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
CN107790733BActive Publication Date: 2020-02-07SHANGHAI JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI JIAOTONG UNIV
Publication Date
2020-02-07

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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 400-600Β° 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.
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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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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