Method for preparing water proof aluminum electric pole foil

An aluminum electrode foil, hydration-resistant technology, applied in circuits, capacitors, electrolytic coatings, etc., can solve the problems of excellent anti-hydration treatment effect of aluminum anodic oxide film

Inactive Publication Date: 2009-06-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above three Japanese patented technologies have not been widely used in the industry due to various reasons, and their actual effects are not as good as the current industrially used ammonium dihydrogen phosphate (ADP)-based hydration-resistant treatment agent. Anti-hydration treatment of aluminum anodized film is excellent

Method used

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  • Method for preparing water proof aluminum electric pole foil
  • Method for preparing water proof aluminum electric pole foil
  • Method for preparing water proof aluminum electric pole foil

Examples

Experimental program
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Effect test

Embodiment 1

[0025] After the aluminum corroded foil is subjected to conventional anodic oxidation (formation), the formed foil is immersed in a solution of diethylenetriaminepentamethylenephosphonic acid for hydration resistance treatment. The concentration of the solution of diethylenetriaminepentamethylenephosphonic acid is 0.002mol / L, adjust the pH of the solution to 6.0, control the temperature of the solution to 80° C., and immerse the formed foil in the above-mentioned diethylenetriaminepentamethylenephosphonic acid solution for 4 minutes.

[0026] Through the temperature-controlled heat treatment of the ground temperature section and the high temperature section, the temperature of the low temperature section is controlled at 80°C, and the treatment time is 8 minutes; the temperature of the high temperature section is controlled at 450°C, and the treatment time is 6 minutes. The reaction between the aluminum oxide film and the diethylenetriaminepentamethylene phosphonic acid is ful...

Embodiment 2

[0031] Sodium ethylenediamine tetramethylene phosphonate solution is soaked into hydration resistance treatment, the concentration of sodium ethylenediamine tetramethylene phosphonate solution is 0.01mol / L, the pH value of the solution is adjusted to 6.5, and the pH value of the solution is controlled. The temperature is 50°C, and the immersion time of the chemically formed foil in the above-mentioned sodium ethylenediamine tetramethylene phosphonate solution is 8 minutes.

[0032] In the temperature-controlled heat treatment process, the temperature of the low-temperature section is controlled at 120°C, and the treatment time is 6 minutes; the temperature of the heat treatment at the high-temperature section is controlled at 500°C, and the treatment time is 3 minutes.

[0033] Using the above process steps, the hydration-resistant treatment of the formed foil for domestic low-voltage aluminum electrolytic capacitors was carried out, and the boosting time T of the oxide film af...

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Abstract

A preparation method of a hydration resistant aluminum electrode foil belongs to the technical field of electronic materials, and relates to the preparation method of an aluminum electrode foil in an aluminum electrolytic capacitor. The preparation method is realized according to a technical thought of inhibiting a 'wet electronic state' effect of an oxide film on the surface of the aluminum electrode foil to improve the hydration resistance of the aluminum electrode foil. The preparation method specifically comprises the following steps: soaking anodized aluminum electrode foil in organic phosphoric acid or an organic phosphonate solution containing a plurality of phospho structures, and then heating by temperature control to obtain the aluminum electrode foil with the high hydration resistance. A used hydration resistant treating agent can be intensively bonded on the surface of aluminum oxide and occupy active points of the surface, thus well inhibiting generation of the 'wet electronic state' effect and finally improving the hydration resistance of the aluminum electrode foil. The preparation method is realized completely in an aqueous solution system, has simple application equipment and short processing time, is compatible with the chemosynthesis line in the existing industry and can be directly merged into the chemosynthesis line in the existing industry.

Description

technical field [0001] The invention belongs to the technical field of electronic materials and relates to a preparation method of aluminum electrode foil in an aluminum electrolytic capacitor. technical background [0002] Because liquid aluminum electrolytic capacitors have the advantages of high capacity per unit volume ratio and low cost, they are currently widely used in various national defense and civilian information acquisition and processing, instrumentation and other electronic complete machines. Key basic electronic components. The core component of the aluminum electrolytic capacitor is the aluminum electrode foil, and the aluminum anodized film obtained by anodizing on the surface of the aluminum electrode foil is the key material for the formation of the capacitance characteristics of the aluminum electrolytic capacitor. High specific volume and long life are the general trend of the development of aluminum electrode foil technology. [0003] The actual catho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/24H01G9/045H01G9/055
Inventor 冯哲圣陈金菊夏英杰党智勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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