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Method for preparing porous alumina formwork with Y type structure

A porous alumina and template technology, applied in the field of materials, can solve the problems of slow reaction speed, limited template pore size, prolonged preparation time, etc., and achieve the effects of short reaction time, widening the range of pore size, and rapid reaction speed.

Inactive Publication Date: 2009-06-10
ANHUI UNIVERSITY
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  • Abstract
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Problems solved by technology

Using the method of reducing the voltage to prepare the alumina template, the size of the template aperture is limited, which is not conducive to the development of this technology; in addition, the reaction speed is getting slower and slower when the alumina template is prepared at lower and lower voltages, and the preparation time will be greatly reduced. Prolonged, increasing the time and cost of preparing templates

Method used

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  • Method for preparing porous alumina formwork with Y type structure

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Embodiment Construction

[0031] The embodiments of the present invention are described in detail below: this embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following embodiments.

[0032] This embodiment is implemented under the following implementation conditions and technical requirements:

[0033] First, high-purity aluminum sheets (Al, 99.999%) are soaked in a mixed solution of acetone and ethanol to remove dirt on the surface of the aluminum sheet, and then the aluminum sheet is placed in a tube-type vacuum furnace at 500 degrees Celsius for 6 hours to eliminate Stress in an aluminum sheet. The annealed aluminum sheet is immersed in a mixed acid solution composed of phosphoric acid and nitric acid, and chemically polished to obtain an aluminum sheet with a bright and smooth surface.

[0034] Then the polished alum...

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Abstract

The invention discloses a method for preparing a porous aluminum oxide mould plate with Y-shaped structure. The method comprises the following steps: firstly, an aluminum sheet is annealed and chemically polished; secondly, the treated aluminum sheet is subjected to anode oxidation at a low voltage for some time; thirdly, the oxide layer generated during the first-time oxidation is washed off in an phosphoric acid / chromic acid mixing solution; fourthly, at a low voltage, the aluminum sheet is subjected to secondary anode oxidation for some time, and during the period of time, the oxidation voltage is raised, and the aluminum sheet is subjected to anode oxidation at a high voltage for some time; and finally, the prepared aluminum oxide mould plate is taken out, the barrier layer on the bottom part of the mould plate is further removed by phosphoric acid, so that the two-way porous aluminum oxide mould plate with Y-shaped structure. The method is not only widely applied to the preparation of various materials with one-dimensional nano structure, but also has potential purposes in the fields of the preparation of nano devices, photonic crystals and the like.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a method for preparing a porous alumina template with a Y-shaped structure. Background technique [0002] Due to its regular ordered structure and unique physical and chemical stability, porous alumina templates have been widely used in the preparation of one-dimensional nanomaterials, as well as in the fields of photonic crystals and assembled nanodevices. At present, the technology for preparing alumina templates is relatively mature, and the patents related to the preparation method of alumina templates that have been published in China are as follows: [0003] 1. 03136606.6, discloses a production process of nanoporous alumina template, which is characterized by simple process, low cost, uniform and orderly distribution of holes in the product, high hole density, controllable shape and size of holes, and pore diameters of several ranging from nanometers to 100 nanometers. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/08
Inventor 毕红孙俊
Owner ANHUI UNIVERSITY
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