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A method for preparing metal foam that effectively increases the specific surface area

A technology of metal foam and specific surface area, applied in the field of metal foam preparation

Active Publication Date: 2019-07-05
无锡荣峻环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention aims to provide a metal foam preparation method that effectively increases the specific surface area. Based on the difference in diffusion rate of dissimilar metals in the process of interdiffusion at high temperature, the temperature is rapidly lowered when the diffusion is most intense to allow the diffusion reaction Stop quickly, so that the defects such as vacancies and holes left by incomplete diffusion are retained, forming a super high specific surface area metal foam

Method used

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  • A method for preparing metal foam that effectively increases the specific surface area
  • A method for preparing metal foam that effectively increases the specific surface area
  • A method for preparing metal foam that effectively increases the specific surface area

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Perform conductive treatment on 45PPI polyurethane foam to realize electrodeposition of nickel metal element, and obtain 45PPI bulk density of 0.3g / cm 3 Nickel foam with a specific surface area of ​​2000cm 2 / cm 3 . The nickel foam was heat-treated at 900° C. for 1 hour in a hydrogen atmosphere to remove polyurethane. Metal copper is then electrodeposited on the heat-treated nickel foam to obtain a 45PPI bulk density of 0.6g / cm 3 Foamed nickel-copper alloy, under the protective atmosphere of nitrogen, argon or helium, diffusion heat treatment was carried out at 800 °C for 8 hours, and then rapidly cooled to room temperature at a cooling rate of 10 °C / min to obtain a specific surface area of ​​45 PPI. 6800cm 2 / cm 3 Compared with the original metal foam, the specific surface area of ​​the foamed nickel-copper alloy with ultra-high specific surface area has been increased by more than three times.

[0025] Obtain the surface morphology schematic diagram of foamed ni...

Embodiment 2

[0027] Conduct conductive treatment on 100PPI polyurethane foam, and electrodeposit nickel metal element to obtain 100PPI bulk density of 0.15g / cm 3 Nickel foam with a specific surface area of ​​6500cm 2 / cm 3 . The nickel foam was heat-treated at 800° C. in a hydrogen atmosphere for 1.5 hours to remove polyurethane. Metal iron is then vapor-deposited on the heat-treated foamed nickel to obtain a bulk density of 0.22g / cm at 100PPI 3 foamed nickel-iron alloy. Put the foamed nickel-iron alloy at a temperature of 950°C and a vacuum degree of less than 1*10 -2 Diffusion heat treatment was carried out for 10 hours under the high vacuum condition of Pa, and then rapidly cooled to room temperature at a cooling rate of 10°C / min to obtain a specific surface area of ​​15000cm 2 / cm 3 Compared with the original metal foam, the specific surface area of ​​the nickel-iron alloy foam with ultra-high specific surface area has been increased by more than two times. The surface morpholog...

Embodiment 3

[0029] Perform conductive treatment on 120PPI polyurethane foam, and electrodeposit copper metal element to obtain 120PPI bulk density of 0.18g / cm 3 Copper foam with a specific surface area of ​​6000cm 2 / cm 3 . Heat treatment was performed at a temperature of 700° C. for 3 hours in a hydrogen atmosphere to remove polyurethane. Metal iron is then electrodeposited on the heat-treated foamed copper to obtain a bulk density of 0.24g / cm at 120PPI 3 foamed copper-iron alloy. Foam copper-iron alloy at a temperature of 980°C and a vacuum of less than 1*10 -1 Diffusion heat treatment was carried out for 14 hours under the high vacuum condition of Pa, and then rapidly cooled to room temperature at a cooling rate of 10°C / min to obtain a specific surface area of ​​18500cm 2 / cm 3 Compared with the original metal foam, the specific surface area of ​​the copper-iron alloy foam with ultra-high specific surface area has been increased by more than three times. The surface morphology o...

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Abstract

The invention discloses a foam metal preparation method which can effectively increase the specific surface area. Firstly, conductive treatment is carried out on the polyurethane foam, and at least one metal is electrodeposited to obtain a foam metal matrix, and then the obtained foam metal matrix is ​​subjected to heat treatment in a hydrogen atmosphere to obtain Remove the polyurethane, and then deposit a metal material different from the metal foam substrate on the metal foam substrate to obtain a metal foam alloy; place the metal foam alloy under a protective atmosphere of nitrogen, argon or helium, or in a vacuum less than 1*10 ‑1 Diffusion heat treatment is carried out under the vacuum condition of Pa, and rapid cooling is performed after the diffusion heat treatment, and finally a foam metal alloy with an ultra-high specific surface area is obtained. The present invention is based on the difference in diffusion rate of dissimilar metals in the process of interdiffusion at high temperature. When the diffusion is most intense, the temperature is rapidly lowered to stop the diffusion reaction quickly, thereby retaining the defects such as vacancies and holes left by incomplete diffusion, forming a Ultra-high specific surface area metal foam.

Description

technical field [0001] The invention relates to the technical field of metal foam preparation, in particular to a method for preparing metal foam that effectively increases the specific surface area. Background technique [0002] Foam metal material is an excellent functional environmental protection material, which integrates mechanical, thermal, electrical, acoustic and other properties, and has an irreplaceable important position in the field of materials. High porosity and high specific surface area are the structural characteristics and important characteristics of metal foam, and also the key properties that determine the obvious application advantages of metal foam in the fields of sound absorption and energy absorption, damping and noise reduction, electromagnetic shielding, filtration and separation. At present, the preparation of three-dimensional network open-cell metal foam mainly adopts the method of electrodeposition and vapor deposition, and the surface of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D5/54C22C1/08
CPCC22C1/08C22C1/082
Inventor 钟一锋吴江明孙兆荣
Owner 无锡荣峻环保科技有限公司