Sample preparation method for measuring aluminium electrolysis capacitor electric pole foil microscopic appearance

An aluminum electrolytic capacitor and micro-topography technology, which is applied in the preparation of test samples, instruments, measuring devices, etc., can solve problems such as scientific analysis of difficult micro-morphological parameters

Inactive Publication Date: 2008-07-02
XINJIANG JOINWORLD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of sample preparation is easy to dissolve the smaller microscopic morphology, and the microscopic morphology of different layers is dissolved, so it is not easy to scientifically analyze the microscopic morphology parameters

Method used

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  • Sample preparation method for measuring aluminium electrolysis capacitor electric pole foil microscopic appearance
  • Sample preparation method for measuring aluminium electrolysis capacitor electric pole foil microscopic appearance
  • Sample preparation method for measuring aluminium electrolysis capacitor electric pole foil microscopic appearance

Examples

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Embodiment 1

[0024] Embodiment 1, the method for measuring the microscopic appearance of the high-voltage corrosion foil (that is, no foil formed) of the electrode foil for an aluminum electrolytic capacitor: a, sample cutting: the foil is cut into a sample of 4 mm × 8 mm; b, Electropolishing treatment: the electrode foil is placed in the polishing solution, treated at 70°C or 80°C or 85°C or 90°C for 90 seconds or 100 seconds or 150 seconds or 180 seconds, and the current density is 0.1A / cm² or 0.3A / square centimeter or 0.5 A / square centimeter, and clean it with deionized water, dry it, and set it aside. The electrolytic polishing device is as attached figure 1 c. Detection: Place the sample under an electron microscope to take pictures to obtain the required electron microscope photos, and detect the microscopic appearance. Wherein, the electrolytic polishing liquid mainly contains 70% phosphoric acid and 20% chromium trioxide aqueous solution by weight percentage, or the electrolyti...

Embodiment 2

[0025] Example 2, the method for measuring the microscopic appearance of the low-voltage foil of the electrode foil for aluminum electrolytic capacitors: a. Sample cutting: the electrode foil is placed in the electrolytic polishing solution, and the foil is cut into 4mm×8mm sample pieces ; b. Electropolishing treatment: the electrode foil is placed in a polishing solution, and treated at 70°C or 80°C or 85°C or 90°C for 90 seconds or 100 seconds or 150 seconds or 180 seconds, and the current density is 0.1 A / cm2 Or 0.3 A / cm2 or 0.5 A / cm2, and cleaned with deionized water, dried, and set aside; c. Detection: Place the sample under an electron microscope to take pictures to obtain the required electron microscope photos, and detect the microscopic appearance. Wherein, the electrolytic polishing liquid mainly contains 70% phosphoric acid and 20% chromium trioxide aqueous solution by weight percentage, or the electrolytic polishing liquid mainly contains 75% phosphoric acid and 15%...

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Abstract

A sampling method for observing microstructure of electrode foil used in an aluminum electrolytic capacitor comprises the following steps of: (1) cutting a sample; (2) electrolytic polishing; and (3) detecting. The invention can conveniently, rapidly and accurately obtain the electronic microscope picture reflecting the microstructure of electrode foil, so being particularly suitable for observation and detection of the microstructure of electrode foil. The invention establishes a foundation for studying the relationship of electrochemistry conditions and the microstructure of electrode foil, and provides a guarantee for developing capacitor-used electrode foil with high specific capacity, low resistance and high stability.

Description

technical field [0001] The invention relates to the technical field of measuring electrode foils for aluminum electrolytic capacitors, and relates to a sample preparation method for measuring the microscopic appearance of electrode foils for aluminum electrolytic capacitors. Background technique [0002] The electrode foil for aluminum electrolytic capacitors undergoes chemical or electrochemical corrosion, and a large number of fine pits are distributed on the surface, thereby increasing the effective surface area and roughness of the electrode foil. The electrode foil for aluminum electrolytic capacitors is composed of an etched layer and an uncorroded layer. 6 to 10 8 A honeycomb or tunnel-shaped small hole with a diameter of about 10 nanometers to 1000 nanometers. This shape has reached the nanometer size. When analyzing the mechanism of the relationship between the medium and high voltage anode foil process experiment and the tunnel hole growth, the researchers used a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/32G01N13/10G01Q30/20
Inventor 迟慧洪涛
Owner XINJIANG JOINWORLD CO LTD
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