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Large-batch preparation method of high-dispersion carbon nano tube-aluminum powder

A technology of carbon nanotubes and high dispersion, which is applied in the field of preparation of carbon nanotubes-aluminum powder, which can solve the problems of large van der Waals force, difficulty in uniformly dispersing and mixing carbon tubes, and large diameter ratio to achieve efficient mixing.

Inactive Publication Date: 2014-02-26
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large diameter ratio of carbon nanotubes and the strong van der Waals force between carbon nanotubes, it is very difficult to disperse carbon nanotubes and mix them uniformly with the matrix.

Method used

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  • Large-batch preparation method of high-dispersion carbon nano tube-aluminum powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1) First, add multi-walled carbon nanotubes with a diameter of 40-60nm and a length of 20-30μm and 5083 aluminum alloy powder with a particle size of 25μm into a horizontal ball milling device, and ball mill under vacuum conditions and a speed of 1200rpm. The ball milling time is 3h, the ball-to-material ratio is 10:1, and the precursor of carbon nanotube-aluminum powder is obtained, and the weight percentage of carbon nanotube in the precursor of carbon nanotube-aluminum powder is 50%;

[0015] 2) Then mix the prepared carbon nanotube-aluminum powder precursor with 5083 aluminum alloy powder at a weight ratio of 1:10, add it to a large mixer and stir evenly, under vacuum conditions and a speed of 2000rpm Stir evenly, the stirring time is 5 hours, and the ball-to-material ratio is 50:1, and the highly dispersed carbon nanotube-aluminum powder can be obtained.

Embodiment 2

[0017] 1) First, add multi-walled carbon nanotubes with a diameter of 40-50nm and a length of 40-45μm and 5083 aluminum alloy powder with a particle size of 30μm into a horizontal ball milling device, and ball mill under the protection of an inert atmosphere and a speed of 1600rpm , the ball milling time is 6h, the ball-to-material ratio is 30:1, the precursor of carbon nanotube-aluminum powder is obtained, and the weight percentage of carbon nanotube in the precursor of carbon nanotube-aluminum powder is 35%;

[0018] 2) Then mix the prepared carbon nanotube-aluminum powder precursor with 5083 aluminum alloy powder at a weight ratio of 1:20, add it to a large mixer and stir evenly, in an inert atmosphere protection and a speed of 4000rpm Stir evenly, the stirring time is 5 hours, the ball-to-material ratio is 40:1, and the highly dispersed carbon nanotube-aluminum powder can be obtained.

Embodiment 3

[0020] 1) First, add single-walled carbon nanotubes with a diameter of 1-2 nm and a length of 10-15 μm and 5083 aluminum alloy powder with a particle size of 10 μm into a horizontal ball milling device, and ball mill under the protection of an inert atmosphere at a speed of 1500 rpm. The ball milling time is 4h, the ball-to-material ratio is 20:1, and the precursor of carbon nanotube-aluminum powder is obtained, and the weight percentage of carbon nanotube in the precursor of carbon nanotube-aluminum powder is 30%;

[0021] 2) Then mix the prepared carbon nanotube-aluminum powder precursor with 5083 aluminum alloy powder at a weight ratio of 1:20, add it to a large mixer and stir evenly, in an inert atmosphere protection and a speed of 3000rpm Stir evenly, the stirring time is 6 hours, the ball-to-material ratio is 45:1, and the highly dispersed carbon nanotube-aluminum powder can be obtained.

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Abstract

The invention discloses a large-batch preparation method of a high-dispersion carbon nano tube-aluminum powder. The large-batch preparation method comprises the following steps: firstly, ball milling carbon nano tubes and pure aluminum or aluminum alloy powder at the revolution speed of 1300-1800rpm for 3-6 hours with a ball-to-powder ratio of (8-30):1, thereby obtaining a precursor of the carbon nano tube-aluminum powder, wherein the carbon nano tubes account for 20-60% weight of the precursor; mixing the precursor with pure aluminum or aluminum alloy powder; and evenly stirring at the revolution speed of 100-5000rpm for 1-20 hours with a ball-to-powder ratio of (10-100):1. According to the method, the high-content precursor of the carbon nano tube-aluminum powder is prepared by means of dispersing the carbon nano tubes in a short time and evenly mixing the carbon nano tubes with matrix powder, and the carbon nano tubes and aluminum matrixes are mixed efficiently, so that the carbon nano tube-aluminum powder is prepared in large bathes.

Description

technical field [0001] The invention relates to the preparation of carbon nanotube-aluminum powder, in particular to a batch preparation method of highly dispersed carbon nanotube-aluminum powder. Background technique [0002] Carbon nanotubes (Carbon nanotubes, CNTs) are seamless nanoscale tubular materials rolled up from a single-layer or multi-layer carbon hexagonal planar network. It has a layered structure similar to graphite, and it has many excellent intrinsic properties. , such as a series of comprehensive properties such as heat resistance, corrosion resistance, thermal shock resistance, good conduction and electrical conductivity. Theoretical calculations show that the C-C covalent bond that makes up carbon nanotubes is the most stable chemical bond in nature, which makes carbon nanotubes have extremely high strength and great toughness. Due to the special structure of carbon nanotubes, carbon nanotubes are considered to be the most ideal nano-reinforcement phase,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/04
Inventor 蔡炜王利民孙庆森汤超何卫陈思敏
Owner STATE GRID CORP OF CHINA