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Method for preparing nano porous copper by adopting Cu-Zn alloy

A technology of nanoporous copper and cu-zn, which is applied in the field of preparing nanoporous copper, can solve the problems of uneven pore size, high price, unclear ligament contour, etc., and achieve the effect of small and uniform pore size and clear ligament contour.

Inactive Publication Date: 2011-01-26
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the relevant research on nanoporous copper is mainly to prepare nanoporous copper by dealloying Zr-Cu, Mn-Cu, Mg-Cu, Al-Cu and other binary alloy systems, but the defects of these methods are The preparation of the matrix alloy is complex, the price is high, the size of the pores is not uniform, and the outline of the ligament is not clear

Method used

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  • Method for preparing nano porous copper by adopting Cu-Zn alloy
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  • Method for preparing nano porous copper by adopting Cu-Zn alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh copper powder 60g (purity 99.9%) and pure zinc block 90g (purity 99.9%) by weight percentage Cu-wt60%Zn, place in a graphite crucible, and smelt under nitrogen protection. The main process of smelting is: from room temperature, heating to 520°C after 20 minutes, holding at 520°C for 40 minutes, heating to 950°C after 40 minutes, holding at 950°C for 60 minutes, cooling to 350°C after 120 minutes, Keep the temperature at 350°C for 120 minutes, and then cool down to room temperature with the furnace to obtain Cu-wt60%Zn alloy.

[0020] Prepare 1M NaCl solution as the electrolyte, and use the calomel electrode as the reference electrode and the platinum electrode as the auxiliary electrode in the CHI660D electrochemical workstation, and use the three-electrode method to test the Tafel curve to obtain the alloy Cu-wt60%Zn The most susceptible to corrosion voltage is 0.9V.

[0021] Using the most easily corroded voltage obtained in the previous step, in the MCP-1 pote...

Embodiment 2

[0023] Weigh copper powder 45g (purity 99.9%) and pure zinc block 105g (purity 99.9%) by weight percentage Cu-wt70%Zn, place in a graphite crucible and melt under nitrogen protection. The main process of smelting is: from room temperature, heating to 510°C after 25 minutes, holding at 510°C for 35 minutes, heating to 940°C after 35 minutes, holding at 940°C for 50 minutes, cooling to 340°C after 110 minutes, Keep the temperature at 340°C for 110 minutes, and then cool down to room temperature with the furnace to obtain Cu-wt70%Zn alloy.

[0024] Prepare 1M NaCl solution as the electrolyte, and use the calomel electrode as the reference electrode and the platinum electrode as the auxiliary electrode in the CHI660D electrochemical workstation, and use the three-electrode method to test the Tafel curve to obtain the alloy Cu-wt70%Zn The most corrosive voltage is 1.0V.

[0025] Using the most easily corroded voltage obtained in the previous step, in the MCP-1 potentiostat, the ca...

Embodiment 3

[0027] Weigh copper powder 30g (purity 99.9%) and pure zinc block 120g (purity 99.9%) by weight percentage Cu-wt80%Zn, place in a graphite crucible and melt under nitrogen protection. The main process of smelting is: from room temperature, heating to 500°C in 30 minutes, holding at 500°C for 30 minutes, heating to 920°C in 30 minutes, holding at 920°C for 60 minutes, cooling to 330°C in 100 minutes, Keep the temperature at 330°C for 100 minutes, and then cool down to room temperature with the furnace to obtain Cu-wt80%Zn alloy.

[0028] Prepare 1M NaCl solution as the electrolyte, and use the calomel electrode as the reference electrode and the platinum electrode as the auxiliary electrode in the CHI660D electrochemical workstation, and use the three-electrode method to test the Tafel curve to obtain the alloy Cu-wt80%Zn The most susceptible to corrosion voltage is 1.25V.

[0029] Using the most easily corroded voltage obtained by the above method, in the MCP-1 potentiostat, ...

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Abstract

The invention discloses a method for preparing nano porous copper by adopting Cu-Zn alloy. The method comprises the following steps of: preparing copper and zinc in a proportion that the copper is 60 weight percent or 70 weight percent or 80 weight percent of the zinc under the protection of nitrogen to obtain alloys by adopting a smelt technology; carrying out Tafel curve testing by taking a 1M NaCl solution as an electrolyte and utilizing a three-electrode method to obtain easies corrosion voltages of different alloys; carrying out water bath at 50-70 DEG C in the 1M NaCl solution under the condition that the volume ratio of corrosive liquid to the alloy volume is (1,000-1,500):1; carrying out electrochemical corrosion on the alloys under the easies corrosion voltages; dropwise adding 1-2ml of concentrated NH3.H2O solution every other 20 minutes to ensure that the electrolyte contains certain complex compounds to promote the reaction; and stopping the reaction until the cathode does not discharge obvious bubbles any more to obtain the nano porous copper. The nano porous copper prepared through the method has the advantages that the aperture is fine and small, the ligament outline is clear, the aperture is 50-200nm, and the ligament width is 70-100nm.

Description

technical field [0001] The invention belongs to the technical field of nanoporous metal material preparation, and in particular relates to a method for preparing nanoporous copper by using an electrochemical method with a Cu-Zn alloy as a matrix. Background technique [0002] Metal nanoporous materials not only have large internal surface area, high porosity and relatively uniform nanopores of nanomaterials, but also have excellent properties such as high thermal conductivity, high electrical conductivity, anti-corrosion, and anti-fatigue of metal materials, so they are used in catalysis and separation. scientifically important applications. In addition, the surface effect and size effect exhibited by metal nanoporous materials make them have great application prospects in electronics, optics, microfluidics and micromechanics. [0003] At present, the relevant research on nanoporous copper is mainly to prepare nanoporous copper by dealloying Zr-Cu, Mn-Cu, Mg-Cu, Al-Cu and o...

Claims

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Application Information

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IPC IPC(8): C22C1/08C22C9/04
Inventor 梁淑华毛蓉邹军涛王献辉
Owner XIAN UNIV OF TECH
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