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Method for reducing electric leakage of formed aluminum foil

A technology of forming aluminum foil and aluminum foil, which is applied in circuits, capacitors, electrolytic coatings, etc., can solve the problems of stable performance of hydrated alumina film, and achieve the effects of easy industrial production, simple process control, and improved quality

Inactive Publication Date: 2019-10-29
XINJIANG JOINWORLD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its disadvantage is that after the formation of a hydrated oxide film with a large number of defects, the pretreatment step can only change the hydrated oxide film on the surface, which is not as stable as directly growing a dense hydrated aluminum oxide film.

Method used

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  • Method for reducing electric leakage of formed aluminum foil
  • Method for reducing electric leakage of formed aluminum foil
  • Method for reducing electric leakage of formed aluminum foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of concrete operation of the present invention is as follows:

[0042] Take corroded aluminum foil raw materials, in which the Al purity is ≥99.99%, add 1g / L mannitol to water to make a water-mannitol solution, boil the corroded aluminum foil in the water-mannitol solution at 80°C for 10 minutes, and heat it at 60°C At a certain temperature, the aluminum foil is sequentially subjected to primary formation, secondary formation, tertiary formation, fourth-level formation, fifth-level formation, roasting treatment, intermediate treatment, cleaning, post-treatment, drying and other processes.

[0043] The leakage test was carried out on the obtained formed foil. The instrument used in the test was a TV1000 aluminum foil electrical performance tester. The results are shown in figure 2 , after 1200s leakage test, the leakage current is about 68μA.

Embodiment 2

[0045] Another specific operation of the present invention is as follows:

[0046] Take corroded aluminum foil raw materials, in which the Al purity is ≥99.99%, add 6g / L mannitol to water to make a water-mannitol solution, boil the corroded aluminum foil in the water-mannitol solution at 90°C for 10 minutes, and heat it at 85°C At a certain temperature, the aluminum foil is sequentially subjected to primary formation, secondary formation, tertiary formation, fourth-level formation, fifth-level formation, roasting treatment, intermediate treatment, cleaning, post-treatment, drying and other processes.

[0047] The leakage test was carried out on the obtained formed foil. The instrument used in the test was a TV1000 aluminum foil electrical performance tester. The results are shown in image 3 , after 1200s leakage test, the leakage current is about 65μA.

Embodiment 3

[0049] Another specific operation of the present invention is as follows:

[0050]Take corroded aluminum foil raw materials, in which the Al purity is ≥99.99%, add 12g / L mannitol to water to make a water-mannitol solution, boil the corroded aluminum foil in the water-mannitol solution at 100°C for 10 minutes, and then heat it at 100°C At a certain temperature, the aluminum foil is sequentially subjected to primary formation, secondary formation, tertiary formation, fourth-level formation, fifth-level formation, roasting treatment, intermediate treatment, cleaning, post-treatment, drying and other processes.

[0051] The leakage test was carried out on the obtained formed foil. The instrument used in the test was a TV1000 aluminum foil electrical performance tester. The results are shown in Figure 4 , After 1200s leakage test, the leakage current is about 70μA.

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Abstract

The invention discloses a method for reducing electric leakage of a formed aluminum foil, and relates to the field of aluminum foil machining and production. According to the adopted technical scheme,the method mainly comprises the following steps that the corroded aluminum foil is put into an alcohol solution for water boiling treatment, and then the aluminum foil sequentially undergoes multistage formation, baking treatment, intermediate treatment, cleaning, post treatment and drying. According to the method, a compact oxidation film is directly grown on the surface of the aluminum foil, the electric leakage of the formed aluminum foil is reduced, and the service life of the aluminum foil product is prolonged.

Description

technical field [0001] The invention relates to the field of processing and production of aluminum foil, in particular to a method for reducing leakage of chemically formed aluminum foil. Background technique [0002] Nowadays, household appliances are developing towards miniaturization and portability, requiring aluminum electrolytic capacitors to be as small as possible, so high-capacity anode aluminum foils are urgently needed. At present, in addition to increasing the capacity of corroded foil, the capacity of formed foil can also be increased by using organic acid process, but the formed foil produced by organic acid process generally has a large leakage current, so it is particularly important to find effective ways to reduce leakage. [0003] At present, the production process of formed foil for aluminum electrolytic capacitors is as follows: the corroded foil is boiled, then multi-stage formed, oven or phosphoric acid destroyed, and formed again. The formed foil obt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/16C25D11/12H01G13/00
CPCC25D11/12C25D11/16H01G13/00
Inventor 游彭飞林颖黄予涵王兰东李帅帅张学宽汪鑫陈小元
Owner XINJIANG JOINWORLD CO LTD
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