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A kind of preparation method of graphene reinforced copper-tungsten composite material

A technology of composite materials and graphene, applied in contacts, electrical components, electric switches, etc., can solve the problem of limited improvement in the resistance to arc ablation of contact materials, so as to improve the resistance to arc ablation and improve the bonding force , enhance the interface bonding effect

Active Publication Date: 2021-10-08
GLOBAL ENERGY INTERCONNECTION RES INST EURO GMBH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the improvement of the anti-arc ablation performance of the contact material is limited due to the difficulty in combining graphene and copper-tungsten powder in the tungsten-copper contact material obtained by the existing method, thereby providing A kind of preparation method of graphene reinforced copper-tungsten composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides a method for preparing a graphene-reinforced copper-tungsten composite material, comprising the following steps:

[0029] (1) With a molar ratio of 1:1, use a laboratory balance to weigh 8.25g of sodium tungstate dihydrate and 6.25g of copper sulfate pentahydrate, respectively, and place them in 100mL of deionized water, fully dissolve them, and obtain two parts with equal concentrations. 0.25mol / L solution;

[0030] (2) The sodium tungstate solution obtained in step 1 and the copper sulfate solution are transferred to the reaction beaker respectively to obtain a blue liquid mixture;

[0031] (3) At room temperature, select an appropriate size of magnetic bar and place it in the above reaction beaker, place the beaker on a hot plate, and stir at a speed of 600rpm for 10 minutes;

[0032] (4) above-mentioned mixed solution is packed in the supporting centrifuge bottle of centrifuge;

[0033] (5) Place the centrifuge bottle in the centrifuge, se...

Embodiment 2

[0046] This embodiment provides a method for preparing a graphene-reinforced copper-tungsten composite material, comprising the following steps:

[0047] (1) With a molar ratio of 1:1, use a laboratory balance to weigh 8.25g of sodium tungstate dihydrate and 6.25g of copper sulfate pentahydrate, respectively, and place them in 100mL of deionized water, fully dissolve them, and obtain two parts with equal concentrations. 0.25mol / L solution;

[0048] (2) The sodium tungstate solution obtained in step 1 and the copper sulfate solution are transferred to the reaction beaker respectively to obtain a blue liquid mixture;

[0049] (3) At room temperature, select an appropriate size of magnetic rod and place it in the above reaction beaker, place the beaker on a hot plate, and stir at a speed of 600 rpm for 15 minutes;

[0050] (4) above-mentioned mixed solution is packed in the supporting centrifuge bottle of centrifuge;

[0051] (5) Place the centrifuge bottle in the centrifuge, s...

Embodiment 3

[0064] This embodiment provides a method for preparing a graphene-reinforced copper-tungsten composite material, comprising the following steps:

[0065] (1) With a molar ratio of 1:1, use a laboratory balance to weigh 8.25g of sodium tungstate dihydrate and 6.25g of copper sulfate pentahydrate, respectively, and place them in 100mL of deionized water, fully dissolve them, and obtain two parts with equal concentrations. 0.25mol / L solution;

[0066] (2) The sodium tungstate solution obtained in step 1 and the copper sulfate solution are transferred to the reaction beaker respectively to obtain a blue liquid mixture;

[0067] (3) At room temperature, select an appropriate size of magnetic rod and place it in the above reaction beaker, place the beaker on a hot plate, and stir at a speed of 600 rpm for 12 minutes;

[0068] (4) above-mentioned mixed solution is packed in the supporting centrifuge bottle of centrifuge;

[0069] (5) Place the centrifuge bottle in the centrifuge, s...

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Abstract

The invention relates to the technical field of new material preparation, and discloses a method for preparing a graphene-reinforced copper-tungsten composite material. In the method, graphene oxide is added to an aqueous solution of copper tungstate, dehydrated and hot-pressed to obtain the graphene-reinforced copper Tungsten composite material, the copper tungstate is easy to form a uniform mixture with nano-scale graphene, which enhances the interfacial bonding force between copper tungstate and graphene; at the same time, because the oxygen-containing functional groups on the surface of graphene oxide provide copper tungstate The active binding site further improves the binding force between graphene oxide and copper tungstate, and promotes better dispersion of graphene oxide on the copper tungstate substrate without agglomeration, binding without falling off, even after dehydration and reduction , this dispersion and combination can still be retained, thereby obtaining a graphene-reinforced copper-tungsten composite material precursor with high stability, thereby effectively improving the arc ablation resistance of the copper-tungsten composite material.

Description

technical field [0001] The invention relates to the technical field of preparation of new materials, in particular to a method for preparing a graphene-reinforced copper-tungsten composite material. Background technique [0002] Copper-tungsten alloy is a pseudo-alloy formed by uniform mixing of incompatible copper and tungsten phases. It has both the intrinsic physical properties of copper and tungsten, and has high strength, high ablation resistance and welding resistance, and good Due to its electrical and thermal conductivity, it is widely used as the electrical contact material of the core components of various high-voltage circuit breakers. As the core component of the high-voltage circuit breaker, the copper-tungsten contact carries the conduction current. When the current is overloaded, it breaks the fault current in time to ensure the safety of the power grid. However, when the fault current is broken, a high-density large arc will be formed on the surface of the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10H01H1/021
CPCC22C1/1026H01H1/021
Inventor 徐若愚周明瑜庄启恺雷宪章
Owner GLOBAL ENERGY INTERCONNECTION RES INST EURO GMBH
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