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Preparation method for preparing medium-low pressure composite dielectric film-containing formed foil by surface self-assembly method

A technology of composite dielectric film and self-assembly method, which is applied in the direction of capacitor dielectric layer, electrolytic capacitor manufacturing, electrical components, etc., to achieve the effect of large deposition, easy operation, and reduced production cost

Active Publication Date: 2020-10-13
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

in Al 2 o 3 / TiO 2 Hydrolytic deposition of TiO on the surface of aluminum foil in composite film 2 The amount of deposition is the key factor to determine the specific capacity of aluminum foil, although the hydrolytic deposition method and sol-gel method have effectively improved the specific capacity of aluminum foil, but TiO 2 The amount of deposition can still be further increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve γ-mercaptopropyltrimethoxysilane in cyclohexane to make a solution with a concentration of 5mmol / L. Put the corroded foil into this solution and soak it for 5h, then take it out and dry it in the air. After that, put the dried aluminum foil into a solution made of acetic acid and 30% hydrogen peroxide at a volume ratio of 5:1 and soak for 1 hour. After soaking, take it out and dry it in the air. Then put the dried aluminum foil into butyl titanate and acetic acid and mix it at a molar ratio of 1:6, add deionized water dropwise until the concentration of Ti is 0.3mol / L and soak in the sol for 5h. After soaking, take it out and dry it in the air, then put it into a muffle furnace for heat treatment at 500°C for 2min. Put the heat-treated aluminum foil into the six-stage chemical conversion solution prepared by ammonium adipate and deionized water at room temperature in turn, with conductivity of 43, 37, 50, 46, 52, and 48 mS / cm, and heat the chemical conversion s...

Embodiment 2

[0026] Dissolve γ-mercaptopropyltrimethoxysilane in cyclohexane to make a solution with a concentration of 7mmol / L. Put the corroded foil in this solution and soak it for 5h, then take it out and dry it in the air. After that, put the dried aluminum foil into a solution made of acetic acid and 30% hydrogen peroxide at a volume ratio of 5:1 and soak for 1 hour. After soaking, take it out and dry it in the air. Then put the dried aluminum foil into butyl titanate and acetic acid to mix at a molar ratio of 1:6, add deionized water dropwise until the concentration of Ti is 0.8mol / L and soak in the sol for 8h. After soaking, take it out and dry it in the air, and put it into a muffle furnace for heat treatment at 500°C for 5 minutes. Put the heat-treated aluminum foil into the six-stage chemical conversion solution prepared by ammonium adipate and deionized water at room temperature in turn, with conductivity of 43, 37, 50, 46, 52, and 48 mS / cm, and heat the chemical conversion sol...

Embodiment 3

[0028] Dissolve γ-mercaptopropyltrimethoxysilane in cyclohexane to make a solution with a concentration of 10mmol / L. Put the corroded foil into this solution and soak it for 5h, then take it out and dry it in the air. After that, put the dried aluminum foil into a solution made of acetic acid and 30% hydrogen peroxide at a volume ratio of 5:1 and soak for 1 hour. After soaking, take it out and dry it in the air. Then put the dried aluminum foil into butyl titanate and acetic acid and mix it at a molar ratio of 1:6, add deionized water dropwise until the concentration of Ti is 0.6mol / L and soak in the sol for 10h. After soaking, take it out and dry it in the air, then put it in a muffle furnace for heat treatment at 500°C for 5 minutes, put the heat-treated aluminum foil in turn at room temperature, and mix it with ammonium adipate and deionized water. The conductivity is 43, 37, 50, 46, 52, 48mS / cm six grades of formation liquid, heating the formation liquid at 85°C, at a curr...

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Abstract

The invention discloses a preparation method for preparing a medium-low pressure composite dielectric film-containing formed foil by a surface self-assembly method. According to the method, low-pressure corrosion foil serves as a raw material, and surface modification is conducted on the aluminum foil through a soaking method. The preparation method comprises the following steps: sequentially soaking a corrosion foil in a solution taking 5-10mmol / L of gamma-mercaptopropyltrimethoxysilane and cyclohexane as solvents for 5 hours, a solution taking CH3COOH / H2O2(Vol) as a ratio of 5: 1 for 1 hour,and 0.3-0.8 mol / L of Ti gel for 5-10 hours; and carrying out heat treatment at 500 DEG C for 5 minutes after airing; carrying out anodic oxidation on the aluminum foil, preparing a formation solutionby taking ammonium adipate and ammonium citrate as solutes, and carrying out six-stage gradient formation on the modified aluminum foil according to the conditions that the current density is 0.1-0.3A / cm < 2 > and the voltage is 12-141 V; and sequentially carrying out intermediate treatment, re-formation, heat treatment and post-treatment on the aluminum foil to finally obtain the high-specific-volume intermediate-low-pressure composite dielectric film-containing formed foil. The method has the advantages that the process is simple, and the operation is convenient. The deposition amount of TiO2 on the surface of the aluminum foil is large, and the prepared aluminum foil is high in specific volume.

Description

technical field [0001] The invention relates to the field of surface modification of aluminum foil, in particular to a method for preparing medium and low pressure composite medium-containing films into foils by means of a surface self-assembly method. 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...

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谢新玲王灿宇罗轩
Owner GUANGXI UNIV
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