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Method for preparing nano- copper powder by chemical reduction in water solution

A technology of nano-copper powder and reduction method is applied in the field of copper powder preparation, which can solve the problems of limiting the use effect of copper powder and the like, and achieve the effects of high powder preparation efficiency, low price and easy acquisition.

Inactive Publication Date: 2006-03-29
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the use effect of copper powder is limited

Method used

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  • Method for preparing nano- copper powder by chemical reduction in water solution
  • Method for preparing nano- copper powder by chemical reduction in water solution
  • Method for preparing nano- copper powder by chemical reduction in water solution

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1: Adopt the method of the present invention to prepare nano-copper powder

[0019] The preparation steps are as follows:

[0020] (a) Mix the following materials according to the formula.

[0021] Copper sulfate 20g / L

[0022] Formaldehyde 300g / L

[0023] Silver nitrate 5mg / L

[0024] Gelatin 25g / L

[0025] Potassium Sodium Tartrate 15g / L

[0026] Sodium hydroxide 45g / L

[0027] (b) Heat the homogeneously mixed material to 80°C.

[0028] (c) Apply an ultrasonic field of 800W in the reactor to react to generate nano-copper powder.

[0029] (d) Cool the reacted complete material to room temperature.

[0030] (e) separating the nano-copper powder in the material from the solution.

[0031] (f) drying the nano-copper powder under the protection of an inert gas.

Embodiment 2

[0032] Embodiment 2: Adopt the method of the present invention to prepare nano-copper powder

[0033] The preparation steps are as follows:

[0034] (a) Mix the following materials according to the formula.

[0035] Copper chloride 45g / L

[0036] Sodium hypophosphite 20g / L

[0037] Palladium chloride 10mg / L

[0038] Sodium dodecylbenzenesulfonate 30g / L

[0039] Triethanolamine 25g / L

[0040] Potassium hydroxide 30g / L

[0041] (b) Heat the homogeneously mixed material to 75°C.

[0042] (c) Apply an ultrasonic field of 700W in the reactor to react to generate nano-copper powder.

[0043] (d) Cool the reacted complete material to room temperature.

[0044] (e) separating the nano-copper powder in the material from the solution.

[0045] (f) drying the nano-copper powder under the protection of an inert gas.

Embodiment 3

[0046] Embodiment 3: Adopt the method of the present invention to prepare nano-copper powder

[0047] The preparation steps are as follows:

[0048] (a) Mix the following materials according to the formula.

[0049] Copper sulfate 30g / L

[0050] Potassium borohydride 25g / L

[0051] Silver nitrate 2mg / L

[0052] Gelatin 30g / L

[0053] Triethanolamine 28g / L

[0054] Sodium hydroxide 37g / L

[0055] (b) Heat the homogeneously mixed material to 70°C.

[0056] (c) Apply an ultrasonic field of 750W in the reactor to react to generate nano-copper powder.

[0057] (d) Cool the reacted complete material to room temperature.

[0058] (e) separating the nano-copper powder in the material from the solution.

[0059] (f) drying the nano-copper powder under the protection of an inert gas.

[0060] Adopt above-mentioned embodiment, equipment investment is little, process is simple, preparation cost is low, and process sees figure 1 . The nano-copper powder obtained by this method ...

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Abstract

The present invention is chemical reduction process of preparing nanometer copper powder in water solution, and relates to electrochemical process for preparing powdered material. The preparation process adopts the proper combination of main salt, reductant and additives, the main salt is copper sulfate or copper chloride, the reductant is sodium hypophosphorate, sodium borohydride and formaldehyde, and the additives include silver nitrate or palladium chloride, gelatin or SDBS, potassium sodium tartrate or triethanolamine and sodium hydroxide or potassium hydroxide. During the preparation, outer ultrasonic field is applied. The preparation process is simple and high in preparation speed, and has no coagulation of copper powder to ensure the medium powder size smaller than 100 nm for ideal use effect of the nanometer copper powder.

Description

technical field [0001] The invention relates to the preparation of powder materials by an electrochemical method, in particular to the preparation of copper powder. Background technique [0002] Due to the wide application of copper powder, the research on its preparation method has received great attention both at home and abroad. The chemical method is to generate the basic particles of the substance through the chemical reaction of the substance—molecules, atoms and ions, etc., and become ultrafine powder through nucleation, growth and condensation. It is an effective way to prepare copper powder. [0003] According to the method for preparing copper powder introduced in "Journal of Materials Science and Engineering" 2003, Vol.21, Nol, p57-59, using KBH 4 As a reducing agent, copper powder with a particle size of 50-500nm has been prepared, but the size of the copper powder is very uneven, and the median particle size cannot be guaranteed to be below 100nm. Therefore, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 孙冬柏俞宏英孟惠民李辉勤樊自拴
Owner UNIV OF SCI & TECH BEIJING
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