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Preparation method of high-dielectric-constant composite anode oxide film

A high dielectric constant, composite anode technology, applied in the direction of electrolytic coating, surface reaction electrolytic coating, coating, etc., can solve the problems of hindering the introduction of materials and limited improvement of specific capacitance, so as to reduce electrostatic repulsion, increase specific capacitance, The effect of promoting the development of miniaturization and weight reduction

Pending Publication Date: 2021-11-30
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, during the deposition process, the electrostatic repulsion existing between the material and the aluminum foil hinders the introduction of the material, resulting in limited improvement in the specific capacitance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing a high dielectric constant composite anodized film, comprising the following steps:

[0024] Step 1: Spread the mixed powder on the substrate aluminum foil, and hot-roll the mixed powder and the substrate aluminum foil together, the mixed powder is composed of aluminum powder and a solid binder of the powder; the hot-rolled Stand the aluminum foil at 300-500°C for 2-5 hours; put the aluminum foil after standing in an inert gas environment at 550-650°C, and sinter for 5-40 minutes to obtain an anode foil.

[0025] Step 2: Dissolve 0.05-0.3 grams of polyvinyl alcohol (PVA) and polylactic acid (PLA) in 1 liter of deionized water at 70-90 ° C, the ratio of polyvinyl alcohol (PVA) and polylactic acid (PLA) is 1:1, and simultaneously stirred for 4 hours; the resulting solution was naturally cooled to room temperature, and further stirred for 10 hours to obtain a modified solution;

[0026] Put the anode foil obtained in step 1 into step Surface m...

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PUM

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Abstract

The invention discloses a preparation method of a high-dielectric-constant composite anode oxide film. The preparation method comprises the following steps: carrying out surface modification on an anode foil; preparing titanium-containing sol by using a sol-gel method; coating the titanium-containing sol on the anode foil by using a vacuum permeation device; and finally, preparing the composite anode oxide film used in the aluminum electrolytic capacitor through formation. Compared with a traditional process, the composite anode oxide film obtained through the method has the advantages that the specific capacitance is greatly improved; and an aluminum electrolytic capacitor can be effectively promoted to develop towards the miniaturization and light weight direction.

Description

technical field [0001] The invention relates to an aluminum electrolytic capacitor, in particular to a method for preparing a high dielectric constant composite anodic oxide film. Background technique [0002] As one of the indispensable components in electronic products, aluminum electrolytic capacitors are widely used in electronic products such as information electronics, instruments and meters, and electromechanical appliances. With the rapid development of the information industry and the integration, miniaturization and light weight of electrical products, it is urgent to increase the specific capacitance of the anode aluminum foil of aluminum electrolytic capacitors to achieve the purpose of reducing the volume of aluminum electrolytic capacitors and increasing their electrostatic capacity. [0003] Among them, increasing the relative dielectric constant of the oxide film is one of the ways to increase the specific capacitance of the aluminum electrolytic capacitor. ...

Claims

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Application Information

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IPC IPC(8): C25D11/16C25D11/10C25D11/18
CPCC25D11/16C25D11/10C25D11/18
Inventor 贾明刘晓明刘一民张茂贵刘芳洋蒋良兴
Owner CENT SOUTH UNIV