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Fast stable growth process of alumina film with nanometer pore array in relatively great pore distance

An alumina nanometer and growth method technology, which is applied to the preparation field of the nanomaterial technology field, can solve the problems affecting the overall quality of the porous alumina film, the film cannot grow stably, etc., and achieves the uniformity of pore size and the orderly degree of pore arrangement. The effect of high orderly arrangement of pores and stable and rapid growth

Inactive Publication Date: 2007-06-06
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that due to the ablation phenomenon, the film cannot grow stably, which affects the overall quality of the porous alumina film.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The electrolyte consists of H 2 O, C 2 h 5 OH and H 3 PO 4 formulated, where H 2 O and C 2 h 5 OH volume ratio is 4:1, H 3 PO 4 The content is 0.25mol / L, and the total volume of the electrolyte is 2L. Soak a circular aluminum sheet with a diameter of 2 cm (purity greater than or equal to 99.999%) in acetone for 20 minutes, wipe the surface with a cotton ball, rinse with deionized water, and use perchloric acid with a volume ratio of 1:4 The mixed solution with ethanol was electrochemically polished under constant pressure. Use a low-temperature constant temperature tank to lower the temperature of the electrolyte to -5°C, and use conventional stirring means to place the aluminum sheet at an anode voltage of 195V and a current density of 1500mA / m 2 Corrosion for 5 minutes at a time under certain conditions. The sample after the primary corrosion was immersed in a mixed aqueous solution of phosphoric acid (6wt.%) and chromic acid (1.8wt.%) at a temperature of 6...

Embodiment 2

[0017] The electrolyte consists of H 2 O, C 2 h 5 OH and H 3 PO 4 formulated, where H 2 O and C 2 h 5 OH volume ratio is 4:1, H 3 PO 4 The content is 0.3mol / L, and the total volume of the electrolyte is 2L. Soak a circular aluminum sheet with a diameter of 2 cm (purity greater than or equal to 99.999%) in acetone for 20 minutes, wipe the surface with a cotton ball, rinse with deionized water, and use perchloric acid with a volume ratio of 1:4 The mixed solution with ethanol was electrochemically polished under constant pressure. Use a low-temperature constant temperature tank to lower the temperature of the electrolyte to -6°C, and use conventional stirring means to place the aluminum sheet at an anode voltage of 195V and a current density of 2000mA / m 2 Corrosion for 3 minutes at a time under certain conditions. The sample after the primary corrosion was soaked in a mixed aqueous solution of phosphoric acid (6wt.%) and chromic acid (1.8wt.%) at a temperature of 60°C...

Embodiment 3

[0019] The electrolyte consists of H 2 O, C 2 h 5 OH and H 3 PO 4 formulated, where H 2 O and C 2 h 5 OH volume ratio is 4:1, H 3 PO 4 The content is 0.5mol / L, and the total volume of the electrolyte is 2L. Soak a circular aluminum sheet with a diameter of 2 cm (purity greater than or equal to 99.999%) in acetone for 20 minutes, wipe the surface with a cotton ball, rinse with deionized water, and use perchloric acid with a volume ratio of 1:4 The mixed solution with ethanol was electrochemically polished under constant pressure. Use a low-temperature constant temperature tank to lower the temperature of the electrolyte to -10°C, and use conventional stirring means to place the aluminum sheet at an anode voltage of 195V and a current density of 4000mA / m 2 Corrosion for 2 minutes at a time under certain conditions. The sample after the primary corrosion was soaked in a mixed aqueous solution of phosphoric acid (6wt.%) and chromic acid (1.8wt.%) at a temperature of 60°...

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Abstract

The fast stable growth process of alumina film with nanometer pore array in relatively great pore distance includes the following steps: 1. compounding electrolyte solution with H3PO4, C2H5OH and water; 2. pre-treating aluminum sheet through soaking in acetone, wipping, rinsing with deionized water and electrochemical polishing with mixed solution of perchloric acid and ethanol; 3. the first etching of the aluminum sheet in the electrolyte solution at -5 to -10 deg.c under the action of anode oxidizing voltage of 195V and current density of 1500-4000A / sq m; 4. soaking the aluminum sheet in water solution of chromic acid at 60 deg.c to eliminate alumina generated in the first etching; and 5. the second etching of the aluminum sheet in the same condition as that in the step 3.

Description

technical field [0001] The invention relates to a preparation method in the technical field of nanomaterials, in particular to a method for rapidly and stably growing an aluminum oxide nanohole array membrane with relatively large pore spacing. Background technique [0002] The aluminum oxide film synthesized by anodic corrosion technology has important applications in metal anti-corrosion protection, metal coloring, metal strength design, etc. The research on the structure design of the film and its synthesis process has attracted more and more attention and interest. . From 1953 to the work of the Aluminum Research Laboratory of the American Aluminum Preparation Company until the mid-1990s, the research systems of the researchers engaged in this work were mainly dense alumina membranes and disordered porous alumina membranes. In 1995, H.Masuda, Department of Chemistry, Kyoto University, Japan reported the synthesis of Al 2 o 3 Ordered Nanopore Array Membranes. Due to i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/04
Inventor 郑茂俊李严波马荔沈文忠
Owner SHANGHAI JIAO TONG UNIV
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