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Method for preparing flake-shaped MWCNTs/Cu composite powder with small particle size

A technology of composite powder and small particle size, applied in the direction of nanotechnology, can solve the problems of complex process, difficult industrial production, high cost, etc., and achieve the effect of short process flow and no industrial waste

Inactive Publication Date: 2015-02-25
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The small-diameter flaky copper powder obtained by this method needs further processing, and the process of removing grinding aids and dispersants is complicated, the cost is high, and it is not easy for industrial production.

Method used

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  • Method for preparing flake-shaped MWCNTs/Cu composite powder with small particle size
  • Method for preparing flake-shaped MWCNTs/Cu composite powder with small particle size
  • Method for preparing flake-shaped MWCNTs/Cu composite powder with small particle size

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The method for preparing small-diameter flaky MWCNTs / Cu composite powders has the following specific steps:

[0025] Step 1. First, mix 2.0g of MWCNTs and absolute ethanol evenly, then perform ultrasonic dispersion for 0.5h, and then perform suction filtration to control the mass ratio of MWCNTs and absolute ethanol in MWCNTs to 1:2; the purity of MWCNTs is greater than 95wt.%, and the outer diameter is 10nm and the length is 5μm, such as figure 1 Shown; The mass ratio of absolute ethanol addition to MWCNTs is 10:1;

[0026] Step 2. Add grinding balls, 194g of spherical atomized copper powder with a particle size of 80μm, and 6.0g of MWCNTs treated in step 1 (control the mass fraction of MWCNTs in MWCNTs / Cu composite powder to be 3%) into the horizontal high-energy stirring ball mill in turn Among them, the grinding ball material of the horizontal high-energy stirring ball mill is bearing steel, the size is Ф5mm, and then the chamber is sealed and filled with argon 3 t...

Embodiment 2

[0028] The method for preparing small-diameter flaky MWCNTs / Cu composite powders has the following specific steps:

[0029] Step 1. First, mix 4.0g MWCNTs and absolute ethanol evenly, then perform ultrasonic dispersion for 1 hour, and then perform suction filtration to control the mass ratio of MWCNTs and absolute ethanol in MWCNTs to 1:2.25; the purity of MWCNTs is greater than 95wt.%, and the outer diameter is 10nm with a length of 5μm, such as figure 1 Shown; The absolute ethanol addition is 50:1 with the mass ratio of MWCNTs;

[0030] Step 2. Add grinding balls, 120g spherical atomized copper powder with a particle size of 80μm, and MWCNTs treated in step 1 (control the mass fraction of MWCNTs in MWCNTs / Cu composite powder to be 3%) into the horizontal high-energy stirring ball mill in sequence , the material of the grinding balls in the horizontal high-energy stirring ball mill is bearing steel, the size is Ф5mm, and then the chamber is sealed and filled with argon gas a...

Embodiment 3

[0032] The method for preparing small-diameter flaky MWCNTs / Cu composite powders has the following specific steps:

[0033] Step 1. First, mix 5.0g of MWCNTs and absolute ethanol evenly, then perform ultrasonic dispersion for 2 hours, and then perform suction filtration to control the mass ratio of MWCNTs and absolute ethanol in MWCNTs to 1:1; the purity of MWCNTs is greater than 95wt.%, and the outer diameter is 70nm , with a length of 30 μm, such as figure 1 Shown; The absolute ethanol addition is 5:1 with the mass ratio of MWCNTs;

[0034] Step 2. Add grinding balls, 90g of spherical atomized copper powder with a particle size of 120μm, and MWCNTs treated in step 1 (control the mass fraction of MWCNTs in MWCNTs / Cu composite powder to be 5%) into the horizontal high-energy stirring ball mill in turn , the material of the grinding balls in the horizontal high-energy stirring ball mill is bearing steel, the size is Ф3mm, and then the chamber is sealed and filled with argon 4 ...

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Abstract

The invention relates to a method for preparing flake-shaped MWCNTs / Cu composite powder with a small particle size and belongs to the technical field of new material and composite power preparation. First, after MWCNTs and absolute ethyl alcohol are uniformly mixed, ultrasonic dispersion and suction filtration are carried out; grinding balls, spherical atomization copper powder with the particle size ranging from 80 micrometers to 120 micrometer and the processed MWCNTs are sequentially added into a horizontal high-energy stirring ball grinding mill, the whole ball milling process is completed in alternating conversion of the rotating speed, and the flake-shaped MWCNTs / Cu composite powder prepared is dispersed under 200rpm finally. The pure flake-shaped MWCNTs / Cu composite powder with the small particle size is prepared rapidly through the method, the median diameter D50 of the flake-shaped MWCNTs / Cu composite powder with the small particle size ranges from 20 micrometers to 30 micrometers, the production efficiency is high, the cost is low, and the method is suitable for industrial production.

Description

technical field [0001] The invention relates to a method for preparing small-diameter sheet-like MWCNTs / Cu composite powder, and belongs to the technical field of new materials and composite powder preparation. Background technique [0002] Carbon nanotubes have excellent mechanical, electrical, and thermal properties, and have broad application prospects in quantum wires, electronic devices, hydrogen storage and energy storage materials, composite materials, and catalyst carriers. [0003] The MWCNTs in the flake MWCNTs / Cu composite powder with small particle size are evenly dispersed in the copper matrix, which can be used to prepare functional materials with high strength, high electrical conductivity and high thermal conductivity, and can be widely used in electrical contacts, high-speed train contact wires and electronic devices. [0004] Flake copper powder has been widely used as a raw material for conductive paste due to its good conductivity, and by refining the fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B82Y40/00
Inventor 蔡晓兰张文忠王子阳
Owner KUNMING UNIV OF SCI & TECH
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