Electrolyte and method for preparing aluminum oxide template with big hole pitch

Abstract

The invention provide electrolyte and a method for preparing an aluminum oxide template with big hole pitch. The electrolyte consists of oxalic acid, sodium tungstate, ammonium dihydrogen phosphate or boric acid or ammonium adipate and the balance of deionized water. The method comprises the following steps of: 1, pre-treatment; and 2, anodic oxidation. The method can be implemented easily, and the prepared aluminum oxide template with big hole pitch has the characteristics that: the oxidation voltage is high, the hole pitch is big, the maximum hole pitch is 1,3mu m, and the hole pitch is controllable, the limitation existing in the convention preparation method that the membrane with big hole pitch cannot be prepared by porous oxidation, and the application field of the aluminum anodic oxidation membrane is widened; the porous oxidation membrane with different hole size and big cell size is obtained, and the difficulty of filling materials is reduced; and the thickness reaches 8.6mu m in 15 minutes, the membrane coating is thick, the hardness is high, and the surface corrosion resistance and the surface abrasion resistance are enhanced.

Description

1. Technical field [0001] The invention relates to the technical field of application of aluminum anodized film plates, and relates to an electrolyte solution and a method for preparing aluminum oxide templates with large hole spacing. 2. Background technology [0002] In recent years, aluminum porous anodic oxide films have been widely used, and are often used as main materials for templates or nanowires, nanotubes, nanorods, etc. Nanoporous films are often used in a variety of ultra-high-density magnetic memory devices with memory characteristics, thermoelectric materials, Biological detectors, photocatalysis and various microelectronic devices, nano devices, catalysts, metal deposition and semiconductor templates, etc. [0003] In the known aluminum anodized film plate process, the following methods are usually used: [0004] 1. Firstly, pre-treat the foil: carry out alkaline cleaning on the light foil of the aluminum electrolytic capacitor to be corroded. The alkaline c...

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Problems solved by technology

[0009] 2. The experimental conditions are harsh, the current density is low, and the reaction temperature is very low (0-5°C)

[0010] 3. Although the 450V porous oxide film is prepared by using organic solvents, the shape is irregular and the pore spacing is only 900nm. At the same time, organic solvents are volatile and flammable, and there are certain safety hazards

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