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Chemical forming solution, chemical forming method and anode foil

A chemical formation method and chemical liquid technology, which are applied in anodizing, electrolytic capacitors, coatings, etc., can solve problems such as reducing specific volume, and achieve the effects of increasing specific volume, strengthening the bonding force of oxide film, and reducing the amount of oxygen.

Active Publication Date: 2021-11-05
DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a chemical formation solution and a chemical formation process suitable for laminated foils, which can well solve the existing technical problem of specific volume reduction after laminated foils are formed

Method used

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  • Chemical forming solution, chemical forming method and anode foil
  • Chemical forming solution, chemical forming method and anode foil
  • Chemical forming solution, chemical forming method and anode foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0146] 1) Pretreatment: use a laminated foil with a thickness of 125 μm, immerse it in a nitric acid solution with a concentration of 5wt.% and a temperature of 50°C, and turn on an ultrasonic wave with a frequency of 60kHz for 4 minutes;

[0147] 2) Boil in water: wash the pre-treated foil and immerse it in pure water at 100°C for 10 minutes;

[0148] 3) Quaternary formation: anodize the boiled foil in an aqueous solution of 5wt.% boric acid + 0.6wt.% ammonium borate + 0.08wt.% ascorbic acid at 85°C with a current density of 30mA / cm 2 , the constant current boost reaches 120V, and the constant voltage is maintained for 6 minutes; then anodic oxidation treatment is performed at 85°C in an aqueous solution of 5wt.% boric acid + 0.4wt.% ammonium borate + 0.06wt.% ascorbic acid, and the current density is 30mA / cm 2 , the constant current boost reaches 320V, and the constant voltage is maintained for 8 minutes; then anodic oxidation treatment is performed at 85°C in an aqueous sol...

Embodiment 2

[0159] 1) Pretreatment: use a laminated foil with a thickness of 125 μm, immerse it in a sodium hydroxide solution with a concentration of 0.5wt.% and a temperature of 50°C, and turn on an ultrasonic wave with a frequency of 40kHz for 4 minutes;

[0160] Steps 2)-12) are the same as in Example 1.

Embodiment 3

[0162] 1) Pretreatment: use a laminated foil with a thickness of 125 μm, immerse it in a nitric acid solution with a concentration of 8wt.% and a temperature of 50°C, and turn on an ultrasonic wave with a frequency of 80kHz for 4 minutes;

[0163] Steps 2)-12) are the same as in Example 1.

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Abstract

The present invention provides a laminated foil chemical conversion solution and chemical conversion method, and an anode foil obtained by the chemical conversion method. The chemical forming method includes: pretreatment; boiling; four-stage chemical forming in a strong reducing agent chemical forming solution; first heat treatment; first immersion; first supplementary forming treatment; second immersion; ; The second heat treatment; the third complementary forming treatment; the third dipping; The strong reducing agent chemical conversion solution is an aqueous solution containing 2-10wt% boric acid, 0.01-1wt% ammonium borate and 0.001-10wt% strong reducing agent, and the anode foil obtained by chemical conversion using the chemical conversion liquid has a high specific volume and is suitable for use in Electrode material for aluminum electrolytic capacitors.

Description

technical field [0001] The present invention relates to the technical field of manufacturing electrode foils for capacitors. Specifically, the present invention relates to a chemical formation solution and a chemical formation method suitable for laminated foils, and an anode foil obtained by the chemical formation method. [0002] technical background [0003] Capacitors are irreplaceable basic components in various electronic products and are widely used in various fields. Aluminum foil is a commonly used electrode material for capacitors. Usually, aluminum foil used as an electrode needs to be etched to form etch pits to increase the specific surface area, and then the surface is anodized to obtain an oxide film that acts as a dielectric. However, the etching treatment is generally carried out in an aqueous hydrochloric acid solution containing nitric acid, phosphoric acid, sulfuric acid, etc., which inevitably pollutes the environment and increases the economic burden of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/08C25D11/12C25D11/16C25D11/18C25D11/20C25D11/24C22F1/04H01G9/045H01G9/055
CPCC22F1/04C25D11/08C25D11/12C25D11/16C25D11/18C25D11/20C25D11/24H01G9/045H01G9/055
Inventor 吴志能周政杨远博彭果戈
Owner DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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