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Preparation method of Al2O3-TiO2 composite membrane

A technology of al2o3-tio2, 1.al2o3-tio2, applied in the field of composite film, can solve the complex problems of corroding the surface of aluminum foil, and achieve the effects of avoiding phase transition and embrittlement, enhancing bonding force and simple equipment

Active Publication Date: 2010-11-03
GUANGDONG HUAFENG NEW ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The second problem is that the surface of the corroded aluminum foil has a complex pore structure. In order to apply the oxide precursor solution evenly to the pore surface, it is necessary to reasonably control the viscosity of the precursor solution.

Method used

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  • Preparation method of Al2O3-TiO2 composite membrane
  • Preparation method of Al2O3-TiO2 composite membrane
  • Preparation method of Al2O3-TiO2 composite membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Embodiment 1: add 30ml acetone in dry Erlenmeyer flask, then add 3 grains of I 2 (about 0.075g), then add 1.0ml of water three times, and stir for more than 40min. Then add 150ml isopropanol, add 0.541g nanometer rutile TiO after continuing to stir for 30min 2 powder. After stirring evenly, add 5ml of polyethylene glycol, then stir for more than 24h to make it uniformly dispersed, and finally ultrasonicate for 20min under the ultrasonic power of 99W to obtain a stable electrophoretic suspension. Electrophoretic deposition was performed at a voltage of 12V, and the deposition time was 8 minutes. After the foil is naturally dried at room temperature, it is heat-treated at 500°C for 10 minutes.

[0040] Use corrosion foil for low-voltage aluminum electrolytic capacitors (apparent thickness 100μm), and manually cut 50mm×10mm handle samples into 150g / L ammonium adipate solution for chemical conversion treatment, and also for samples without any pretreatment Corroded foils ...

Embodiment 2

[0041] Embodiment 2: add 30ml acetone in dry Erlenmeyer flask, then add 5 grains of I 2 (about 0.125g), then add 1.0ml of water three times, and stir for more than 40min. Then add 140ml of isopropanol, continue stirring for 30min and add 0.0540g of nanometer rutile TiO 2 powder. After stirring evenly, add 4ml of polyethylene glycol, then stir for more than 24h to make it uniformly dispersed, and finally ultrasonicate for 20min under the ultrasonic power of 99W to obtain a stable electrophoretic suspension. Electrophoretic deposition was performed at a voltage of 18V, and the deposition time was 3 minutes. After the foil is naturally dried at room temperature, it is heat-treated at 500°C for 10 minutes.

[0042] Use corrosion foil for low-voltage aluminum electrolytic capacitors (apparent thickness 100μm), and manually cut 50mm×10mm handle samples into 150g / L ammonium adipate solution for chemical conversion treatment, and also for samples without any pretreatment Corroded ...

Embodiment 3

[0043] Embodiment 3: add 30ml acetone in dry Erlenmeyer flask, then add 3 grains of I 2 (about 0.075g), then add 5.0ml of water three times, and stir for more than 40min. Then add 150ml of isopropanol, continue stirring for 30min and add 0.0469g of nanometer rutile TiO 2 powder. After stirring evenly, add 2ml of polyethylene glycol, then stir for more than 24h to make it uniformly dispersed, and finally ultrasonicate for 20min at 99W ultrasonic power to obtain a stable electrophoretic suspension. Electrophoretic deposition was performed at a voltage of 26V, and the deposition time was 4min. After the foil is naturally dried at room temperature, it is heat-treated at 500°C for 10 minutes.

[0044] Use corrosion foil for low-voltage aluminum electrolytic capacitors (apparent thickness 100μm), and manually cut 50mm×10mm handle samples into 150g / L ammonium adipate solution for chemical conversion treatment, and also for samples without any pretreatment Corroded foils were chem...

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Abstract

The invention discloses a preparation method of an Al2O3-TiO2 composite membrane, relating to a composite membrane and providing a preparation method of an Al2O3-TiO2 composite membrane with a high dielectric constant. The preparation method comprises the steps of: sequentially adding acetone, iodine, water in three times and alcohol into a container, stirring, then adding nanoscale rutile TiO2 powder, uniformly stirring and then adding polyethylene glycol, stirring till even dispersing, and carrying out ultrasound treatment to obtain a TiO2 suspending liquid as an electrophoresis sediment liquid; depositing at 12-26V by adopting a double electrode electrolytic bath and using a stainless steel as a counter electrode (anode) and corrosion foil as a working electrode (cathode), carrying out thermal treatment after the foil is dried, and forming an Al2O3-TiO2 thin film on the corrosion foil to obtain a composite aluminum foil; and placing the composite aluminum foil into a weak acid or ammonium salt solution, after anodizing and thermal treatment in the presence of water bath, placing the composite aluminum foil into the weak acid or ammonium salt solution again for anodizing to obtain the Al2O3-TiO2 composite membrane.

Description

technical field [0001] The invention relates to a composite film, in particular to a manufacturing technology of high specific capacity anode aluminum electrode foil for low-voltage aluminum electrolytic capacitors. Background technique [0002] Aluminum electrolytic capacitors are famous for their large capacitance per unit volume, small size, light weight and low price. They are widely used in various electronic circuits for low-frequency filtering, audio coupling, DC blocking, and energy storage. They are widely used and difficult to One of the replaced electronic components. In recent years, with the rapid development of the international information industry, the update of monitors, power supplies, motherboards, and PS2's promotion of V-Chip and automotive electronics have injected new vitality into the capacitor market. With the development of science and technology, the application fields of aluminum electrolytic capacitors are constantly expanding. It can be predic...

Claims

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Application Information

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IPC IPC(8): C25D13/02C25D11/06H01G9/04
Inventor 孙岚布俊福郭文熹林昌健
Owner GUANGDONG HUAFENG NEW ENERGY TECH CO LTD
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