Method for preparing nano-metallic copper powder

A technology of nano-metal and copper powder, which is applied in the field of preparation of nano-metal copper powder, to achieve the effect of simple and easy operation, short reaction time and low price in the preparation process

Inactive Publication Date: 2012-07-18
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, the sol-gel method is mainly used to prepare nano-metal oxides, and there is no report on the preparation of nano-copper powder by sol-gel method in China.

Method used

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  • Method for preparing nano-metallic copper powder
  • Method for preparing nano-metallic copper powder

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preparation example Construction

[0030] The present invention is described further below by example, but does not limit the present invention. The operation steps of this preparation method are:

[0031] First add the copper salt into the stirring container, then add the reaction solvent and chelating agent into the stirring container, heat the stirring container so that the temperature of the stirring container reaches 70~90 °C, the speed is 1200 r / min, and under this condition Stir continuously until the sol is formed, then dry to gel in a drying oven at 80-100 °C, then grind the gel into powder, heat up to a certain temperature in a tube furnace for a certain period of time, and cool down to Take it out at room temperature to obtain nanometer copper powder.

[0032] Among them, the raw material required for the preparation is one or more mixtures of copper sulfate, basic copper carbonate, copper nitrate, copper chloride, copper carbonate, copper acetate; the solvent is deionized water; the chelating agent...

Embodiment 1

[0034] Put 5 g of copper nitrate in a beaker with a volume of 100 mL, add 20 mL of deionized water, then weigh 4 g of citric acid, dissolve it in 20 mL of deionized water, and then slowly add it to the copper nitrate solution. Place in a water bath stirrer, add ammonia water dropwise to adjust the pH to 4, then keep the temperature at 80 °C, and stir at a stirring speed of 1200 r / min until the wet gel is formed, and the wet gel is dried in a drying oven at 80 °C to dry gel. Grind the xerogel into a powder and weigh 8.5 g. The powdered xerogel was placed in a crucible and placed in a tube furnace, controlled by a program, and calcined at 300 °C for 1 h under argon protection, then cooled to room temperature, and taken out to obtain dark red copper powder, weighing 1.3 g.

Embodiment 2

[0036] Weigh 5 g of basic copper carbonate and place it in a beaker with a volume of 100 mL, add 40 mL of deionized water to dissolve, then weigh 2 g of lignin and dissolve it in 40 mL of deionized water, and slowly add the lignin solution to the alkali Formula copper carbonate solution, then add ammonia water dropwise to adjust the pH to 7, place the beaker in a water-bath stirring pot, stir at 80 °C until wet gel, then move to a drying oven at 90 °C to dry to gel. Grind the xerogel into powder and place it in a crucible, put it into a tube furnace, program temperature control, argon protection, calcinate at 200 °C for 1 h, cool down to room temperature, and take it out to obtain dark red copper powder, weighing 2.7 g.

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Abstract

A method for preparing nano-metallic copper powder relates to methods for preparing chemical materials and comprises the preparation processes: adding copper salt serving as raw materials into a reactor, adding solvents and chelating agents into the reactor, adjusting pH (potential of hydrogen) value with ammonia water, stirring liquor, controlling reaction temperature and reaction time to transform the liquor into sol, and controlling drying temperature and drying time to transform the sol into gel; and calcining the gel under the protection of inert atmosphere at the temperature of 200-400 DEG C for 0.5-2h, and cooling the gel to reach room temperature after calcining to obtain the nano-copper powder. The nano-copper powder is prepared by a sol-gel method, the reaction time is short, and the reaction temperature is low. Operation is simple and practical in the preparation processes, the preparation method is highly applicable to the raw materials, the raw materials and reagents are low in cost and easy to obtain, products in the preparation procedures are easy to obtain, and the obtained nano-copper powder is pure.

Description

technical field [0001] The invention relates to a method for preparing chemical materials, in particular to a method for preparing nanometer metal copper powder. Background technique [0002] Nano-copper powder has many characteristics such as large specific surface area, small size, large number of surface active centers, low resistance, quantum size effect and macroscopic quantum tunneling effect, and has a very wide range of applications. Nano-copper powder is not only an excellent lubricant and catalyst, but also can be widely used as a conductive filler in electromagnetic shielding materials and conductive coatings. Therefore, the development of nano-copper powder has important theoretical significance and practical value. [0003] The preparation methods of nano-copper powder mainly include chemical reduction method, electrolysis method, machine grinding method, gas phase steam method, plasma method and so on. At present, the literature reports on the preparation of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/16
Inventor 于三三张丽李双明李文秀
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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