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Preparation method of Al2O3/TiO2 compound dielectric film aluminum electrode foil

A technology of composite dielectric film and aluminum electrode foil, which is applied in the direction of capacitor electrodes, circuits, capacitors, etc., can solve the problems of long cycle time and easy burning of aluminum electrode foil, so as to reduce industrial production energy consumption, high anodic oxidation current utilization efficiency, The effect of increasing the dielectric constant

Active Publication Date: 2011-05-11
SICHUAN LIYE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ferroelectric material composite dielectric film prepared by the sol-gel method, due to the high sintering temperature of the ferroelectric material, the aluminum electrode foil is easy to burn during the preparation process, and the entire sol-gel process takes a long time

Method used

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  • Preparation method of Al2O3/TiO2 compound dielectric film aluminum electrode foil
  • Preparation method of Al2O3/TiO2 compound dielectric film aluminum electrode foil
  • Preparation method of Al2O3/TiO2 compound dielectric film aluminum electrode foil

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Experimental program
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Effect test

Embodiment approach 1

[0039] Mix deionized water and methanol uniformly at a ratio of 3:1 to obtain methanol aqueous solution, add TiCl 4 and H 2 o 2 solution, control TiCl 4 Concentration is 0.005mol / L, H 2 o 2 The concentration is 0.02mol / L, and the temperature of the solution is controlled at 5°C; then, the inert metal platinum is used as the positive electrode, and the aluminum corrosion foil is subjected to cathodic electrodeposition, the current is 0.005A, the voltage is 8V, and the deposition time is 20 minutes.

[0040] Through low temperature and high temperature heat treatment, the temperature of low temperature heat treatment is 75°C, and the treatment time is 5 minutes; the temperature of high temperature heat treatment is 550°C, and the treatment time is 10 minutes. Anatase-type TiO was deposited on the surface of aluminum corrosion foil through the above-mentioned temperature-controlled heat treatment. 2 Nano oxide film.

[0041] After using the above-mentioned process, the corr...

Embodiment approach 2

[0043] Mix deionized water and methanol uniformly at a ratio of 3:1 to obtain methanol aqueous solution, add TiCl 4 and H 2 o 2 solution, control TiCl 4 Concentration is 0.01mol / L, H 2 o 2 The concentration is 0.03mol / L, and the temperature of the solution is controlled at 5°C; then, the inert metal platinum is used as the positive electrode, and the aluminum corrosion foil is subjected to cathodic electrodeposition, the current is 0.01A, the voltage is 15V, and the deposition time is 10 minutes.

[0044] Through low temperature and high temperature heat treatment, wherein the temperature of low temperature heat treatment is 60°C, and the treatment time is 5 minutes; the temperature of high temperature heat treatment is 450°C, and the treatment time is 10 minutes. Anatase-type TiO was deposited on the surface of aluminum corrosion foil through the above-mentioned temperature-controlled heat treatment. 2 Nano oxide film.

[0045] After using the above-mentioned process, t...

Embodiment approach 3

[0047] Mix deionized water and methanol uniformly at a ratio of 3:1 to obtain methanol aqueous solution, add TiCl 4 and H 2 o 2 solution, control TiCl 4 Concentration is 0.1mol / L, H 2 o 2 The concentration is 0.2mol / L, and the temperature of the solution is controlled at 20°C; then, the inert metal platinum is used as the positive electrode, and the aluminum corrosion foil is subjected to cathodic electrodeposition, the current is 0.5A, the voltage is 50V, and the deposition time is 1 minute.

[0048] Through low temperature and high temperature heat treatment, the temperature of low temperature heat treatment is 100°C, and the treatment time is 5 minutes; the temperature of high temperature heat treatment is 600°C, and the treatment time is 2 minutes. Anatase-type TiO was deposited on the surface of aluminum corrosion foil through the above-mentioned temperature-controlled heat treatment. 2 Nano oxide film.

[0049] After using the above-mentioned process, the corroded ...

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Abstract

The invention relates to a preparation method of an Al2O3 / TiO2 compound dielectric film aluminum electrode foil, belonging to the technical field of electronic materials. The invention adopts a cathode electrochemical deposition technology and comprises the following steps: depositing TiO3(H2O)x on the surface of an aluminum etching foil through an inert metal anode and a soluble titanium salt solution system; then decomposing the TiO3(H2O)x through temperature control heat treatment to obtain an anatase TiO2 nanometer high dielectric oxidation film; and finally, through a conventional barrier type aluminum anode oxidation technology, preparing an Al2O3 / TiO2 compound dielectric film with a high dielectric constant so as to obtain the Al2O3 / TiO2 compound dielectric film aluminum electrode foil. Under the condition that the thickness of the compound dielectric film on the surface of the aluminum electrode foil is the same as that of a conventional dielectric film, the aluminum electrode foil of the invention has higher dielectric constant and can effectively improve the capacitance level.

Description

technical field [0001] The invention belongs to the technical field of electronic materials and relates to a method for preparing a composite dielectric film aluminum electrode foil. The aluminum electrode foil prepared by the invention is mainly used in aluminum electrolytic capacitors. Background technique [0002] Aluminum electrolytic capacitors play an indispensable role in the field of electronic components due to their high capacity per unit volume ratio and low cost. The core component of an aluminum electrolytic capacitor is the aluminum electrode foil. The aluminum oxide dielectric film obtained after anodizing the surface of the aluminum electrode foil is the key material for the formation of the capacitance characteristics of the aluminum electrolytic capacitor. Miniaturization, high performance, and long life are the main directions for the current development of aluminum electrolytic capacitors. [0003] The key to the miniaturization of aluminum electrolytic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/04H01G9/045H01G9/055C25D11/04C25D9/12
Inventor 冯哲圣梁孜陈金菊
Owner SICHUAN LIYE ELECTRONICS
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