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A kind of manufacturing method of high dielectric constant composite oxide film electrode foil

A composite oxide film, high dielectric constant technology, applied in capacitor electrodes, electrolytic capacitors, circuits, etc., can solve the problems of low specific volume of products and low conversion rate of specific volume of output foil, and achieve the effect of simple and easy control.

Active Publication Date: 2018-07-31
NANTONG HAIXING ELECTRONICS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this traditional production process, after the corroded foil is put into production to the formation process, the specific volume conversion rate of the output foil is low, and the specific volume of the product is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Step 1: Mix n-butyl titanate and ethylene glycol methyl ether at a volume ratio of 1:3, and conduct a chelation reaction at 40°C for 12 hours, and then add pure water to adjust the concentration of the solution to 0.1mol / L;

[0015] Step 2: Put the aluminum foil that has been corroded by surface expansion into a stainless steel tank filled with the 50°C gel solution obtained in step 1, connect the aluminum foil to the negative electrode, and connect the stainless steel tank to the positive electrode, apply a 5V DC voltage, and conduct electrodeposition at a current density of 30mA / cm² 0.5min;

[0016] Step 3: Dry the aluminum foil treated in step 2 in an air atmosphere at 100°C for 3 minutes;

[0017] Step 4: heat-treat the aluminum foil treated in step 3 at 400° C. for 1 hour in a nitrogen atmosphere under a pressure of 1 atm;

[0018] Step 5: put the aluminum foil treated in step 4 into the chemical production process normally.

Embodiment 2

[0020] Step 1: Mix n-butyl titanate and ethylene glycol methyl ether at a volume ratio of 1:5, and conduct a chelation reaction at 80°C for 24 hours, and then add pure water to adjust the concentration of the solution to 1mol / L;

[0021] Step 2: Put the aluminum foil that has been corroded by surface expansion in a stainless steel tank filled with the 70°C gel solution obtained in step 1, connect the aluminum foil to the negative electrode, and connect the stainless steel tank to the positive electrode, apply a DC voltage of 10V, and conduct electrodeposition at a current density of 60mA / cm² 2min;

[0022] Step 3: Dry the aluminum foil treated in step 2 in an air atmosphere at 200°C for 5 minutes;

[0023] Step 4: heat-treat the aluminum foil treated in step 3 at 600°C for 24 hours in a nitrogen atmosphere under a pressure of 3 atm;

[0024] Step 5: put the aluminum foil treated in step 4 into the chemical production process normally.

Embodiment 3

[0026] Step 1: Mix n-butyl titanate and ethylene glycol methyl ether at a volume ratio of 1:4, and conduct a chelation reaction at 60°C for 18 hours, and then add pure water to adjust the concentration of the solution to 0.5mol / L;

[0027] Step 2: Put the aluminum foil that has been etched by surface expansion into a stainless steel tank filled with the 60°C gel solution obtained in step 1, connect the aluminum foil to the negative electrode, and connect the stainless steel tank to the positive electrode, apply a DC voltage of 8V, and conduct electrodeposition at a current density of 45mA / cm² 1min;

[0028] Step 3: Dry the aluminum foil treated in step 2 in an air atmosphere at 150°C for 4 minutes;

[0029] Step 4: heat-treat the aluminum foil treated in step 3 at a high temperature of 500° C. for 12 hours in a nitrogen atmosphere under a pressure of 2 atm;

[0030] Step 5: put the aluminum foil treated in step 4 into the chemical production process normally.

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PUM

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Abstract

The invention discloses a manufacturing method of a high-dielectric-constant composite oxide film electrode foil. The method comprises the following steps that the aluminum foil subjected to surface expansion corrosion is prepared; in a 50 to 70 DEG C tetrabutyl titanate and ethylene glycol monomethyl ether mixed system prepared by a collosol-gel method, electro-deposition is performed for 0.5 to 2 minutes at the direct current voltage being 5 to 10V and the current density being 30 to 60mA / cm<2>; drying is performed for 3 to 5 minutes at the air atmosphere of 100 to 200 DEG C; 400 to 600 DEG C high-temperature treatment is performed for 1 to 24h in a protection gas atmosphere state under the pressure of 1 to 3atm; forming production is performed. The method has the advantages that the method is simple and is easy to control; the existing corrosion and formed foil production process is not influenced; compared with the foil produced by the traditional process, the produced foil treated by the process has the advantage that the specific volume is improved by 20 percent or higher.

Description

Technical field: [0001] The invention relates to an intermediate treatment method for electrode foils for capacitors, and is especially suitable for the production process of electrode foils for low-voltage aluminum electrolytic capacitors. Background technique: [0002] At present, the manufacturing method of electrode foil for aluminum electrolytic capacitors is as follows: aluminum foil after surface expansion corrosion→drying in air atmosphere at 100~200°C for 3~5min→chemical conversion production. In this traditional production process, after the corroded foil is put into production to the chemical formation process, the specific volume conversion rate of the output foil is low, and the specific volume of the product is low. Invention content: [0003] The object of the present invention is to overcome above-mentioned deficiencies and provide a kind of manufacturing method of high dielectric constant composite oxide film electrode foil, under the situation that surfac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042H01G9/045H01G9/055
CPCH01G9/04H01G9/042H01G9/045H01G9/055
Inventor 严季新陈健王建中朱鸿伟
Owner NANTONG HAIXING ELECTRONICS