Electrolytic capacitor aluminum foil oxidation film stripping liquid and microscopic appearance measurement method

A technology of electrolytic capacitors and micro-topography, applied in the preparation of electrolytic capacitors, capacitors, and test samples, etc., can solve the problem of long time, and it takes 24 hours to 48 hours to make a foil sample, and achieve the effect of low impedance.

Active 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

The shape is detected and observed under the electron microscope. The sample preparation process hardly changes its shape, but the sample preparation time is long, and it takes 24 hours to 48 hours for each foil sample.

Method used

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  • Electrolytic capacitor aluminum foil oxidation film stripping liquid and microscopic appearance measurement method
  • Electrolytic capacitor aluminum foil oxidation film stripping liquid and microscopic appearance measurement method
  • Electrolytic capacitor aluminum foil oxidation film stripping liquid and microscopic appearance measurement method

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1, the method for measuring the microscopic appearance of the high-voltage corroded foil (that is, no foil) of aluminum foil for electrolytic capacitors: a, formation treatment: adopt the electronic industry standard of the People's Republic of China (aluminum electrolytic capacitor) SJ / T11140-1997 The conventional method of forming foil is to cut the foil into a sample of a certain size, use 520 volts for chemical formation, and make a formed foil, and prepare a uniformly distributed oxide film with a certain thickness on the surface of the corroded aluminum foil to replicate the foil sample. Microscopic appearance; b. Oxide film peeling: put the formed aluminum foil in the oxide film stripping solution, and treat it for 30 minutes at 45°C to 50°C until the oxide film is completely separated from the aluminum foil substrate, take out the oxide film, and use a deionized Clean with water, dry, and set aside; c. Cutting: take advantage of the very brittle nature...

Embodiment 2

[0034]Embodiment 2, the method for measuring the microscopic appearance of the low-voltage corroded foil (that is, no foil) of aluminum foil for electrolytic capacitors: a, formation treatment: adopt the electronic industry standard of the People's Republic of China (aluminum electrolytic capacitor) SJ / T11140-1997 The method of forming foil is to cut the foil into a sample of a certain size, and use 132 volts for chemical formation to make a formed foil, and prepare a uniformly distributed oxide film with a certain thickness on the surface of the corroded aluminum foil to replicate the microscopic shape of the foil. Appearance; b. Oxide film peeling: put the formed aluminum foil in the oxide film stripping solution, and treat it at 30°C to 35°C for 10 minutes, until the oxide film is completely separated from the aluminum foil substrate, take out the oxide film, and clean it with deionized water Clean, dry, and set aside; c. Sample cutting: make use of the very brittle nature o...

Embodiment 3

[0035] Example 3, the micro-morphological measurement method of the low-pressure aluminum foil for electrolytic capacitors into foil (i.e. forming foil): a, oxide film peeling: the formed aluminum foil is placed in the oxide film stripping solution, under the condition of 35 ° C to 40 ° C Treat for 10 minutes, until the oxide film is completely separated from the aluminum foil substrate, take out the oxide film, clean it with deionized water, dry it, and set aside; b. Sample cutting: use tweezers or a blade to cut the oxide film Make a sample of about 1mm*5mm; c. Detection: take pictures of the sample under an electron microscope to detect the microscopic appearance. Wherein, the oxide film stripping liquid mainly contains an alkaline aqueous solution of 0.5% sodium hydroxide and 0.1% sodium phosphate by weight percentage, or the oxide film stripping liquid mainly contains 10% sodium hydroxide and 1.0% sodium phosphate by weight percentage alkaline aqueous solution, or the oxi...

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Abstract

The invention relates to an oxide film stripper of the aluminium foil for electrolytic capacitor and a method for measuring the micro-morphology. The oxide film stripper is the alkaline aqueous solution mainly containing the sodium hydroxide and the sodium phosphate. The method for measuring the micro-morphology of the aluminium foil for electrolytic capacitor of the formed foil is implemented following the first step of stripping the oxide film, the second step of sampling and the third step of detection. The method for measuring the micro-morphology of the aluminium foil for electrolytic capacitor of the unformed foil is implemented following the first step of formation treatment, the second step of stripping the oxide film, the third step of sampling and the fourth step of detection. The adoption of the invention can conveniently, quickly and accurately obtain the electronic microscope photograph in which the micro-morphology of the unformed or / and formed aluminium foil is shown, thus the invention is in particular suitable for the observation and detection of the micro-morphology of the formed foil or / and unformed foil, which lays the first stone for researching the connection between the electrochemical condition and the micro-morphology of the electrode foil and provides the guarantee for researching and developing the high specific capacitance, low impedance and high stability electrode foil for capacitor.

Description

technical field [0001] The invention relates to the technical field of measuring aluminum foil for aluminum electrolytic capacitors, and relates to an oxide film stripping solution and a microscopic shape measurement method for aluminum foils for electrolytic capacitors. Background technique [0002] The aluminum foil for electrolytic capacitors is chemically or electrochemically corroded, and a large number of fine pits are distributed on the surface, thereby increasing the effective surface area and roughness of the aluminum foil. Aluminum foil for electrolytic capacitors is composed of an etched layer and an uncorroded layer. The thickness of the foil is 30 microns to 120 microns, the thickness of the etched layer is 3 microns to 50 microns, and the thickness of the uncorroded layer is 20 microns to 40 microns. There are about 10 microns per square centimeter. 6 to 10 8 A honeycomb or tunnel-shaped small hole with a diameter of about 10 nanometers to 1000 nanometers. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/055C23G1/22G01N1/28
Inventor 王兰东
Owner XINJIANG JOINWORLD CO LTD
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