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Preparation method of graphene composite

A composite material, graphene technology, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as affecting the production efficiency of aluminum wires, deteriorating material performance, wire length limitations, etc., to achieve energy saving, good product performance, and stable performance good effect

Inactive Publication Date: 2018-07-27
新疆烯金石墨烯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using the traditional melting casting method, due to the large density difference between the two and the non-wetting of the interface, it is difficult for graphene to disperse uniformly in the aluminum liquid. In addition, the high-temperature interface reaction between the two may occur during the material preparation process to form Al 4 C 3 Brittle phase, deteriorating material properties
A disadvantage of the traditional powder metallurgy method is the discontinuity of production, the length of the wire is limited, and a series of auxiliary operations such as separation, pressing, and filling of the billet are required between the extrusion of the front and rear billets, which affects the production efficiency of the aluminum wire.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of preparation method of graphene composite material, this method comprises the following steps:

[0036] (1) Take graphene and -200~400 purpose alloy powder, graphene accounts for 0.5% of total mass;

[0037] (2) Graphene is ultrasonically dispersed in alcohol solution for 0.5h to obtain a mixed solution of graphene and alcohol;

[0038] (3) Add the alloy powder into the graphene and alcohol mixed solution in batches, at a rotating speed of 100r / min, at a temperature of 40°C, and mix for 2 hours to obtain a semi-solid paste graphene and alloy mixed powder;

[0039] (4) placing the uniformly mixed graphene alloy powder at the feed inlet of the continuous extrusion device;

[0040] (5) Open the feed valve, and perform dynamic vacuum degassing during the downward flow of the graphene alloy mixed powder. The flow rate is 1.0L / min, the heating temperature is 300°C, and the vacuum degree is 2.0×10 -3 Pa;

[0041] (6) Continuously extruding the graphene alloy powder...

Embodiment 2

[0043] A kind of preparation method of graphene composite material, this method comprises the following steps:

[0044] (1) Take graphene and -200~400 purpose alloy powder, graphene accounts for 1.0% of total mass;

[0045] (2) Graphene is ultrasonically dispersed in alcohol solution for 1.0h to obtain a mixed solution of graphene and alcohol;

[0046] (3) adding the alloy powder into the graphene and alcohol mixed solution in batches, at a rotating speed of 500r / min, at a temperature of 60°C, and mixing for 1h to obtain a semi-solid paste graphene alloy mixed powder;

[0047] (4) placing the uniformly mixed graphene alloy powder at the feeding place of the continuous extrusion equipment;

[0048] (5) Open the feed valve, and perform dynamic vacuum degassing during the downward flow of the graphene alloy mixed powder, with a flow rate of 5.0L / min, a heating temperature of 400°C, and a vacuum degree of 5.0×10 -3 Pa;

[0049] (6) Continuously extruding the graphene alloy powder...

Embodiment 3

[0051] A kind of preparation method of graphene composite material, this method comprises the following steps:

[0052] (1) Take graphene and -200~400 purpose alloy powder, graphene accounts for 0.7% of total mass;

[0053] (2) Graphene is ultrasonically dispersed in alcohol solution for 1.5h to obtain a mixed solution of graphene and alcohol;

[0054] (3) Add the alloy powder into the graphene and alcohol mixed solution in batches, at a rotating speed of 250r / min, at a temperature of 50°C, and mix for 1.5h to obtain a semi-solid paste graphene alloy mixed powder;

[0055] (4) placing the uniformly mixed graphene alloy powder at the feeding place of the continuous extrusion equipment;

[0056] (5) Open the feed valve, and perform dynamic vacuum degassing during the downward flow of the graphene alloy mixed powder. The flow rate is 3.5L / min, the heating temperature is 350°C, and the vacuum degree is 3.5×10 -3 Pa;

[0057] (6) Continuously extruding the graphene alloy powder ...

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Abstract

The invention provides a preparation method of a graphene composite. The method comprises the steps of powder mixing, vacuum degassing and continuous extrusion. A device for the continuous extrusion comprises an extrusion module and a powder degassing module. A graphene composite conductor prepared by the method has strength of an alloy and conductivity of pure aluminum; the structural homogenityand performance stability are good; a material utilization rate is high and can reach 95% generally; heat generated by friction is used for raising the temperature; heating is not required; an energysource is saved; the device has few procedures, is high in production efficiency, can achieve continuous production of a product without time intervals and is suitable for large-scale production and small-scale multi-variety production; and the product is high in finished product rate, good in performance, and high in dimensional precision and smoothness.

Description

technical field [0001] The invention relates to a preparation method of a composite material, in particular to a preparation method of a graphene composite material. Background technique [0002] With the improvement of power transmission and transformation technology and the development of power transmission and transformation lines, more and more large spans require the use of wires that can transmit large currents and withstand large tensions. Aluminum alloy wires are more and more showing their superiority in this aspect, and they have exclusive advantages in long-distance, large-span, and ultra-high voltage power transmission. At present, the materials of aluminum alloy wires include pure aluminum and aluminum-magnesium-silicon alloy, but the matching of the mechanical properties and electrical properties of the two is relatively low. Pure aluminum has good electrical conductivity, but its strength is low; the addition of Mg, Si and other alloying elements in aluminum-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C1/10C22C21/00B22F3/22B22F3/20
CPCC22C1/0416C22C1/05C22C1/10C22C21/00B22F3/20B22F3/22B22F2998/10B22F1/10
Inventor 万延彬荣辉卢科伟王杰丰王成军
Owner 新疆烯金石墨烯科技有限公司
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