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Preparation method for foamy copper

A technology of foamed copper and copper powder, which is applied in the field of powder metallurgy to prepare metal porous materials, can solve the problems of not being able to prepare spherical holes, air pollution, etc., and achieve the effects of good shape, easy removal, and easy purchase

Inactive Publication Date: 2014-01-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the potassium carbonate mentioned in the patent CN201210095571.9 as a pore-forming agent, because the domestically produced potassium carbonate is powdery, spherical pores cannot be prepared, and the gas generated by the pyrolysis of potassium carbonate will cause air pollution

Method used

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  • Preparation method for foamy copper
  • Preparation method for foamy copper
  • Preparation method for foamy copper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0030] Embodiment one: the preparation method of the copper foam of this embodiment is:

[0031] (1) Copper powder (copper powder is an irregularly shaped copper powder with a particle size of 100-150 μm, with a purity greater than 99.6%) and pore-forming agent anhydrous calcium chloride spherical particles (with a particle size range of 1.5mm) according to a volume ratio of 30 : 70 ingredients, then add water (the addition of water is 5wt% of the total amount of copper powder and pore-forming agent) as a binder for mixing, and then the mixture is pressed into a billet and dried. The pressure of pressing the billet is 400MPa, The holding time is 10 minutes, and the condition of drying the billet is to dry at 120°C for 5 hours;

[0032] (2) Place the dried billet in an argon or nitrogen atmosphere to sinter at a rate of ℃ / min to 900 ℃ for 3 hours, and then cool with the furnace;

[0033] (3) Soak the sintered billet in running water for 60 minutes, remove the moisture by centr...

Embodiment approach 2

[0034] Embodiment two: the preparation method of the copper foam of this embodiment is:

[0035] (1) Copper powder (copper powder is an irregular-shaped copper powder with a particle size of 40-150 μm, with a purity greater than 99.6%) and pore-forming agent anhydrous calcium chloride spherical particles (with a particle size range of 2mm) according to a volume ratio of 15: 85 ingredients, then add water (the amount of water added is 2wt% of the total amount of copper powder and pore-forming agent) as a binder for mixing, and then press the mixture into a billet and dry it. The pressure of pressing the billet is 500MPa. The pressing time is 5min, and the condition of drying the blank is to dry at 150°C for 4h;

[0036] (2) Place the dried billet in an argon or nitrogen atmosphere at a rate of 5°C / min to 1000°C for sintering for 1 hour, then cool with the furnace;

[0037](3) Soak the sintered billet in running water for 30 minutes, remove the moisture by centrifugation, and t...

Embodiment approach 3

[0038] Embodiment three: the preparation method of the copper foam of this embodiment is:

[0039] (1) Copper powder (copper powder is an irregularly shaped copper powder with a particle size of 40-80 μm, with a purity greater than 99.6%) and pore-forming agent anhydrous calcium chloride spherical particles (with a particle size range of 3.3 mm) according to a volume ratio of 10 : 90 ingredients, then add water (the addition of water is 4wt% of the total amount of copper powder and pore-forming agent) as a binder for mixing, then the mixture is pressed into a billet and dried, the pressure of the pressed billet is 450MPa, The holding time is 8 minutes, and the condition of drying the billet is to dry at 130°C for 4.5 hours;

[0040] (2) Place the dried billet in an argon or nitrogen atmosphere at a rate of 10°C / min to 800°C for sintering for 1 hour, then cool with the furnace;

[0041] (3) Soak the sintered billet in running water for 40 minutes, remove the moisture by centri...

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Abstract

The invention relates to a preparation method for foamy copper, which belongs to the technical field of powder metallurgical preparation of metal porous materials. The preparation method comprises the following steps: batching copper powder and the pore forming agent--an anhydrous calcium chloride spherical particle according to a volume ratio of 10-60: 40-90, then adding water as a bonding agent, carrying out mixing, compacting an obtained mixture into a blank material and drying the blank material; heating the dried blank material in an argon or nitrogen atmosphere at a heating rate of 5 to 10 DEG / min to 800 to 1000 DEG, sintering the blank material for 1 to 3 h and cooling the sintered blank material in a furnace; and soaking the sintered blank material in flowing water for 30 to 60 min, carrying out centrifugation to remove water and carrying out drying so as to prepare the foamy copper. The preparation method has the advantages of simple process, low cost and no pollution to the environment; and the foamy copper prepared by using the method has considerable advantages, e.g., a controllable bore diameter, controllable porosity, a good bore shape and high strength.

Description

technical field [0001] The invention relates to a method for preparing foamed copper, which belongs to the technical field of preparing metal porous materials by powder metallurgy. Background technique [0002] Copper foam is a functional material with a porous structure based on copper. It has excellent electrical and thermal conductivity, and has a large number of three-dimensional porous structures inside the material. At the same time, it has the alkali corrosion resistance, good tensile strength and ductility of metal copper itself, and has good electromagnetic shielding and Noise reduction and shock absorption. It can be widely used in heat conduction and heat dissipation materials, flame retardant materials, phase change energy storage materials, cushioning and shock absorption structural materials, lithium ion or fuel cell electrode materials, sound-absorbing materials, electromagnetic shielding materials, Building decoration materials, filter purification material...

Claims

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Application Information

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IPC IPC(8): C22C1/08C22C9/00
Inventor 钟浩周芸左孝青
Owner KUNMING UNIV OF SCI & TECH
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