Preparation method of anodized aluminum film of through hole

An anodized aluminum and anodic oxidation technology, applied in the direction of electrolytic coating, surface reaction electrolytic coating, coating, etc., can solve the problems of large emissions, high cost, complex equipment, etc., and achieve safe operation, uniform cycle, and simplified equipment Effect

Inactive Publication Date: 2012-11-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of anodic aluminum oxide film, which has the advantages of simple equipment, easy implementation, and little environmental pollution, etc. Advantages Through Holes

Method used

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  • Preparation method of anodized aluminum film of through hole
  • Preparation method of anodized aluminum film of through hole
  • Preparation method of anodized aluminum film of through hole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Make high-purity aluminum flakes into specific shapes, anneal in argon atmosphere, and then wash them in strong alkali solution, organic solvent and deionized water to obtain clean aluminum flakes;

[0035] (2) With the clean aluminum sheet obtained in step (1) as the anode and the ordinary aluminum sheet as the cathode, the HClO at 0°C 4 : CH 3 CH 2 In the polishing solution of OH=1:4, 15V DC constant voltage electrochemical polishing for 3min, the anode gets polished aluminum sheet;

[0036] (3) Use the polished aluminum sheet obtained in step (2) as the anode, the graphite electrode as the cathode, and 0.3mol / L oxalic acid as the electrolyte, and conduct an anodic oxidation at 0°C for 6 hours at a DC constant voltage;

[0037] (4) Place the anodized aluminum sheet obtained in step (3) in 1.8%CrO at 60°C 3 and 6%H 3 PO 4 Soak in the mixed aqueous solution for 6 hours, then wash with deionized water;

[0038] (5) Use the aluminum sheet cleaned with deionized ...

Embodiment 2

[0044] (1) Make high-purity aluminum flakes into specific shapes, anneal in argon atmosphere, and then wash them in strong alkali solution, organic solvent and deionized water to obtain clean aluminum flakes;

[0045] (2) With the clean aluminum sheet obtained in step (1) as the anode and the ordinary aluminum sheet as the cathode, the HClO at 0°C 4 : CH 3 CH 2 In the polishing solution of OH=1:5, 10V DC constant voltage electrochemical polishing for 5min, the anode gets polished aluminum sheet;

[0046] (3) Use the polished aluminum sheet obtained in step (2) as the anode, the graphite electrode as the cathode, and 0.5mol / L oxalic acid as the electrolyte, and conduct an anodic oxidation once at a DC constant voltage of 10°C for 6 hours;

[0047] (4) Place the anodized aluminum sheet obtained in step (3) at 80°C in 3%CrO 3 and 10%H 3 PO 4 Soak in the mixed aqueous solution for 6 hours, then wash with deionized water;

[0048] (5) Use the aluminum sheet cleaned with deioniz...

Embodiment 3

[0052] (1) Make high-purity aluminum flakes into specific shapes, anneal in argon atmosphere, and then wash them in strong alkali solution, organic solvent and deionized water to obtain clean aluminum flakes;

[0053] (2) With the clean aluminum sheet obtained in step (1) as the anode and the ordinary aluminum sheet as the cathode, the HClO at 0°C 4 : CH 3 CH 2 In the polishing solution of OH=1:10, 21V DC constant voltage electrochemical polishing for 3min, the anode was polished aluminum sheet;

[0054] (3) With the polished aluminum sheet obtained in step (2) as the anode and the graphite electrode as the cathode, 0.6mol / L H 3 PO 4 As the electrolyte, an anodic oxidation is performed once at 20°C for 8 hours at a DC constant voltage;

[0055] (4) Place the anodized aluminum sheet obtained in step (3) at 90°C in 5%CrO 3 and 15%H 3 PO 4 Soak in the mixed aqueous solution for 6 hours, then wash with deionized water;

[0056] (5) Use the aluminum sheet washed with deioni...

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Abstract

The invention discloses a preparation method of an anodized aluminum film of a through hole. The preparation method mainly comprises the following steps: after a high-purity aluminum sheet is subjected to annealing, oxide layer removing, degreasing and electrochemical polishing treatment, placing into an anodizing electrolytic cell to carry out primary anode oxidation by taking oxalic acid, sulfuric acid or phosphoric acid solution as electrolyte, after an oxide layer is removed through treatment of mixed aqueous solution of chromic acid and phosphoric acid once, the secondary oxidation is carried out under the same conditions, the residual aluminum-based substrate is removed in acid solution, and reaming is carried in the phosphoric acid, so that the anodized aluminum film of the through hole with small aperture, and the controlled aperture and thickness is obtained. According to the invention, the relatively cheap device is used, through the simpler process, a large amount of anodized aluminum films of through holes can be simply and uniformly prepared in a lossless manner, and heavy metals are not introduced in a process of removing the residual aluminum substrate, so that environmental pollution is reduced. The prepared anodized aluminum film has the advantages of good uniformity and repeatability, highly ordered nanometer pore passage, uniform period, and controlled thickness and aperture.

Description

technical field [0001] The invention belongs to the field of chemical materials, and relates to the preparation technology of porous film anodized aluminum, in particular to a simple and environment-friendly preparation method of anodized aluminum film. Background technique [0002] The nanopores of anodized aluminum oxide (abbreviation: AAO) membrane are highly ordered, uniform in period and perpendicular to the membrane surface, which makes it have high physical and chemical stability and high specific surface area and other superior properties. It has been used It is used as a template for the preparation of a large number of superlattice nano-functional materials, such as nano-dots, nano-tubes, nano-columns, nano-wires, and molecular-sized electronic components. etc. It overcomes the shortcomings of time-consuming, high cost, small quantity and small area of ​​lithography in the past. It can also be used as a carrier for the luminescence research of trace rare earth met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/12C25D11/16C25D11/24
Inventor 王海辉陈静娟
Owner SOUTH CHINA UNIV OF TECH
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