Method for preparing nanometer porous copper

A nano-porous copper, fast technology, applied in the field of preparation of nano-porous copper, can solve problems such as difficult application, porous copper cannot form a continuous porous structure, complex process, etc., and achieve a simple and easy preparation method, which is convenient for large-scale production and application promising effect

Inactive Publication Date: 2009-12-02
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technologies for preparing nanoporous copper have their own shortcomings and deficiencies.
In Raney copper, due to the low content of copper in the initial alloy, the obtained porous copper cannot form a continuous porous structure
Nanoporous copper is prepared from Mn-Cu alloy, and the obtained nanoporous copper will have a large number of cracks, which will affect its application.
Preparation of nanoporous copper with Cu-Zn alloy is complicated and difficult to apply in industrial production
Preparation of nanoporous copper with Cu-Zr alloy, the size of the pores of the obtained porous copper is relatively large, and it is impossible to dealloy and corrode the bulk alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) The Mg-Cu alloy is heated to a molten state according to the ratio of 33 atomic percent Cu and the rest is Mg, and cast into an ingot. Take a small piece and melt it again, blow out the molten liquid with argon under 0.1MPa pressure, chill it on a high-speed rotating copper roller, and obtain a piece with a thickness of 20-40μm, a width of 2-5mm, and a length of 10-70mm. Alloy strip.

[0015] (2) React with 5% hydrochloric acid solution at room temperature for 0.2 hours, then heat to 90° C., and react for about 0.2 hours until no obvious bubbles are generated, then stop heating.

[0016] (3) The thin strip obtained after the reaction was repeatedly rinsed with distilled water until the chemical corrosion solution was completely washed (the rinsed distilled water was neutral in the extensive pH test paper test). Store in a vacuum box after drying. Porous copper with uniform structure can be obtained. The ligament size of the porous copper is 148±35nm.

Embodiment 2

[0018] (1) According to the ratio of 40 atomic percent Cu and Mg as the rest, the Mg-Cu alloy is heated to a molten state and cast into an ingot. Take a small piece and melt it again, blow out the molten liquid with nitrogen gas under the pressure of 0.1MPa, chill it on a high-speed rotating copper roller, and obtain an alloy with a thickness of 20-40μm, a width of 2-5mm, and a length of 20-100mm thin ribbon.

[0019] (2) React with 5% hydrochloric acid solution at room temperature for 0.3 hours, then heat to 90° C., react for about 0.2 hours, stop heating until no obvious bubbles are generated.

[0020] (3) The thin strip obtained after the reaction was repeatedly rinsed with distilled water until the chemical corrosion solution was completely washed (the rinsed distilled water was neutral in the extensive pH test paper test). Store in a vacuum box after drying. Porous copper with uniform structure can be obtained. The ligament size of the porous copper is 175±27nm.

Embodiment 3

[0022] (1) According to the ratio of 50 atomic percent Cu and Mg as the rest, the Mg-Cu alloy is heated to a molten state and cast into an ingot. Take a small piece and melt it again, blow out the molten liquid under a certain pressure with argon, and chill it on a high-speed rotating copper roller to obtain an alloy with a thickness of 30-50 μm, a width of 2-5 mm, and a length of 20-100 mm thin ribbon.

[0023] (2) React with a sulfuric acid solution with a mass fraction of 10% at room temperature for 1 hour, then heat to 90° C., and react for about 0.5 hour until no obvious bubbles are generated, then stop heating.

[0024] (3) The thin strip obtained after the reaction was repeatedly rinsed with distilled water until the chemical corrosion solution was completely washed (the rinsed distilled water was neutral in the extensive pH test paper test). Store in a vacuum box after drying. Porous copper with uniform structure can be obtained. The ligament size of the porous copp...

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Abstract

The invention belongs to the field of preparing a nanometer material, and particularly relates to a method for preparing nanometer porous copper. In the invention, the nanometer porous copper is prepared by the method combining the rapid solidification, the blow-casting and the dealloying. The method comprises the following steps: firstly, heating pure Mg and Cu are to a molten state, and casting the molten Mg and Cu into a cast ingot; secondly, melting the cast ingot to the molten state again, and utilizing inert gas to quickly blow out an alloy liquid, so that the molten metal is quickly solidified on a copper roller rotating at a high speed, and an alloy ribbon is prepared, or utilizing the inert gas to quickly blow the alloy liquid in a copper die, so that an alloy plate or alloy rod is prepared; and finally, performing dealloying treatment in acid solution. The method has the advantages of simple process, high efficiency and the suitability for mass industrialized production. The method can also control the structure and size of the nanometer porous cooper according to compositions of the master alloy and types of the etchant solution.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, in particular to a preparation method of nanoporous copper. Background technique [0002] Nanoporous metals refer to materials with pores of nanoscale size. Because of the existence of nano-sized pores, the material has a higher specific surface area and some unique physical and chemical properties, mechanical properties, such as unique electrical conductivity, higher chemical activity, higher strength, etc. These make nanoporous materials have extremely broad application prospects. At present, the method of preparing nanoporous metals is mainly to dealloy and corrode binary alloys, corrode the less noble metal elements, and recombine the remaining noble metal elements through diffusion and other methods to form a bicontinuous nanoporous structure. In 1925, American scientist Raney prepared a variety of Raney-based metals by corroding aluminum-based alloys with alkali. During this proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/00B22D11/06C23F1/44
Inventor 张忠华赵长春祁振王孝广
Owner SHANDONG UNIV
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