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A kind of nanometer copper powder and preparation method thereof

A technology of nano copper powder and copper powder, which is applied in the field of heat treatment, annealing and dealloying to prepare nano copper powder, and mechanical ball milling, can solve the problems of high energy consumption and large equipment investment of nano copper powder, and is conducive to mass production, Low cost of raw materials, time and labor saving effect

Active Publication Date: 2020-02-07
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Simplify the existing cumbersome process of preparing nano-copper powder, adopt a simple and feasible alternative method to prepare nano-copper powder; overcome the bottleneck of nano-copper powder in industrial large-scale production and use, and produce nano-copper powder on a large scale through simple procedures; To overcome the problems of high energy consumption and large equipment investment in the traditional production of nano-copper powder, use simple equipment such as mechanical ball milling, heat treatment annealing and dealloying to prepare nano-copper powder

Method used

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  • A kind of nanometer copper powder and preparation method thereof
  • A kind of nanometer copper powder and preparation method thereof
  • A kind of nanometer copper powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Take 27g of copper element powder and 23g of aluminum element powder, with a total mass of 50g, and then add 0.5g of stearic acid to the mixed powder; take two 500ml stainless steel ball mill jars, and configure stainless steel balls with a total mass of 500g respectively (20 steel balls with a diameter of 16mm, and the rest are 9mm), pour two parts of the above-mentioned mixed powder into two ball mill jars respectively, cover the ball mill jars and tighten the bolts.

[0056] Unscrew the vent port of the ball mill tank, put it into the transitional sealed compartment of the vacuum argon glove box, close the compartment door, carry out the operation of vacuuming and introducing argon gas, repeat three times, and then put the gloves in the argon atmosphere protection Open the door of the transition chamber in the box, close and tighten the air port of the ball mill jar, put it back into the transition chamber, take out the ball mill pot, confirm that the air port of the ...

Embodiment 2

[0064] Take 27g of copper element powder and 23g of aluminum element powder, the total mass is 50g, and then add stearic acid with a mass of 0.5g to the mixed powder; take two 500ml stainless steel ball mill jars, and configure stainless steel with a total mass of 500g respectively Balls (20 steel balls with a diameter of 16mm, and the rest are 9mm), pour two parts of the above-mentioned mixed powder into two ball mill jars respectively, cover the ball mill jars and tighten the bolts.

[0065] Unscrew the vent port of the ball mill tank, put it into the transitional sealed compartment of the vacuum argon glove box, close the compartment door, carry out the operation of vacuuming and introducing argon gas, repeat three times, and then put the gloves in the argon atmosphere protection Open the door of the transition chamber in the box, close and tighten the air port of the ball mill jar, put it back into the transition chamber, take out the ball mill pot, confirm that the air por...

Embodiment 3

[0075]Take 27g of copper element powder and 23g of aluminum element powder, the total mass is 50g, and then add stearic acid with a mass of 0.5g to the mixed powder; take two 500ml stainless steel ball mill jars, and configure stainless steel with a total mass of 500g respectively Balls (20 steel balls with a diameter of 16mm, and the rest are 9mm), pour two parts of the above-mentioned mixed powder into two ball mill jars respectively, cover the ball mill jars and tighten the bolts.

[0076] Unscrew the vent port of the ball mill tank, put it into the transitional sealed compartment of the vacuum argon glove box, close the compartment door, carry out the operation of vacuuming and introducing argon gas, repeat three times, and then put the gloves in the argon atmosphere protection Open the door of the transition chamber in the box, close and tighten the air port of the ball mill jar, put it back into the transition chamber, take out the ball mill pot, confirm that the air port...

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Abstract

The invention provides a preparation method of nano-copper powder. After mixing a certain proportion of copper powder and aluminum powder with a process control agent, they are placed in a ball mill tank, and the powder is mixed at a low speed for a period of time in an argon atmosphere, so that the copper powder and the Aluminum powder is mixed evenly. Then perform high-speed ball milling for a period of time to obtain copper-aluminum mixed powder. Subsequently, the copper-aluminum mixed powder is placed in a tube furnace at 400-600° C. for a period of time to be heat-treated and annealed. Finally, an acid solution or an alkali solution is used for dealloying to obtain nanometer copper powder. The method has low raw materials, simple equipment, and high-efficiency process, and the particle size and structure of the final copper powder product can be regulated by adjusting the ball milling time and heat treatment system, which is beneficial to mass production of nano-copper powder.

Description

technical field [0001] The invention relates to a preparation method of nano copper powder, which belongs to the technical field of nano material preparation and powder metallurgy, and specifically relates to a process for preparing nano copper powder by mechanical ball milling, heat treatment annealing and dealloying after mixing copper powder and aluminum powder . Background technique [0002] In industrial applications, copper powder can be divided into micron copper powder, submicron copper powder and nano copper powder according to its particle size. Nano copper powder refers to copper powder with particle size less than 100nm. At present, the large-scale preparation and industrial production of nano-copper powder belong to the high-tech in the field of nano-material preparation. The preparation methods of nano-copper powder mainly include high-temperature heating evaporation method, electrolysis method and reduction method. For example, the patent with the publicati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04B22F1/00C22F1/08C22F1/04B82Y40/00
CPCC22F1/04C22F1/08B82Y40/00B22F9/04B22F2009/043B22F1/054B22F1/142
Inventor 梁加淼李晨光张德良曾巍王文静谢静文
Owner SHANGHAI JIAOTONG UNIV
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