Nano carbon tube composited contact material

An electrical contact material, carbon nanotube technology, used in contact parts, electrolytic coatings, electrophoretic plating, etc.

Inactive Publication Date: 2006-01-25
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a carbon nanotube composite electrical contact material, which uses carbon nanotubes with excellent mechanical properties and electrical conductivity as the reinforcing phase material to replace CdO and SnO 2 、MoS 2 , WC, SiC, La 2 o 3 , diamond powder and other traditional reinforcing phase materials can not only maintain the good conductivity of the base metal, but also overcome the problem of cadmium pollution. At the same time, it is expected to give some additional advantages to electrical contact materials through the outstanding characteristics of carbon nanotubes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Composite electrical contact material: 0.02% carbon nanotubes, the balance being Ag.

[0015] Appearance: Silver-white metallic luster, smooth and even surface. The field emission scanning electron microscope observes the microscopic surface, and there are carbon nanotubes uniformly dispersed in the matrix, and have a good interface with the Ag matrix.

[0016] Material effect: Metal has excellent ductility and is easy to machine. Through the electrical measurement experiment, the electrical conductivity is good, and the electrical conductivity is 44.8MS / m. Through the thermal measurement experiment, its thermal conductivity is excellent. The wear resistance test was carried out by using a falling sand testing machine. Due to the self-lubricating property of carbon nanotubes, its wear resistance is better than that of pure silver. Use this material to process electrical contacts, and use the quick test switch to conduct experiments, which not only increases the volta...

Embodiment 2

[0018] Composite electrical contact material: 2% carbon nanotubes, the balance being Ag.

[0019] Appearance: Silver-white metallic luster, slightly dark, smooth and even surface. The field emission scanning electron microscope observed the microscopic surface, and there were many carbon nanotubes uniformly dispersed in the matrix, and had a good interface with the Ag matrix.

[0020] Material effect: Metal has good ductility and can be machined. Through the electrical measurement experiment, the electrical conductivity is good, and the electrical conductivity is 38.5MS / m. Through the thermal measurement experiment, its thermal conductivity is excellent. The abrasion resistance test was carried out by using the falling sand testing machine. Due to the self-lubricating property of carbon nanotubes, its abrasion resistance is significantly improved compared with pure silver, and the improvement rate reaches 30%. Use this material to process electrical contacts, and use the qu...

Embodiment 3

[0022] Composite electrical contact material: 5% carbon nanotubes, the balance being Ag.

[0023] Appearance: off-white, slightly metallic luster, smooth and even surface. The field emission scanning electron microscope observed the microscopic surface, and there were a large number of carbon nanotubes uniformly dispersed in the matrix, and had a good interface with the Ag matrix.

[0024] Material effect: the ductility of metal has decreased, and micro-cracks appear during machining, so it is not suitable for cold deformation. Through the electrical measurement experiment, the electrical conductivity is good, and the electrical conductivity is 33.4MS / m. Through the thermal measurement experiment, its thermal conductivity is excellent. The wear resistance test was carried out by using a falling sand testing machine. Due to the self-lubricating property of carbon nanotubes, its wear resistance is significantly improved compared with pure silver, and the improvement rate reach...

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Abstract

This invention relates to an nm carbon tube composite electric contact material. The component and its weight percentage are: nm carbon tube: 0.02-5%, the rest is the parent metal. Said nm carbon tube is a multi-wall one with the diameter of 20-100nm or a single wall nm carbon tube with the limited diameter of 1-3nm and length of 1-2mum. Said parent metal refers to the metal prepared by electric deposition reaction and its alloy. This invention applies the carbon nm tube with advanced mechanical and conductive characters as the enhancement substance to replace the traditional substances of CdO, SnO2, MoSz, WCSiC, La2O3 and diamond dust to keep fine conductivity of the parent metal and overcome the Ge pollution.

Description

technical field [0001] The invention relates to an electrical contact material in the technical field of composite materials, in particular to a carbon nanotube composite electrical contact material. Background technique [0002] Electrical contact materials are used to make contacts for active electrical connections, and are one of the key materials commonly used in the fields of electric power, automatic control, and information transmission. The electrical contact phenomenon is a very complex physical phenomenon, which puts forward many harsh and even contradictory requirements for electrical contact materials, such as high electrical conductivity, low contact resistance, high thermal conductivity, high wear resistance, corrosion resistance, solder resistance, Shock resistance and other properties. Most of the traditional electrical contact materials are metal matrix composite materials synthesized by noble metal (Ag, Au, Pt, etc.) materials and ceramic particles through...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R13/03C25D13/02
Inventor 丁桂甫王裕超吴惠箐
Owner SHANGHAI JIAO TONG UNIV
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