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Foam copper powder and preparation method thereof

A technology of copper powder and foam, which is applied in the field of foam copper powder and its preparation, can solve the problems of high porosity, high porosity and small pore diameter of foam copper, and achieve the effect of simple process, low cost and high porosity

Active Publication Date: 2016-12-07
KUN SHAN DOTOP METAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to prepare the copper foam required for the inner core of the heat pipe, it is required that the foam copper has a high porosity and a small pore size, while the copper foam prepared in the prior art has a high porosity and a large pore size.
In addition, by adding pore forming agent to the metal powder and sintering the copper foam, too much pore forming agent will remain in the copper matrix, which will affect the performance and application of the material

Method used

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  • Foam copper powder and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Mixing copper oxide powders with a particle size of 38 μm to 75 μm to prepare mixed copper oxide powder;

[0022] 2) Put the mixed copper oxide powder prepared in step 1) into a reduction sintering furnace for reduction sintering, the atmosphere in the reduction sintering furnace is a reducing atmosphere, set the reduction sintering temperature to 850°C, and the reduction sintering time to be more than 40 minutes to obtain a sintered Copper, the porosity of sintered copper is 75%, the reducing atmosphere adopts ammonia decomposition atmosphere, and the volume ratio of hydrogen and nitrogen is 3:1;

[0023] 3) Crush the sintered copper and sieve foamed copper powder with a particle size distribution of 106-250 μm.

Embodiment 2

[0025] 1) Mix copper oxide powder with a particle size of 6.5 μm to 18 μm, copper oxide powder with a particle size of 18 μm to 75 μm, and urea particles at a mass ratio of 2:7:1 to prepare mixed copper oxide powder;

[0026] 2) Put the mixed copper oxide powder prepared in step 1) into a reduction sintering furnace for reduction sintering, the atmosphere in the reduction sintering furnace is a reducing atmosphere, set the reduction sintering temperature to 800°C, and the reduction sintering time to be more than 50 minutes to obtain a sintered Copper, the porosity of sintered copper is 83%, the reducing atmosphere adopts ammonia decomposition atmosphere, and the volume ratio of hydrogen and nitrogen is 3:1;

[0027] 3) Crush the sintered copper and sieve foamed copper powder with a particle size distribution of 106-250 μm.

Embodiment 3

[0029] 1) Mix copper oxide powder with a particle size distribution of 18 μm to 75 μm and sodium chloride particles at a mass ratio of 8:2 to prepare mixed copper oxide powder;

[0030] 2) Put the mixed copper oxide powder prepared in step 1) into a reduction sintering furnace for reduction sintering, the atmosphere in the reduction sintering furnace is a reducing atmosphere, set the reduction sintering temperature to 750°C, and the reduction sintering time to be more than 60 minutes to obtain a sintered Copper, the porosity of sintered copper is 65%, the reducing atmosphere adopts ammonia decomposition atmosphere, and the volume ratio of hydrogen and nitrogen is 3:1;

[0031] 3) Crush the sintered copper and sieve foamed copper powder with a particle size distribution of 106-250 μm.

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Abstract

The invention discloses foam copper powder and a preparation method thereof, and relates to the technical field of copper powder. The preparation raw material of the foam copper powder comprises cupric oxide powder which is formed by mixing cupric oxide powder of different particle sizes. The particle sizes of the cupric oxide powder are 5-75 [mu]m, the porosity is high, and the bore diameter is small. According to the foam copper powder, no pore-forming agent or a few pore-forming agents need to be added, the material performance and application of a copper substrate cannot be influenced, the prepared foam copper powder is high in porosity and small in bore diameter. Parts sintered by the foam copper powder are high in porosity and small in bore diameter. The porosity and the bore diameter can be regulated by mixing cupric oxide powder with different particle size distribution so that the requirements of different products and customers can be met. According to the preparation method of the foam copper powder, the process is simple, the cost is low, and no pollution is generated to the environment.

Description

technical field [0001] The invention relates to the technical field of copper powder, in particular to a copper foam powder and a preparation method thereof. Background technique [0002] Copper foam is a new multifunctional material with a large number of connected or disconnected pores evenly distributed in the copper matrix. It has a high specific surface area and has the characteristics of sound absorption, penetration, filtration and energy absorption. It is used in catalysis, chemical industry, energy and thermal energy. , environmental protection, machinery and other fields have huge market application potential. [0003] The preparation methods of foam copper materials mainly include electrodeposition method, powder metallurgy method, solid-gas eutectic directional solidification method, and infiltration casting method. Among them, the electrodeposition method, the solid-gas eutectic directional solidification method, and the percolation casting method all have the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/22
CPCB22F9/22
Inventor 朱胜利陈文华郭殿月刘茹晶朱金花
Owner KUN SHAN DOTOP METAL TECH CO LTD
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