A kind of superfine copper powder and preparation method thereof

An ultra-fine copper powder and powder technology, applied in the field of powder materials, can solve the problems of poor dispersibility and easy agglomeration of products, and achieve the effects of good dispersibility, easy control of copper powder particle size and simple process.

Active Publication Date: 2016-04-20
JIANGXI INST OF RARE EARTHS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hydrogen gas phase high-temperature reduction in the preparation process makes the product easy to agglomerate and poor in dispersibility

Method used

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  • A kind of superfine copper powder and preparation method thereof
  • A kind of superfine copper powder and preparation method thereof
  • A kind of superfine copper powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Put 5g analytically pure copper oxide powder, 20g grinding balls and 10g water into a stainless steel ball mill tank, and grind it on a planetary ball mill at a speed of 600r / min for 6h; then, add 2.5g concentration in the above stainless steel tank It is 80% hydrazine hydrate and continues to grind for 4 hours at a speed of 400r / min; finally, after filtering and drying the resulting product, ultrafine copper powder particles can be obtained.

[0055] The surface morphology of the superfine copper powder material prepared above was observed with the JSM7100F model field emission scanning electron microscope produced by JEOM in Japan.

[0056] The ultrafine copper powder material prepared above was analyzed by Dandong Baxter BT-9300Z laser particle size distribution analyzer.

[0057] The ultrafine copper powder material prepared above was subjected to XRD testing on the X'PertPROMPD multifunctional X-ray diffractometer produced by PANalytical, the Netherlands.

[0058] figure 1...

Embodiment 2

[0062] Put 5g of analytically pure cuprous oxide powder, 20g of grinding balls and 10g of water into a stainless steel ball mill, and grind on a planetary ball mill at 600r / min for 10h; then, place the above suspension in a beaker , Add 2.5g of hydrazine hydrate with a concentration of 80%, and carry out ultrasonic dispersion for 4h in an ultrasonic cleaning machine; finally, after filtering and drying the obtained product, ultrafine copper powder particles can be obtained.

[0063] Figure 4 It is an SEM image of the ultrafine copper powder obtained in Example 2. It can be seen from the figure that the particles of the copper powder are amorphous, the particle size is concentrated in 0.1-1.5 μm, and it has good dispersibility.

[0064] Figure 5 This is the particle size analysis diagram of the ultrafine copper powder obtained in Example 2. It can be seen from the diagram that the particle size of the ultrafine copper powder is all less than 2 μm, and most of the particle size is c...

Embodiment 3

[0067] Put 5g of nano-copper oxide powder in a beaker, add 20g of ethanol, add 2.5g of hydrazine hydrate with a concentration of 80%, and perform ultrasonic dispersion in an ultrasonic cleaner for 4h; finally, the resulting product is filtered and dried to obtain super Fine copper powder particles.

[0068] Figure 7 This is the SEM image of the ultrafine copper powder obtained in Example 3. It can be seen from the figure that the particles of the copper powder are amorphous, the particle size is concentrated in 0.1-1 μm, and it has good dispersibility.

[0069] Picture 8 This is the particle size analysis diagram of the ultrafine copper powder obtained in Example 3. It can be seen from the diagram that the particle size of the ultrafine copper powder is all less than 2 μm, and most of the particle sizes are concentrated at 0.7 μm.

[0070] Picture 9 The XRD pattern of the ultrafine copper powder obtained in Example 3, where 2θ=43.3°, 2θ=50.4° and 2θ=74.0° are characteristic peaks...

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Abstract

The invention belongs to the technical field of powder material and particularly relates to superfine copper powder prepared through a liquid-phase ball mill reduction method and a preparation method of the superfine copper powder. The preparation method comprises the following steps: reductant is added in slurry of copper oxide powder, and grinding dispersion or ultrasonic dispersion is performed while liquid-phase reduction reaction is performed to obtain superfine copper powder; and the obtained product is filtered and dried to obtain superfine copper powder with the particle size of about 0.1 to 2 um. The preparation method provided by the invention has the advantages that raw materials are cheap, the technical process is simple, the reaction is moderate, the operation is simple and convenient, and large-scale production can be realized easily; and meanwhile, the prepared copper powder is very small in particle size and is easy to control and good in dispersity.

Description

Technical field [0001] The invention relates to the technical field of powder materials, in particular, the invention relates to a method for preparing ultrafine copper powder by a liquid-phase ball mill reduction method. Background technique [0002] Due to its small particle size and large specific surface area, ultrafine copper powder has basic characteristics such as small size effect and surface interface effect; therefore, it has high surface activity, good electrical and thermal conductivity, and is an important industrial raw material. It has a wide range of applications in powder metallurgy, catalysts, lubricants, conductive coatings and electromagnetic shielding materials. [0003] There are many production methods of copper powder, such as atomization method, electrolysis method, physical evaporation-condensation method, mechanical crushing method, reduction method and so on. The atomization method is divided into gas atomization and water atomization. The atomization m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/20
Inventor 苏发兵王光娜朱永霞翟世辉
Owner JIANGXI INST OF RARE EARTHS CHINESE ACAD OF SCI
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