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A method of chemical formation of aluminum electrode foil resistant to large ripple current

A technology of aluminum electrode foil and chemical formation method, which is applied in circuits, capacitors, electrical components, etc., to achieve the effect of dense oxide film

Active Publication Date: 2017-01-04
新疆海源储能材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in some high-reliability occasions, these two process products cannot fully meet the needs

Method used

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  • A method of chemical formation of aluminum electrode foil resistant to large ripple current
  • A method of chemical formation of aluminum electrode foil resistant to large ripple current
  • A method of chemical formation of aluminum electrode foil resistant to large ripple current

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Embodiment Construction

[0012] A method for forming an aluminum electrode foil resistant to large ripple current is characterized in that it is realized according to the following steps:

[0013] Step 1: Soak the corroded foil in deionized water at 90-100°C for 8-12 minutes;

[0014] Step 2: The anode foil is formed in a formation tank equipped with a 1-3‰ phosphoric acid solution, and is sequentially formed through the 1st, 2nd, 3rd, and 4th formation tanks;

[0015] Step 3: Use an oven at 450-550°C to perform high-temperature treatment on the anode foil, and the residence time is 2-3 minutes;

[0016] Step 4: The anode foil is formed for the 5th and 6th times in the formation tank equipped with 6-10% boric acid solution;

[0017] Step 5: again using an oven at 450-550° C. to perform high-temperature treatment on the anode foil; the residence time is 2-3 minutes.

[0018] The temperature in step 1 was 95°C.

[0019] Step 2: The anode foil is formed for the first to fourth times in a 2‰ phosphoric...

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Abstract

A method for forming an aluminum electrode foil resistant to large ripple currents is realized according to the following steps: 1: soak the corroded foil in deionized water at 90-100°C for 8-12 minutes; 2: anode foil is placed in a 1 ~3‰ phosphoric acid solution in the chemical conversion tank, sequentially through the first, second, third, fourth chemical conversion tank; 3: Use an oven at 450-550°C to perform high-temperature treatment on the anode foil, and the residence time is 2-3 minutes ;4: The anode foil is formed for the 5th and 6th times in the formation tank equipped with 6-10% boric acid solution; 5: The anode foil is subjected to high-temperature treatment in an oven at 450-550°C again; the residence time is 2-3 minutes . The method of the invention adopts the combination process of phosphoric acid and boric acid, and the manufactured aluminum electrode foil is 20% higher than the existing aluminum electrode foil in the case of the same withstand voltage.

Description

technical field [0001] The invention belongs to the technical field of manufacturing electrode foils of aluminum electrolytic capacitors, and in particular relates to a method for forming electrode foils. Background technique [0002] The core material for the manufacture of aluminum electrolytic capacitors is aluminum electrode foil, and the aluminum electrode foil formed by different chemical formation process systems will ultimately determine the various characteristics of the capacitor. The existing chemical formation technologies can be roughly divided into two categories: 1. Mixed acid chemical process system; 2. Boric acid process chemical process system. The mixed acid formation process system is characterized by high strength and high specific volume, but its service life is worse than that of the boric acid formation process system. The characteristics of the boric acid conversion process are: long life, low loss, but relatively poor strength. The two chemical fo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/055H01G13/00
Inventor 朱志炎万峰
Owner 新疆海源储能材料有限公司