15 minutes. Useful effects are: reasonable technique, high quality of products, and raised 4-10% specific volume for electrode foil produced.

Description

Technical field: [0001] The invention relates to a production method of electronic components, in particular to a production method of an electrode foil for an aluminum electrolytic capacitor, specifically, a production method for increasing the specific capacity of an electrode foil for an aluminum electrolytic capacitor. Background technique: [0002] The manufacturing method of electrode foil for aluminum electrolytic capacitor is to form a layer of dense oxide film on the surface of aluminum foil by electrochemical method, which is used as the working medium of capacitor. In the past, the pre-treatment method of medium-pressure chemical formation was hydration in pure water, and the capacity of the electrode foil made was low. Invention content: [0003] The object of the present invention is to provide a manufacturing method for improving the specific volume of the electrode foil for aluminum electrolytic capacitors with reasonable process and high product quality, an...

Claims

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Application Information

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IPC IPC(8): H01G9/00H01G9/055H01G13/00B21D33/00C25D11/00
Inventor 张台华张传超王建中
Owner NANTONG HAIXING ELECTRONICS
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