Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of three-step reduction method preparation process of nanometer copper powder

A nano-copper powder and preparation process technology, which is applied in the field of three-step reduction preparation process of nano-copper powder, can solve the problems of low purity, many impurities, and wide particle size distribution of copper powder, and achieve small distribution range and particle size fine effect

Inactive Publication Date: 2016-01-20
洛阳森达乳化剂有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ball milling method is to choose a suitable ball mill and ball milling material, and use the rotation or vibration of the ball mill to make the hard ball strongly impact, crush and grind the material, and break the copper block into ultra-fine particles. The advantages of the ball milling method are simple, The output is high, but the disadvantage is that the obtained copper powder has a wide particle size distribution, many impurities, and low purity.

Method used

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
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A three-step reduction preparation process of nanometer copper powder, comprising the following steps:

[0026] (1) Prepare 100ml of copper sulfate solution with a concentration of 0.5mol / L, 7mol / L potassium hydroxide solution, 15ml of 0.2mol / L ascorbic acid, 20ml of 0.15mol / L formaldehyde solution and 1.0mol / L hydroboration Potassium solution 200ml, and the prepared solutions were placed in a constant temperature water bath, so that the temperature of the solution was kept at 70 ° C, and set aside;

[0027] (2) One-step reduction: In a constant temperature water bath, add ascorbic acid solution dropwise to the copper sulfate solution while stirring, and continue stirring for 3 minutes after the dropwise addition;

[0028] (3) Two-step reduction: In the constant temperature water bath, continue to add formaldehyde solution, and continue to stir for 5 minutes after the addition;

[0029] (4) Three-step reduction: In a constant temperature water bath, continue to add pot...

Embodiment 2

[0032] A three-step reduction preparation process of nanometer copper powder, comprising the following steps:

[0033] (1) Prepare 150ml of copper sulfate solution with a concentration of 0.1mol / L, 5mol / L potassium hydroxide solution, 10ml of 0.5mol / L ascorbic acid, 30ml of 0.4mol / L formaldehyde solution and 0.5mol / L hydroboration Potassium solution 300ml, and the prepared solutions were placed in a constant temperature water bath, so that the temperature of the solution was kept at 60 ° C, and set aside;

[0034] (2) One-step reduction: In a constant temperature water bath, add ascorbic acid solution dropwise to the copper sulfate solution while stirring, and continue stirring for 3 minutes after the dropwise addition;

[0035] (3) Two-step reduction: In the constant temperature water bath, continue to add formaldehyde solution, and continue to stir for 5 minutes after the addition;

[0036] (4) Three-step reduction: In a constant temperature water bath, continue to add pota...

Embodiment 3

[0039] A three-step reduction preparation process of nanometer copper powder, comprising the following steps:

[0040] (1) Prepare 60ml of copper sulfate solution with concentration of 0.9mol / L, potassium hydroxide solution of 10mol / L, 30ml of ascorbic acid of 0.4mol / L, 50ml of formaldehyde solution of 0.3mol / L and hydroboration of 1.5mol / L Potassium solution 150ml, and the prepared solutions are respectively placed in a constant temperature water bath, so that the temperature of the solution is kept at 90 ° C, and set aside;

[0041] (2) One-step reduction: In a constant temperature water bath, add ascorbic acid solution dropwise to the copper sulfate solution while stirring, and continue stirring for 6 minutes after the dropwise addition;

[0042] (3) Two-step reduction: In the constant temperature water bath, continue to add formaldehyde solution, and continue to stir for 8 minutes after the addition;

[0043] (4) Three-step reduction: In a constant temperature water bath,...

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
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a three-step reduction method preparation process of nanometer copper powder, comprising the following steps: (1), preparing copper sulfate solution, potassium hydroxide solution, ascorbic acid, formaldehyde solution and potassium borohydride solution; (2), one-step reduction : Add ascorbic acid solution dropwise to the copper sulfate solution while stirring; (3), two-step reduction: add formaldehyde solution; (4), three-step reduction: add potassium hydroxide solution, adjust the pH value of the solution to 9-13, and then Add potassium borohydride solution dropwise, stir until the precipitate is completely formed, and filter to obtain copper powder; (5) Wash and dry the copper powder to obtain 300-800nm ​​nano-copper powder. In the present invention, three kinds of reducing reagents are sequentially added into the soluble copper sulfate solution according to the different reducibility of each reducing reagent to prepare nano-copper powder, which can make the particle size of the copper powder finer, the distribution range smaller and more uniform .

Description

technical field [0001] The invention relates to the technical field of metal copper powder preparation, in particular to a three-step reduction method preparation process of nano copper powder. Background technique [0002] There are various methods of preparing copper powder, including high-energy ball milling and vapor deposition in physical methods. The ball milling method is to choose a suitable ball mill and ball milling material, and use the rotation or vibration of the ball mill to make the hard ball strongly impact, crush and grind the material, and break the copper block into ultra-fine particles. The advantages of the ball milling method are simple, The output is high, but the disadvantage is that the obtained copper powder has a wide particle size distribution, many impurities, and low purity. Vapor deposition is a method of producing copper powder by rapid cooling of heated and melted metallic copper in inert gases such as argon and helium. The preparation of c...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 王学猛贾晓慧曲洋
Owner 洛阳森达乳化剂有限公司