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Metallic particle and method of producing the same

A technology of metal particles and electrolytic solutions, applied in the direction of electrolytic components, electrolytic processes, nanotechnology for materials and surface science, etc., can solve problems such as high production costs, troublesome steps, and troublesome search, and achieve electrical and thermal conductivity Effect of improving and preventing pollution

Inactive Publication Date: 2006-02-01
SHINANO KENSHI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned conventional method has the following disadvantages: the steps of melting metal powder, drying the mixture, and sintering the mixture are cumbersome; time-consuming; production costs must be high; and it is difficult to uniformly mix a large amount of fine carbon fibers to produce composite materials on a large scale
That said, finding the right dispersant for each electrolytic solution is cumbersome

Method used

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  • Metallic particle and method of producing the same
  • Metallic particle and method of producing the same
  • Metallic particle and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] electrolytic solution

[0058] CuS0 4 ·5H 2 O: 160 g / l

[0059] h 2 SO 4 : 100g / L

[0060] Carbon nanotubes: 1 g / L

[0061] Ultrasonic intensity: medium (20kHz, 4kW / L)

[0062] The electrolytic solution was electrolyzed for 15 minutes under the conditions of a solution temperature of 25° C. and a current density of 40 A / dm 2 . The electrolytic solution is stirred, and a moderate-intensity ultrasonic wave is applied to the electrolytic solution by a vibration generator. The scanning electron micrographs of the deposited film on the cathode surface are shown in figure 2 .

[0063] Such as figure 2 As shown, a Cu-carbon nanotube composite material in which many carbon nanotubes were combined with fine spherical copper particles with a diameter of about 10 microns or less was produced.

[0064] The composite material described above is mechanically detached stably from the cathode and forms granules.

Embodiment 2

[0066] electrolytic solution

[0067] CuSO 4 ·5H 2 O: 40 g / L

[0068] h 2 SO 4 : 100g / L

[0069] Carbon nanotubes: 1 g / L

[0070] Ultrasonic intensity: slightly lower (38kHz, 400W / L)

[0071] The electrolytic solution was electrolyzed for 15 minutes under the conditions of a solution temperature of 25° C. and a current density of 40 A / dm 2 . The electrolytic solution is stirred, and a slightly lower ultrasonic wave is applied to the electrolytic solution by a vibration generator. The scanning electron micrographs of the deposited film on the cathode surface are shown in image 3 .

[0072] Such as image 3 As shown, a Cu-carbon nanotube composite material in which many carbon nanotubes are combined with fine spherical copper particles with a diameter of about 10 micrometers was prepared.

[0073] The composite material described above is mechanically detached stably from the cathode and forms granules.

Embodiment 3

[0075] electrolytic solution

[0076] CuSO 4 ·5H 2 O: 40 g / L

[0077] h 2 SO 4 : 100g / L

[0078] Carbon nanotubes: 1 g / L

[0079] Ultrasonic intensity: medium (20kHz, 4kW / L)

[0080] The electrolytic solution was electrolyzed for 15 minutes under the conditions of a solution temperature of 25° C. and a current density of 40 A / dm 2 . The electrolytic solution is stirred, and a moderate-intensity ultrasonic wave is applied to the electrolytic solution by a vibration generator. The scanning electron micrographs of the deposited film on the cathode surface are shown in Figure 4 and 5 . Notice Figure 5 for Figure 4 enlarged photo of .

[0081] Such as Figure 4 As shown, spherical Cu-carbon nanotube composites with uniform diameter were prepared. Additionally, if Figure 5 As shown, many carbon nanotubes are bound together with fine spherical copper particles about 10-30 microns in diameter

[0082] The above-mentioned composite material is stably mechanically s...

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Abstract

The method of producing metallic particles is capable of dispersing fine carbon fibers in an electrolytic solution without using a dispersing agent. The method of producing metallic particles comprises the steps of: electrolyzing an electrolytic solution (X), in which fine carbon fibers have been dispersed, so as to deposit metallic particles including the fine carbon fibers on a cathode (22); and separating the deposited metallic particles from the cathode (22). Vibrations or shocks are applied to the electrolytic solution (X).

Description

technical field [0001] The invention relates to metal particles suitable for powder metallurgy materials, electrical contact points, electromagnetic interference shielding materials, conductive materials, batteries, contact points of friction films, sliding films, etc., and a manufacturing method thereof. Background technique [0002] Composite materials in which fine carbon fibers such as carbon nanotubes and carbon nanofibers are dispersed are known. [0003] The bulk composite material disclosed in Japanese Patent Laid-Open No. 2000-223004 is formed by mixing fine carbon fibers with metal powder and sintering the mixture. [0004] Fine carbon fibers are very small or 5-300 nanometers in diameter. Ordinary metal particles, on the other hand, have a diameter of one hundred to several hundred microns. That is, the diameter of the metal particles is 10 or more times larger than that of the fine carbon fibers. There is no way to mix them evenly just by mixing. [0005] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/02
CPCC22C49/14B22F2998/00C25C5/02B82Y30/00C25D7/00C25C7/002B22F3/10
Inventor 市来浩一古川显秀
Owner SHINANO KENSHI