Method for detecting surface topography of aluminum electrode foil of electrolytic capacitor

A technology for electrolytic capacitors and aluminum electrode foils, applied in instruments, measuring devices, and using wave/particle radiation, etc., can solve the problems of not seeing the inner diameter of holes, difficult microscopic shape analysis, and inability to fully and accurately observe the microscopic shape of electrode foils, etc. question

Active Publication Date: 2013-01-16
RUYUAN YAO AUTONOMOUS COUNTY DONGYANGGUANG FORMED FOIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method dissolves the microscopic morphology of different layers at the same time, and the photo has a strong three-dimensional effect, but the inner diameter of the hole cannot be seen, and the microscopic morphology of the electrode foil cannot be fully and accurately observed, and it is even more difficult to conduct a more accurate quantitative analysis of the microscopic morphology

Method used

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  • Method for detecting surface topography of aluminum electrode foil of electrolytic capacitor
  • Method for detecting surface topography of aluminum electrode foil of electrolytic capacitor
  • Method for detecting surface topography of aluminum electrode foil of electrolytic capacitor

Examples

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Embodiment 1

[0041] Such as Figure 4 , which is a schematic diagram of an electron micrograph of the surface of the formed foil of an aluminum electrolytic capacitor obtained in Example 1 of the method of the present invention. In this embodiment, the following operations are performed sequentially on the formed medium and high voltage electrode foils sampled from the formation production line:

[0042] a. Cut a 10mm*110mm sample from the aluminum electrode foil;

[0043] b. Coarse polishing: Use 400# water sandpaper dipped in water for rough polishing for 8 minutes;

[0044] c. Fine polishing: use 2000# water sandpaper dipped in water for fine polishing for 15 minutes;

[0045] d. Fine polishing: polishing with flannel cloth coated with 0.5um particle size diamond grinding paste, the time is 25 minutes;

[0046] e. Polishing with alkaline solution: wash the polished sample and soak it in an alkaline solution mixed with 5% sodium hydroxide and 7‰ sodium phosphate. The temperature condi...

Embodiment 2

[0049] Such as Figure 5 , which is a schematic diagram of an electron micrograph of the surface of the formed foil of an aluminum electrolytic capacitor obtained in Example 2 of the method of the present invention. In this embodiment, the following operations are performed on the chemically formed medium and high voltage electrode foil produced by simulating the chemically formed production line:

[0050] a. Cut a 10mm*110mm sample from the aluminum electrode foil;

[0051] b. Coarse polishing: Use 400# water sandpaper dipped in water for rough polishing for 8 minutes;

[0052] c. Fine polishing: use 2000# water sandpaper dipped in water for fine polishing for 15 minutes;

[0053] d. Fine polishing: polishing with flannel cloth coated with 0.5um particle size diamond grinding paste, the time is 25 minutes;

[0054] e, electrolytic solution polishing, the electrolytic polishing solution is absolute ethanol: perchloric acid = 1: 4, and the current density is 0.1A / cm 2 , the...

Embodiment 3

[0057] Such as Figure 6 , which is a schematic diagram of an electron micrograph of the surface of the chemically formed foil obtained in Example 3 of the method of the present invention. In this embodiment, the aluminum electrolytic capacitors produced by simulating the production line have been formed into medium and high voltage electrode foils, and the following operations are carried out:

[0058] a. Cut a 10mm*110mm sample from the aluminum electrode foil;

[0059] b. Coarse polishing: Use 400# water sandpaper dipped in water for rough polishing for 8 minutes;

[0060] c. Fine polishing: use 2000# water sandpaper dipped in water for fine polishing for 15 minutes;

[0061] d. Fine polishing: polishing with flannel cloth coated with 0.5um particle size diamond grinding paste, the time is 25 minutes;

[0062] e. Double solution polishing: firstly, the polished sample is washed and soaked in a mixed solution of 5% sodium hydroxide and 7‰ sodium phosphate alkaline solutio...

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Abstract

The invention relates to a method for detecting the surface topography of the aluminum electrode foil of an electrolytic capacitor, comprising the steps that mechanical polish-grinding and solution polishing is conducted by alkaline solution and/or acid polishing slurry, after a polish-formed foil is obtained, the foil is put under an electron microscope to be photographed, and an electron microscope image displaying micro holes and an alumina membrane structure are obtained. By using the detecting method of the invention, clear intuitive photos of the micro topography of the electrode foil can be completely obtained, a direct basis for analyzing the influencing factors of the specific volume of the electrode foil accurately and quantitatively is provided, and therefore, reliable experimental data and guidance are provided for deeply researching and developing the technology of the electrolytic capacitor and process control on actual production lines.

Description

technical field [0001] The invention relates to the manufacturing technology of aluminum electrolytic capacitors, more specifically, the invention relates to a method for detecting and manufacturing aluminum electrode foils of aluminum electrolytic capacitors. Background technique [0002] The production of aluminum electrode foil for aluminum electrolytic capacitors is mainly divided into two major processes: corrosion and chemical formation according to the process sequence: the corrosion process first makes the high-purity aluminum foil undergo a series of electrochemical treatments in a specific solution to obtain a corroded foil, corroded foil The surface forms a microscopic rough structure including a large number of microscopic pores and channels, thereby greatly improving the specific surface area of ​​the aluminum foil. The different shapes of these pores and channels, as well as changes in their combinations and distributions, will lead to different microscopic roug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B15/04
Inventor 罗向军汪战胜蒋霞王宪
Owner RUYUAN YAO AUTONOMOUS COUNTY DONGYANGGUANG FORMED FOIL CO LTD
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