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Method for modifying single crystal copper with graphene

A graphene-modified, single-crystal copper technology, applied in the field of single-crystal copper, to achieve the effects of excellent strength, electrical and thermal conductivity, and good electrical conductivity

Active Publication Date: 2016-11-09
SHENZHEN GRAPHENE LAND LEGEND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a method for graphene modified single crystal copper, which solves how to utilize the excellent performance of graphene to modify single crystal copper to make it Conductivity and signal transmission properties are further improved issues

Method used

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  • Method for modifying single crystal copper with graphene

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Embodiment 1

[0025] Embodiment 1: the method for the graphene modified single crystal copper of the present embodiment, comprises the following steps:

[0026] Under a protective atmosphere, put blister copper in a crucible and heat it to 1200°C to melt to obtain copper liquid;

[0027] The copper liquid is introduced into the casting mold, heated to 1070°C, adding graphene powder accounting for 0.1wt% of the mass of the copper liquid, stirring evenly, cooling the copper liquid at the outlet of the casting mold, and the cooling distance is 12cm, so that the copper The liquid is solidified in one direction along the exit direction of the mold, and is continuously pulled and casted at a speed of 26mm / min to obtain copper ingots, which are heat-treated and cold-drawn to obtain graphene-modified single-crystal copper wires.

Embodiment 2

[0028] Embodiment 2: the method for the graphene modified single crystal copper of the present embodiment, comprises the following steps:

[0029] Under the protection of argon, place the blister copper in a crucible and heat it to 1250°C to melt to obtain copper liquid;

[0030] The copper liquid is introduced into the mold, heated to 1100°C, adding graphene powder accounting for 0.5wt% of the mass of the copper liquid, and stirred evenly, and the copper liquid is cooled at the outlet of the mold according to the cooling water volume of 800mL / min. The cooling distance 18cm, make described copper liquid realize unidirectional solidification along mold outlet direction, and continuous traction continuous casting, the static pressure head of copper liquid is 16mm, and continuous casting speed is 25mm / min, obtains copper ingot, and copper ingot passes through After heat treatment and cold drawing, a graphene-modified single crystal copper wire is prepared.

Embodiment 3

[0031] Embodiment 3: the method for the graphene modified single crystal copper of the present embodiment, comprises the following steps:

[0032] Under the protection of nitrogen, place the blister copper in a graphite crucible and heat it to 1300°C to melt to obtain copper liquid;

[0033] The copper liquid is introduced into the casting mold, heated to 1100°C, adding graphene powder accounting for 0.6wt% of the mass of the copper liquid, stirring evenly, and cooling the copper liquid at the outlet of the casting mold according to the cooling water volume of 100mL / min. The cooling distance It is 16cm, makes described copper liquid realize unidirectional solidification along the mold exit direction, and continuous traction continuous casting, the static pressure head of copper liquid is 15mm, and continuous casting speed is 24mm / min, obtains copper ingot, and copper ingot passes through After heat treatment and cold drawing, a graphene-modified single crystal copper wire is p...

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Abstract

The invention provides a method for modifying single crystal copper with graphene. The method for modifying single crystal copper with graphene comprises the following steps: (1) under protective atmosphere, putting raw copper into a crucible to heat and melt, thereby obtaining molten copper; (2) introducing the molten copper into a casting mould, heating, adding graphene powder, and stirring; (3) cooling the molten copper at an outlet of the casting mould, enabling the molten copper to realize unidirectional solidification in the outlet direction of the casting mould, and continuously pulling and casting, thereby obtaining copper ingot; and (4) performing thermal treatment and cold drawing on the copper ingot to prepare a single crystal copper wire. Graphene-modified single crystal copper prepared by the method has good electrical conductivity, and stable and reliable signal transmission, and electrical resistivity of the graphene-modified single crystal copper is reduced by 25% or more in comparison with that of the single crystal copper.

Description

technical field [0001] The invention relates to the field of single crystal copper, in particular to a method for modifying single crystal copper with graphene. Background technique [0002] Single crystal copper is a kind of high-purity oxygen-free copper. The whole copper rod is composed of only one grain, and there is no "grain boundary" between the grains ("grain boundary" will reflect and refract the passing signal. , causing signal distortion and attenuation), thus having extremely high signal transmission performance. [0003] Graphene is a two-dimensional crystal composed of carbon atoms with only one atomic thickness. Graphene is not only the thinnest material, but also the strongest material, with a fracture strength 200 times higher than the best steel. At the same time, it has good elasticity, and the stretching range can reach 20% of its own size. It is a new type of nanomaterial with the thinnest, highest strength, and strongest electrical and thermal conduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/00B22D11/11C30B11/00C30B11/06C30B29/52
CPCB22D11/004B22D11/005B22D11/11C30B11/001C30B11/06C30B29/52
Inventor 孙学栋姚永健
Owner SHENZHEN GRAPHENE LAND LEGEND TECH CO LTD
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