Method for preparing nanometer copper powder by chemical reduction in water solution

A technology of nano copper powder and reduction method, which is applied in the field of copper powder preparation, can solve problems such as limiting the use effect of copper powder, and achieve the effects of high powder preparation efficiency, low preparation cost and low price.
CN1605419AInactive Publication Date: 2005-04-13UNIV OF SCI & TECH BEIJING
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF SCI & TECH BEIJING
Publication Date
2005-04-13
Estimated Expiration
Not applicable · inactive patent

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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.
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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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