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Preparation method for high-dielectric-constant formed aluminum foil

A high-dielectric-constant, aluminum-foil-forming technology, used in circuits, capacitors, anodizing, etc., can solve the problems of poor controllability, low dielectric constant and small specific capacity of finished aluminum electrode foils, and achieve higher specific capacity, improved Small relative dielectric constant and obvious effect of increasing capacity

Active Publication Date: 2016-06-22
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In short, the problems existing in the prior art are: the controllability of the production process is poor, the dielectric constant of the finished aluminum electrode foil is low, and the specific capacity is small

Method used

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  • Preparation method for high-dielectric-constant formed aluminum foil
  • Preparation method for high-dielectric-constant formed aluminum foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (11) Alkaline cleaning: The corroded foil used is cleaned in 1.0M sodium hydroxide solution for 60s.

[0051] (12) Pickling: Soak the above-mentioned corroded foil after alkali washing in a mixed acid solution of 1.0M hydrochloric acid and 3.0M sulfuric acid for 100s.

[0052] (13) Ultrasonic cleaning: the above-mentioned corroded foil after alkali cleaning was soaked in deionized water for 150s under ultrasonic conditions of ultrasonic power of 300W and ultrasonic frequency of 28kHz.

[0053] (20) Electrodeposition: immerse the above-mentioned corroded foil after a series of cleaning steps in a solution containing (NH 4 ) 2 [TiO(C 2 o 4 ) 2 ] and (COOH) 2 The electrochemical deposition is carried out in the deposition tank of the mixed solution. The electrodeposition solution consists of 0.005M (NH 4 ) 2 [TiO(C 2 o 4 ) 2 ] and 0.001M of (COOH) 2 Mix composition, by adding NH dropwise 4 OH to adjust the pH of the mixture to 4. The above-mentioned treated c...

Embodiment 2

[0058] (11) Alkaline cleaning: The corroded foil used is cleaned in 1.0M sodium hydroxide solution for 60s.

[0059] (12) Pickling: Soak the above-mentioned corroded foil after alkali washing in a mixed acid solution of 1.0M hydrochloric acid and 3.0M sulfuric acid for 100s.

[0060] (13) Ultrasonic cleaning: the above-mentioned corroded foil after alkali cleaning was dipped in a deionized water medium for 150s under ultrasonic conditions of ultrasonic power of 300W and ultrasonic frequency of 28kHz.

[0061] (20) Electrodeposition: immerse the above-mentioned corroded foil after a series of cleaning steps in a solution containing (NH 4 ) 2 [TiO(C 2 o 4 ) 2 ] and (COOH) 2 The electrochemical deposition is carried out in the deposition tank of the mixed solution. The electrodeposition solution consists of 0.01M (NH 4 ) 2 [TiO(C 2 o 4 ) 2 ] and 0.001M of (COOH) 2 Mix composition, by adding NH dropwise 4 OH to adjust the pH of the mixture to 4. The above-mentioned t...

Embodiment 3

[0066] (11) Alkaline cleaning: The corroded foil used is cleaned in 1.0M sodium hydroxide solution for 60s.

[0067] (12) Pickling: Soak the above-mentioned corroded foil after alkali washing in a mixed acid solution of 1.0M hydrochloric acid and 3.0M sulfuric acid for 100s.

[0068] (13) Ultrasonic cleaning: the above-mentioned corroded foil after alkali cleaning was dipped in a deionized water medium for 150s under ultrasonic conditions of ultrasonic power of 300W and ultrasonic frequency of 28kHz.

[0069] (20) Electrodeposition: immerse the above-mentioned corroded foil after a series of cleaning steps in a solution containing (NH 4 ) 2 [TiO(C 2 o 4 ) 2 ] and (COOH) 2 The electrochemical deposition is carried out in the deposition tank of the mixed solution. The electrodeposition solution consists of 0.01M (NH 4 ) 2 [TiO(C 2 o 4 ) 2 ] and 0.005M (COOH) 2 Mix composition, by adding NH dropwise 4 OH to adjust the pH of the mixture to 4. The above-mentioned trea...

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Abstract

The invention discloses a preparation method for a high-dielectric-constant formed aluminum foil. The preparation method comprises the following steps of (10): raw material cleaning: performing alkali washing, acid washing and ultrasonic washing on a to-be-processed corroded foil to obtain corroded foil with the clean surface; (20) electrodeposition: immersing the corroded foil with the clean surface into a deposition solution to be subjected to electrochemical deposition; (30) drying: drying the corroded foil after the corroded foil is subjected to electrochemical deposition; (40) high-temperature annealing: performing high-temperature annealing on the dried corroded foil; and (50) positive electrode formation: performing positive electrode formation processing by putting the high-temperature-annealed corroded foil in a formation solution to obtain the formed aluminum foil. The preparation method for the formed aluminum foil has a controllable production process, high aluminium electrode foil dielectric constant and high specific capacity.

Description

technical field [0001] The invention belongs to the technical field of electrodeposition technology of electronic materials, in particular to a preparation method of high dielectric constant aluminum foil with controllable production process, high dielectric constant of aluminum electrode foil and large specific capacity. Background technique [0002] With the rapid development of the electronics industry, the demand for aluminum electrolytic capacitors has risen sharply, and the development trend of miniaturization, chip type, high temperature resistance and long life has become increasingly obvious. Under the premise of not changing the volume of the aluminum electrolytic capacitor, the fundamental technical ways to increase the specific capacity include: enlarging the surface area S of the anode foil, increasing the relative permittivity of the dielectric, and reducing the thickness of the dielectric layer. In recent years, with the development of corrosion surface expans...

Claims

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Application Information

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IPC IPC(8): H01G9/055H01G9/045C25D9/06C25D11/04
CPCC25D9/06C25D11/04H01G9/045H01G9/055
Inventor 张淮浩胡斌尹必跃赵静马坤松朱德秋
Owner YANGZHOU UNIV
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