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Preparation method of three-dimensional penetrating anode aluminum oxide template

A technology of anodized aluminum and aluminum oxide templates, applied in anodizing, electrolytic coatings, surface reaction electrolytic coatings, etc., can solve the problem of tubular structure that only pays attention to the order of pores and upper and lower penetration, and ignores the application value of three-dimensional penetration templates, etc. problem, to achieve the effect of good integrity

Inactive Publication Date: 2013-09-18
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most researchers only pay attention to its pore order and tubular structure through up and down, while ignoring its potential application value as a three-dimensional through-template

Method used

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  • Preparation method of three-dimensional penetrating anode aluminum oxide template
  • Preparation method of three-dimensional penetrating anode aluminum oxide template

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) First, cut the high-purity aluminum sheet (Al, 99.999%) into a disc with a diameter of 20mm and a thickness of 0.2mm, and soak it in a mixed solution of acetone and ethanol (volume ratio 1:1) to remove the surface of the aluminum sheet. Dirt, then put the aluminum sheet in a tube vacuum furnace at 550 degrees Celsius for 6 hours to eliminate the stress in the aluminum sheet. The annealed aluminum sheet is immersed in a mixed acid solution of 75% phosphoric acid and 65% nitric acid (volume ratio of phosphoric acid, concentrated nitric acid and double distilled water 8: 1:1), and chemically polished to obtain a bright and smooth surface Aluminum sheet.

[0025] (2) Using the aluminum sheet processed in step (1) as the anode and the copper sheet as the cathode, the polished aluminum sheet is subjected to a staged variable pressure cycle treatment to obtain an alumina template with irregular pore diameters. Boost from 40 volts to 70 volts at a rate of 1 volt per minute, a...

Embodiment 2

[0029] (1) First cut the high-purity aluminum sheet (Al, 99.999%) into a disc with a diameter of 20 mm and a thickness of 0.2 mm, and soak it in a mixed solution of acetone and ethanol (volume ratio 1:1) to remove the aluminum sheet Then put the aluminum sheet in a tube vacuum furnace at 530 degrees Celsius for 8 hours to eliminate the stress in the aluminum sheet. The annealed aluminum sheet is immersed in a mixed acid solution of 65% by mass phosphoric acid and 65% by mass nitric acid (the volume ratio of phosphoric acid, concentrated nitric acid and double distilled water is 8: 1:1), and chemically polished to obtain a bright and smooth surface Aluminum sheet.

[0030] (2) Using the aluminum sheet processed in step (1) as the anode and the copper sheet as the cathode, the polished aluminum sheet is subjected to a staged variable pressure cycle treatment to obtain an alumina template with irregular pore diameters. Boost from 40 volts to 65 volts at a rate of 2 volts per minute...

Embodiment 3

[0034] (1) First cut the high-purity aluminum sheet (Al, 99.999%) into a disc with a diameter of 20 mm and a thickness of 0.2 mm, and soak it in a mixed solution of acetone and ethanol (volume ratio 1:1) to remove the aluminum sheet Then put the aluminum sheet into a tube vacuum furnace at 500 degrees Celsius for 12 hours to eliminate the stress in the aluminum sheet. The annealed aluminum sheet is immersed in a mixed acid solution of 80% phosphoric acid and 65% nitric acid (volume ratio of phosphoric acid, concentrated nitric acid and double distilled water 8: 1:1), and chemically polished to obtain a bright and smooth surface Aluminum sheet.

[0035] (2) Using the aluminum sheet processed in step (1) as the anode and the copper sheet as the cathode, the polished aluminum sheet is subjected to a staged variable pressure cycle treatment to obtain an alumina template with irregular pore diameters. Boost from 40 volts to 75 volts at a rate of 1 volt per minute, then stabilize at 7...

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Abstract

The invention discloses a preparation method of a three-dimensional penetrating anode aluminum oxide template. The preparation method comprises the following steps of: firstly, annealing and chemically polishing an aluminum sheet; secondly, oxidizing the treated aluminum sheet for a certain time under cyclic periodical phased variable pressure; thirdly, taking out the prepared aluminum oxide template and using secondary distilled water to clean and wash electrolyte remained on the aluminum oxide template; fourthly, dissolving aluminum base on the back surface of porous aluminum oxide by using an SnCl4 hydrochloric acid aqueous solution, and removing a blocking layer on the back part of the anode aluminum oxide by using a phosphoric acid solution to obtain two-way porous anode aluminum oxide template; and finally, washing the two-way porous anode aluminum oxide template under a certain temperature by using a thin phosphoric acids solution to realize the three-dimensional penetrating anode aluminum oxide template. The invention provides a novel method for preparing the new three-dimensional penetrating anode aluminum oxide template; the template can be used for preparing a metal nanometer network type negative refractive index material, a wave absorbing material and the like.

Description

technical field [0001] The invention relates to a preparation method of a three-dimensional penetrating anodized aluminum template, which belongs to the technical field of new materials. Background technique [0002] The research group of Fan Runhua of Shandong University formed a three-dimensional nickel metal network by pouring metallic nickel into porous alumina, and successfully measured that the nickel metal network in the template has a double negative magnetic permeability and negative permittivity. Negative performance, pioneered a new method in the preparation of double negative materials, see Shi Zhi-cheng, Fan Run-hua, et al. Random Composites of Nickel Networks Supported by Porous Alumina towards Double Negative Materials. Advanced Materials. 2012, 24, 2349-2352; In addition, the invention patent application with application number 201110006345.4 discloses a three-dimensional gradient hole array nanostructure anodized aluminum template and its preparation method,...

Claims

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Application Information

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IPC IPC(8): C25D11/08C25D11/18
Inventor 毕红张云帆
Owner ANHUI UNIVERSITY
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