Submicron copper powder and method for preparing same by sulfuric acid-process chemical reduction

A technology of submicron copper powder and sulfate, which is applied in the field of submicron copper powder and the preparation of the copper powder by sulfuric acid chemical reduction, can solve the problems of high cost, difficult treatment, easy introduction of impurities, etc. The effect of improving yield rate and high application value

Active Publication Date: 2010-11-10
CHONGQING TAILU TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As far as the physical method is concerned, the gas-phase steam method has complex equipment and high cost; the γ-ray method product is difficult to collect; the plasma method has low energy utilization rate; the product prepared by the water atomization method has a large particle size and poor formability
As far as the chemical method is concerned, the copper powder prepared by the mechanochemical method is uneven, the particle size distribution is wide, and impurities are easily introduced; the electrolysis method consumes a lot of energy and costs high; the ammonium

Method used

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  • Submicron copper powder and method for preparing same by sulfuric acid-process chemical reduction

Examples

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Effect test

Embodiment 1

[0030] Example 1 Preparation of 500 grams of submicron copper powder

[0031] Prepare as follows:

[0032] (1), prepare 20000ml of sulfate solution, dissolve ferrous sulfate with water, so that the total concentration of sulfate radical and ferrous ion contained in it is 500g / l;

[0033] (2), prepare 2000ml of colloidal solution, add water and stir and mix in the water-soluble organic matter and be mixed with the colloidal solution that concentration is 100g / L, described water-soluble organic matter is selected from the combination of glucose, citric acid, water-soluble starch, three total weights are 200 grams, the relationship between mutual proportions is not limited;

[0034] (3), after mixing the two solutions of steps (1) and (2), add industrial sulfuric acid, adjust the pH of the solution to 0.8, and the specific gravity of the solution is 1.32, stir and mix, and heat up to 55 ° C;

[0035] (4), in step (3) solution, add degreasing back iron sheet, produce fresh highl...

Embodiment 2

[0038] Example 2 Preparation of 1000 grams of micron copper powder

[0039] Prepare as follows:

[0040] (1) Prepare 30,000ml of sulfate solution. Dissolve soluble sulfate in water so that the total concentration of sulfate and metal cations, namely aluminum ions, ferrous ions, and manganese ions, is 250g / L. Since aluminum sulfate, ferrous sulfate, manganese sulfate, the ratio of the three is not limited;

[0041] (2), prepare colloidal solution 2000ml, add water and stir and mix in the water-soluble organic matter and be mixed with the colloidal solution that concentration is 100g / L, described water-soluble organic matter is selected from urea, water-soluble starch combination, both gross weights are 200 grams, The mutual proportional relationship is not limited;

[0042](3), after mixing the two solutions of steps (1) and (2), add industrial sulfuric acid to adjust the pH of the solution to 0.1, and the specific gravity of the solution is 1.28; then stir and mix and heat u...

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PUM

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Abstract

The invention provides a method for preparing submicron copper powder by sulfuric acid-process chemical reduction. The method comprises the following steps of: adding sulfuric acid into the mixed solution of solution of soluble sulfate and solution of colloid; adding iron sheets into the mixed solution for performing a reaction to generate high-reducibility hydrogen; adding anhydrous cupric sulfate or blue vitriol twice into the mixed solution; controlling temperature and stirring speed under the action of the high-reducibility hydrogen; and reducing copper ions into copper atoms. In the method, high-activity and low-cost hydrogen is taken as a reducing agent, so that cost is lowered and yield is increased; particle control technology is adopted, so that the obtained copper powder has fine particles, high purity and high oxidation resistance; and micro copper powder is suitable for industrial mass production and wider product use.

Description

technical field [0001] The invention relates to an ultrafine metal powder and a preparation method thereof, in particular to a submicron copper powder and a method for preparing the copper powder by chemical reduction with a sulfuric acid method. Background technique [0002] Ultrafine materials are new functional basic materials developed in the mid-1980s, and ultrafine metal materials are an important branch of them. At present, due to the excellent activity of ultrafine metal powders in the ultrafine state, there is no strict definition for metal ultrafine materials. Powders ranging from a few nanometers to thousands of nanometers can be called It is an ultrafine metal powder material. Due to the small size effect, surface interface effect, quantum scale effect and quantum tunnel effect of ultrafine metal materials, it has many different properties from conventional materials with the same composition, and has great potential in the fields of mechanics, electricity, magn...

Claims

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Application Information

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IPC IPC(8): B22F9/26
Inventor 吉维群
Owner CHONGQING TAILU TECH DEV
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