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Preparation method of high-strength nano-porous nickel film

A nanoporous nickel, high-strength technology, applied in the field of high-strength nanoporous nickel membranes, can solve the problems of high production cost, product size limitation, pore size distribution and pore size influencing factors that are difficult to control, and achieve the effect of low cost and simple method.

Inactive Publication Date: 2014-05-07
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of porous metal materials by traditional powder metallurgy or dealloying has its own shortcomings. Most of the former need to add pore-forming agents or foaming agents, the production cost is high, the size of the product is limited, and the pore size distribution and pore size influencing factors are difficult to control. Although the porosity and pore size of the latter can be well controlled, the strength of the nanoporous metal prepared by the direct dealloying method is very low, which limits its application.

Method used

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  • Preparation method of high-strength nano-porous nickel film
  • Preparation method of high-strength nano-porous nickel film
  • Preparation method of high-strength nano-porous nickel film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh 1.6g of nickel powder and 2.4g of nickel-aluminum alloy powder (the particle size of nickel powder and nickel-aluminum alloy powder are both 300 mesh, and nickel-aluminum alloy powder contains 40at.% nickel), put them in the same container and put the mixture Mix the materials by machine for 2 hours to obtain a uniformly mixed powder material, pour 0.05g of the mixed powder into a φ8mm circular cavity mold, and use a powder tablet machine to press the green body at 946MPa; In the quality ark, place the porcelain ark in the middle area of ​​the tubular muffle furnace, first pass argon to exhaust the air, then raise the temperature to 850 ℃ in a hydrogen atmosphere, and calcine at this temperature for 2 hours, and then reduce to room temperature with the furnace , powder metallurgy nickel-aluminum alloy sheet is obtained. Prepare a 6mol / L NaOH solution with a beaker, soak the alloy flakes in the NaOH solution for free corrosion and de-alloying, and then put the beak...

Embodiment 2

[0041]Weigh 0.8g of nickel powder and 3.2g of nickel-aluminum alloy powder (the particle size of nickel powder and nickel-aluminum alloy powder are both 300 mesh, and nickel-aluminum alloy powder contains nickel: 30at. After mixing the material with the feeder for 2 hours, after obtaining a uniformly mixed powder material, take 0.05g of the mixed powder and pour it into a φ8mm circular cavity mold, and use a powder tablet machine to press the green body at 946MPa; take the formed green body and put it into In the porcelain ark, place the porcelain ark in the middle area of ​​the tubular muffle furnace, first pass argon to exhaust the air, then raise the temperature to 850 ℃ in a hydrogen atmosphere, and calcine at this temperature for 2 hours, and then drop to 850 °C with the furnace. At room temperature, powder metallurgy nickel-aluminum alloy sheets are prepared. Prepare a 1mol / L NaOH solution with a beaker, soak the alloy flakes in the NaOH solution for free corrosion and d...

Embodiment 3

[0043] Weigh 0.4g of nickel powder and 3.6g of nickel-aluminum alloy powder (the particle size of nickel powder and nickel-aluminum alloy powder are both 300 mesh, nickel-aluminum alloy powder contains nickel: 30at. After mixing the material with the feeder for 2 hours, after obtaining a uniformly mixed powder material, take 0.05g of the mixed powder and pour it into a φ8mm circular cavity mold, and use a powder tablet machine to press the green body at 946MPa; take the formed green body and put it into In the porcelain ark, place the porcelain ark in the middle area of ​​the tubular muffle furnace, first pass argon to exhaust the air, then raise the temperature to 900 ℃ in a hydrogen atmosphere, and calcine at this temperature for 2 hours, and then decrease to 900 °C with the furnace. At room temperature, powder metallurgy nickel-aluminum alloy sheets are prepared. Use a beaker to prepare a 4mol / L NaOH solution, soak the alloy sheet in the NaOH solution for free corrosion and...

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Abstract

The invention discloses a preparation method of a high-strength nano-porous nickel film, and belongs to the technical field of a nano-porous metal film material, in particular discloses a method for preparing a high-strength nano-porous metal film material combining a micron-sized reinforcing framework and nano-sized pores through mixing alloy and metal powder, implementing powder metallurgy to obtain an alloy sheet, and further dealloying the sintered alloy sheet. The preparation method, through preparing a film precursor by powder metallurgy and selective corrosion in junction with dealloying, can increase the number of pores, and simultaneously keep high strength; aperture of the nano-porous metal film is adjustable from 0.5nm to 100nm when controlling various reaction conditions and parameters. The entire process, which is implemented in a stable environment, is safe, reliable, pollution-free, simple, low in cost and up to industrial demand, so that the prepared nano-porous metal film material is applicable to such aspects as biological medicine, organic synthesis, organic solvent micro and nano-filtration, catalysis and the like.

Description

technical field [0001] The invention relates to the technical field of nano-porous metal film materials, in particular to a nano-porous nickel film prepared by mixing a nickel-based alloy with nickel powder, performing powder metallurgy to obtain alloy flakes, and further de-alloying the sintered alloy flakes to obtain a high-strength nano-porous nickel film. method. technical background [0002] Porous metal materials mostly refer to powder metallurgy sintered bodies with low porosity or processed metal materials containing a large number of connected pores. According to the scope of application, metal membranes can be divided into dense metal membranes and porous metal membranes. Dense metal membranes were first produced in the 1960s and were used for gas separation and purification. Porous metal membranes were first produced in the 1940s. To separate uranium isotopes, porous metal membranes have been invented, and the separation process is to use the pores between powder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/44C25F3/02C22C1/04
Inventor 康建立邹程雄张兴祥李建新乔志军
Owner TIANJIN POLYTECHNIC UNIV
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