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Preparation method of medium-low pressure formed foil containing composite dielectric film

A composite dielectric film and forming foil technology, which is applied in the direction of capacitor dielectric layer, electrolytic capacitor manufacturing, electrical components, etc., can solve problems such as difficulty in the working electrolyte entering the hole, poor contact on the surface of the dielectric film, and deterioration of frequency characteristics. It is not easy to achieve The effects of floating wrinkles and wavy edges, long service life and easy operation

Active Publication Date: 2020-09-25
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because further refining the holes formed by corrosion will make it difficult for the working electrolyte to enter the holes, poor contact with the surface of the dielectric film, and deterioration of loss, impedance, and frequency characteristics.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (The solutions mentioned below are calculated according to mass percentage if not specifically marked.) The corroded foil is soaked in 0.3mol / L Ti sol sol prepared by butyl titanate to acetic acid molar ratio of 1:6 and water for 5h, and then heat treated for 300 s after taking it out. The corroded foil after pretreatment is put into the first-grade chemical solution. At room temperature, a solution with a conductivity of 40.0 mS / cm is prepared from 0.3% ammonium citrate plus 6% ammonium adipate and deionized water. The chemical solution is heated to 80 °C , the formation time is 180s. After completion, wash with water and enter the next stage of chemical conversion, and then repeat the above operations. The secondary formation solution is prepared from 0.5% ammonium citrate plus 5% ammonium adipate and deionized water at room temperature to obtain a solution with a conductivity of 37.0 mS / cm, heated to 85 ℃, and the formation time is 180s. The tertiary formation and l...

Embodiment 2

[0021](The solutions mentioned below are calculated according to mass percentage if not specifically marked.) The corroded foil is soaked in 0.5mol / L Ti sol sol prepared by butyl titanate to acetic acid molar ratio of 1:6 and water for 8 hours, and heat treated for 300 s after taking it out. After the pretreatment, the corroded foil is put into the primary chemical solution. At room temperature, a solution with a conductivity of 42.0 mS / cm is prepared from 0.3% ammonium citrate plus 6% ammonium adipate and deionized water, and the chemical solution is heated to 80 °C. , the formation time is 250s. After completion, wash with water and enter the next stage of chemical conversion, and then repeat the above operations. The secondary formation solution is prepared from 0.5% ammonium citrate plus 5% ammonium adipate and deionized water at room temperature to obtain a solution with a conductivity of 39.0 mS / cm, heated to 85 ℃, and the formation time is 200s. The three-stage chemica...

Embodiment 3

[0023] (The solutions mentioned below are calculated according to mass percentage if not specifically marked.) The corroded foil is soaked in 0.8mol / L Ti sol sol prepared by butyl titanate to acetic acid molar ratio of 1:6 and water for 10h, and heat treated for 300 s after taking it out. After the pretreatment, the corroded foil was put into the primary chemical solution. At room temperature, a solution with a conductivity of 43.0 mS / cm was prepared from 0.3% ammonium citrate plus 6% ammonium adipate and deionized water, and the chemical solution was heated to 80 °C. , the formation time is 300s. After completion, wash with water and enter the next stage of chemical conversion, and then repeat the above operations. The secondary formation solution is prepared from 0.5% ammonium citrate plus 5% ammonium adipate and deionized water at room temperature to obtain a solution with a conductivity of 40.0mS / cm, heated to 85 ℃, and the formation time is 300s. The tertiary formation a...

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Abstract

The invention discloses a preparation method of a medium-low pressure formed foil containing a composite dielectric film. According to the method, a low-pressure corrosion foil is used as a raw material, and the corrosion foil is put into Ti-containing sol through a soaking method, so that the surface of the aluminum foil contains the Ti-containing sol. Anodic oxidation is carried out on the pretreated aluminum foil, and the specific operations comprise six-stage formation, intermediate treatment, re-formation, heat treatment and post-treatment. The formation liquid is prepared from ammonium adipate, sodium citrate and deionized water, and the intermediate treatment liquid is prepared from phosphoric acid, citric acid and deionized water. The post-treatment liquid is prepared from ammoniumdihydrogen phosphate, ammonium dihydrogen citrate and deionized water. The preparation method is simple in process and convenient to operate, and the prepared aluminum foil is higher in specific volume and higher in hydration resistance.

Description

technical field [0001] The invention relates to the field of aluminum foil formation, in particular to a preparation method for low-pressure formation foil containing a composite dielectric film. Background technique [0002] In the family of electrolytic capacitors, aluminum electrolytic capacitors have been greatly developed in the world in the past 20 years due to their superior performance, low price and wide range of uses. [0003] With the continuous development of electronic products in the direction of intelligence and miniaturization, the structure of the circuit system is becoming more and more complex, and there are more and more electronic components per unit area. Aluminum electrolytic capacitors are the basic electronic components in the circuit system. It is widely used in communication equipment, mobile office, audio-visual system, household appliances, aerospace and other fields. [0004] According to the capacitance formula of planar capacitor [0005] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/00H01G9/055H01G9/07
CPCH01G9/0032H01G9/055
Inventor 秦祖赠徐毅远苏通明王文宝欧永聪罗轩王灿宇谢新玲
Owner GUANGXI UNIV
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