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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AI-Extracted Technical Summary

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...

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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.

Application Domain

AnodisationCapacitor electrodes +1

Technology Topic

Anodic oxidationCorrosion +18

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Examples

Experimental program(5)

Example Embodiment

[0039] Example 1: Add 30ml of acetone to a 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 40 minutes. Then add 150ml of isopropanol, continue to stir for 30min, then add 0.541g of nano rutile TiO 2 powder. After stirring uniformly, 5ml polyethylene glycol was added, followed by stirring for more than 24 hours to make it evenly dispersed, and finally ultrasonic power of 99W for 20 minutes to obtain a stable electrophoretic suspension. Electrophoretic deposition was performed under 12V voltage, 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 min.

[0040] Use corrosion foil for low-voltage aluminum electrolytic capacitors (apparent thickness 100μm), and manually cut into 50mm×10mm samples with shank, and chemically treat them in 150g/L ammonium adipate solution. The corroded foil is chemically processed under the same conditions. The results show that in this suspension system, electrophoretic deposition of TiO 2 The specific volume of the corroded foil is 6.8% higher than that without electrophoretic deposition.

Example Embodiment

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

[0042] Use corrosion foil for low-voltage aluminum electrolytic capacitors (apparent thickness 100μm), and manually cut into 50mm×10mm samples with shank, and chemically treat them in 150g/L ammonium adipate solution. The corroded foil is chemically processed under the same conditions. The results show that in this suspension system, electrophoretic deposition of TiO 2 The specific volume of the corroded foil is 20% higher than that without electrophoretic deposition.

Example Embodiment

[0043] Example 3: Add 30ml of acetone to a dry Erlenmeyer flask, then add 3 grains of I 2 (About 0.075g), add 5.0ml of water three times, and stir for more than 40 minutes. Then add 150ml of isopropanol, continue to stir for 30min, then add 0.0469g of nano rutile TiO 2 powder. After stirring uniformly, 2ml polyethylene glycol was added, followed by stirring for more than 24 hours to make the dispersion uniform, and finally ultrasonic power of 99W for 20 minutes to obtain a stable electrophoretic suspension. Electrophoretic deposition was carried out at 26V, and the deposition time was 4 minutes. After the foil is naturally dried at room temperature, it is heat-treated at 500°C for 10 min.

[0044] Use corrosion foil for low-voltage aluminum electrolytic capacitors (apparent thickness 100μm), and manually cut into 50mm×10mm samples with shank, and chemically treat them in 150g/L ammonium adipate solution. The corroded foil is chemically processed under the same conditions. The results show that in this suspension system, electrophoretic deposition of TiO 2 The specific volume of the corroded foil is 12.9% higher than that without electrophoretic deposition.

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Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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Classification and recommendation of technical efficacy words

Improve binding
Avoid Phase Change and Embrittlement

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

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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