Method for preparing copper base composite material by chemical precipitation method to obtain composite powder

A technology of copper-based composite materials and chemical precipitation method, which is applied in the field of preparation of nanocomposite materials, can solve the problems of inability to accurately control the amount of oxygen supplied by the internal oxidation method, and the inability to accurately control the ratio.

Inactive Publication Date: 2007-01-24
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are more or less problems in these methods: for example, the mechanical alloying method cannot completely open the nano-scale Al 2 o 3 powder, the oxygen supply of the internal oxidation method cannot be precisely controlled, and the powder electroless copper plating method cannot precisely control the ratio of the two

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) First, prepare nano-Al by chemical precipitation method 2 o 3 -CuO composite powder:

[0046] Operating conditions: The temperature of the constant temperature water bath is set at 25°C;

[0047] Mother liquor and precipitant: Al in copper matrix composite 2 o 3 The content is 5% (mass fraction) as an example, weigh 0.75g of NH 4 Al(SO 4 ) 2 and 6.25g of CuSO 4 , add water to make a 200ml solution, according to NH 4 Al(SO 4 ) 2 and NH 4 HCO 3 The molar ratio is 1:4 and CuSO 4 with NH 4 HCO 3 A molar ratio of 1:2 determines 4.47 g of NH 4 HCO 3 , add water to make a 200ml solution; in order to make CuSO 4 ·5H 2 O and NH 4 Al(SO 4 ) 2 12H 2 O completely reacts, and makes up for the waste in the dropping process, NH 4 HCO 3 Should be appropriate excess, so, weigh 4.5g of NH 4 HCO 3 , add water to make a 205ml solution;

[0048] Surfactant: sodium hexametaphosphate 0.2mg;

[0049] Operation steps: A. NH that will be configured according to th...

Embodiment 2

[0059] (1) First, prepare nano-Al by chemical precipitation method 2 o 3 -CuO composite powder:

[0060] Operating conditions: The temperature of the constant temperature water bath is set at 28°C;

[0061] Mother liquor and precipitant: Al in copper matrix composite 2 o 3 The content is 3% (mass fraction) as an example, weigh 0.44g of NH 4 Al(SO 4 ) 2 and 6.25g of CuSO 4 , add water to make a 200ml solution, according to NH 4 Al(SO 4 ) 2 and NH 4 HCO 3 The molar ratio is 1:4 and CuSO 4 with NH 4 HCO 3 A molar ratio of 1:2 determines 4.26 g of NH 4 HCO 3 , add water to make a 200ml solution; in order to make CuSO 4 ·5H 2 O and NH 4 Al(SO 4 ) 2 12H 2 O completely reacts, and makes up for the waste in the dropping process, NH 4 HCO 3 Should be appropriate excess, so, weigh 4.3g of NH 4 HCO 3 , add water to make a 205ml solution;

[0062] Surfactant: sodium hexametaphosphate 0.2mg;

[0063] Operation steps: A. NH that will be configured according to th...

Embodiment 3

[0073] (1) First, prepare nano-Al by chemical precipitation method 2 o 3 -CuO composite powder:

[0074] Operating conditions: The temperature of the constant temperature water bath is set at 30°C;

[0075] Mother liquor and precipitant: Al in copper matrix composite 2 o 3 The content is 1% (mass fraction) as an example, weigh 0.144g of NH 4 Al(SO 4 ) 2 and 6.25g of CuSO 4 , add water to make a 200ml solution, according to NH 4 Al(SO 4 ) 2 and NH 4 HCO 3 The molar ratio is 1:4 and CuSO 4 with NH 4 HCO 3 A molar ratio of 1:2 determines 4.1 g of NH 4 HCO 3 , add water to make a 200ml solution; in order to make CuSO 4 ·5H 2 O and NH 4 Al(SO 4 ) 2 12H 2 O completely reacts, and makes up for the waste in the dropping process, NH 4 HCO 3 Should be appropriate excess, so, weigh 4.2g of NH 4 HCO 3 , add water to make a 205ml solution;

[0076] Surfactant: sodium hexametaphosphate 0.2mg;

[0077] Operation steps: A. NH that will be configured according to th...

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PUM

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Abstract

The process of preparing copper base composite material with composite powder prepared through chemical precipitation includes the following steps: dropping ammonium bicarbonate into mother liquid comprising copper sulfate and aluminum ammonium sulfate at 25-30 deg.c to obtain settled NH4Al(OH)2CO3-Cu2(OH)2CO3 sol, ageing for 8 hr and centrifuging to obtain NH4Al(OH)2CO3 -Cu2(OH)2CO3 gel, washing the gel with anhydrous alcohol, centrifuging to eliminate alcohol and stoving and grinding at 50deg.c to obtain NH4Al(OH)2CO3-Cu2(OH)2CO3 precursor, igniting the precursor at 1100-1200 deg.c to obtain composite Al2O3-CuO powder, reducing the composite Al2O3-CuO powder in reducing methanol or hydrogen atmosphere at 350 deg.c for 0.5-1 hr to obtain composite Al2O3-Cu powder; cold pressing the composite Al2O3-Cu powder at 100 kN pressure to form blank, and final at 800-850 deg.c. The present invention has precisely controlled Al2O3 content for required wear resistance and conductivity.

Description

Technical field [0001] The invention relates to a method for preparing a nanocomposite material, in particular to a method for preparing a copper-based composite material by using a chemical precipitation method to obtain composite powder. Background technique [0002] Dispersion-strengthened copper-based composite materials refer to the formation of second-phase particles with good thermal stability dispersed in the copper matrix through a certain process, thereby improving the strength and high-temperature stability of the material. Because copper-based composite materials have excellent electrical and thermal conductivity, high temperature stability and high strength, they have great application potential in high-tech fields such as electromechanical, aerospace, and microelectronics, and have been widely used in large-scale integrated circuit lead frames and welding electrodes. , transfer switches, electrical contacts, etc., are the key materials for the development of mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04B22F9/16
Inventor 丁红燕周广宏章跃符学龙韩晓萍
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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