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Single-layer graphene/aluminum composite material and preparation method thereof

A technology of single-layer graphene and aluminum composite materials, applied in the direction of conductive materials, conductive materials, metal/alloy conductors, etc., can solve the problems that the expected effect of uniform dispersion is not achieved, the comprehensive performance of composite materials is not obvious, and the cost is low , Reasonable composition ratio and simple production process

Inactive Publication Date: 2018-02-09
广州埃米石墨烯科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent (CN201410280611.6) reports a preparation method of graphene / aluminum composite material. The method of mechanical ball milling is used to prepare graphene / aluminum composite powder, and then the green body obtained by cold pressing the composite powder is stirred into the aluminum melt and cast into ingots, but the overall performance of the obtained composite materials is not significantly improved. This is because the graphene sheets are agglomerated and floated during the process of stirring and dissolving the green body obtained by cold pressing of the graphene / aluminum composite powder. Did not achieve the expected effect of uniform dispersion in the aluminum matrix

Method used

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  • Single-layer graphene/aluminum composite material and preparation method thereof
  • Single-layer graphene/aluminum composite material and preparation method thereof
  • Single-layer graphene/aluminum composite material and preparation method thereof

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Embodiment 1

[0032] It is 0.1% graphene / aluminum composite material to prepare graphene dosage, and preparation method is: 1) prepare mass fraction concentration by ultrasonic dispersion method and be 0.5% monolayer graphene alcohol dispersion; 2) by mass fraction 0.5% graphene : the ratio of 99.5% superfine aluminum powder, the purity of pure aluminum powder is 99.9%, and the number of orders is 600 orders. Pure aluminum powder is added in the single-layer graphene alcohol dispersion in step 1), and under argon protection Lower the ball mill and mix for 6 hours, the ball mill speed is 200r / min, and then dry in a vacuum oven at 50°C to obtain a single-layer graphene / aluminum composite powder; 3) Pass the single-layer graphene / aluminum composite powder in step 2) through Prepare the preform by spark plasma sintering, the sintering temperature is 400°C, the sintering time is 5min, and the axial pressure is 5MPa; 4) Melt the pure aluminum at a temperature of 720°C, and degas and remove slag; 5...

Embodiment 2

[0035]It is 0.2% graphene / aluminum composite material to prepare graphene dosage, and preparation method is: 1) prepare the single-layer graphene alcohol dispersion liquid that mass fraction concentration is 1% by ultrasonic dispersion method; 2) by mass fraction 1% graphite Graphene: the ratio of 99% ultrafine aluminum powder, the pure aluminum powder is 600 mesh, the pure aluminum powder is added to the single-layer graphene alcohol dispersion in step 1), and ball milled and mixed for 12h under the protection of argon, ball milled The rotation speed is 400r / min, and then dried in a vacuum drying oven at 80°C to obtain a single-layer graphene / aluminum composite powder; 3) The single-layer graphene / aluminum composite powder in step 2 is prepared into a prefabricated body by spark plasma sintering , the sintering temperature is 500°C, the sintering time is 10min, and the axial pressure is 20MPa; 4) Melt pure Al at a temperature of 740°C, and remove gas and slag; 5) At a stirring...

Embodiment 3

[0038] Prepare the graphene / aluminum alloy composite material that the graphene dosage is 0.1%, the aluminum alloy is Al-0.05Si-0.03Cu-0.02Fe, the composite material preparation method is: 1) prepare mass fraction concentration by ultrasonic dispersion method and be 1% Single-layer graphene alcohol dispersion; 2) by mass fraction 1% graphene: 99% ultra-fine aluminum powder ratio, pure aluminum powder is 600 orders, pure aluminum powder is added to the single-layer graphene alcohol in step 1) Dispersion liquid, and ball milling and mixing for 12h under the protection of argon, the ball milling speed is 400r / min, and then drying in a vacuum oven at 80°C to obtain a single-layer graphene / aluminum composite powder; 3) the single-layer graphene / aluminum composite powder in step 2) Layer graphene / aluminum composite powder is prepared into a preform by spark plasma sintering, the sintering temperature is 500°C, the sintering time is 10min, and the axial pressure is 20MPa; 4) The alloy...

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Abstract

The invention relates to a single-layer graphene / aluminum composite material and a preparation method thereof. The preparation method comprises the following specific steps: (1) single-layer graphenepowder is added in anhydrous ethanol for ultrasonic dispersion to obtain single-layer graphene dispersion liquid; (2) aluminum powder is added in the single-layer graphene dispersion liquid for mixingball mill under argon protection, and is dried in vacuum to obtain single-layer graphene / aluminum composite powder; (3) the single-layer graphene / aluminum composite powder is prepared through a discharge plasma sintering method to obtain a single-layer graphene / aluminum prefabricated body; and (4) a pure aluminum block body or an aluminum alloy block body is smelted to obtain molten aluminum; then, heating is performed; and under the stirring condition, the single-layer graphene / aluminum prefabricated body is dispersed in the molten aluminum, is cast as a round ingot, and is thermally extruded to mold the single-layer graphene / aluminum composite material. The single-layer graphene / aluminum composite material is uniform in component, high in strength and electric conductivity, simple in production process and capable of realizing industrial production.

Description

technical field [0001] The invention relates to the technical field of metal matrix composite materials, in particular to a single-layer graphene / aluminum composite material and a preparation method thereof. Background technique [0002] Due to the large span suspended in the air, the overhead high-voltage transmission line not only has certain requirements for the conductivity of the conductor and cable, but also has certain requirements for the strength of the conductor and cable. At present, the commonly used overhead high-voltage transmission wires at home and abroad include copper wires and aluminum wires. Compared with aluminum wires, copper wires have better conductivity and higher strength, but the cost of copper wires is higher, and copper is a strategic resource, while aluminum resources are abundant, widely distributed, and low in cost. Therefore, it is necessary to increase the overhead high-voltage transmission Development and application of cables with aluminu...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/10H01B1/02
CPCH01B1/023C22C1/1015C22C1/1036C22C21/00C22C1/1047
Inventor 范国强张敏吴素芹
Owner 广州埃米石墨烯科技有限公司
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