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Copper-based electric contact material containing graphene/molybdenum disulfide heterojunctions and preparation method of copper-based electric contact material

An electrical contact material, molybdenum disulfide technology, applied in the direction of molybdenum sulfide, contacts, circuits, etc., can solve the problems of reducing the thermal conductivity or electrical conductivity of composite electrical contact materials, high temperature mechanical properties, wear resistance is not significantly improved, high density, etc. , to achieve the effect of low density, low price and simple preparation process

Inactive Publication Date: 2016-10-12
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of these traditional alloy reinforced electrical contact materials are: high density (>10.22g / cm 3 ),high cost
When using ceramic raw materials for strengthening, such as ZrO 2 , CdO, MgO and other non-metallic materials are used to reinforce copper, which can effectively reduce the density of composite materials, but the introduction of these reinforced ceramic materials will reduce the thermal or electrical conductivity of composite electrical contact materials, and the high-temperature mechanical properties, especially wear resistance, are not significant. improve

Method used

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  • Copper-based electric contact material containing graphene/molybdenum disulfide heterojunctions and preparation method of copper-based electric contact material
  • Copper-based electric contact material containing graphene/molybdenum disulfide heterojunctions and preparation method of copper-based electric contact material
  • Copper-based electric contact material containing graphene/molybdenum disulfide heterojunctions and preparation method of copper-based electric contact material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of copper-based self-lubricating electrical contact materials with graphene / molybdenum disulfide heterojunction:

[0040] (1) Preparation of graphene / molybdenum disulfide heterojunction material:

[0041] First, according to the mass ratio of graphene: hexadecyltrimethylammonium bromide (CTAB) = 1:2, weigh 0.05g graphene and 0.1g CTAB respectively, dissolve them in 40mL deionized water, and ultrasonically disperse them for 30min. Graphene solution with good dispersion;

[0042] Then, according to the molar ratio of sodium molybdate: hydroxylamine hydrochloride: thiourea=1:2.2:2, take by weighing 0.3022g sodium molybdate, 0.1910g hydroxylamine hydrochloride, 0.1902g thiourea and add in the graphene solution successively, magnetic stirring 10min ;

[0043] Finally, transfer the mixed solution into a polytetrafluoroethylene-lined hydrothermal kettle, react at 200°C for 24 hours, centrifuge, collect the product, wash with deionized water and absolute ethanol, ...

Embodiment 2

[0049] Preparation of copper-based self-lubricating electrical contact materials with graphene / molybdenum disulfide heterojunction:

[0050] (1) Preparation of graphene / molybdenum disulfide heterojunction material:

[0051] First, according to the mass ratio of graphene: hexadecyltrimethylammonium bromide (CTAB) = 1:2, weigh 0.05g graphene and 0.1g CTAB respectively, dissolve them in 40mL deionized water, and ultrasonically disperse them for 60min. Graphene solution with good dispersion;

[0052] Then, weigh 0.3022g of sodium molybdate, 0.1910g of hydroxylamine hydrochloride, and 0.1902g of thiourea according to the molar ratio of sodium molybdate: hydroxylamine hydrochloride: thiourea=1:2.2:2 and add them to the graphene solution successively, and magnetically stir for 30min ;

[0053] Finally, transfer the mixed solution into a polytetrafluoroethylene-lined hydrothermal kettle, react at 240°C for 24 hours, centrifuge, collect the product, wash with deionized water and abso...

Embodiment 3

[0059] Preparation of copper-based self-lubricating electrical contact materials with graphene / molybdenum disulfide heterojunction:

[0060] (1) Preparation of graphene / molybdenum disulfide heterojunction material:

[0061] First, according to the mass ratio of graphene: hexadecyltrimethylammonium bromide (CTAB) = 1:2, weigh 0.05g graphene and 0.1g CTAB respectively, dissolve them in 40mL deionized water, and ultrasonically disperse them for 45min. Graphene solution with good dispersion;

[0062] Then, according to the molar ratio of sodium molybdate: hydroxylamine hydrochloride: thiourea=1:2.2:2, take by weighing 0.3022g sodium molybdate, 0.1910g hydroxylamine hydrochloride, 0.1902g thiourea and add in the graphene solution successively, magnetic stirring 20min ;

[0063] Finally, transfer the mixed solution into a polytetrafluoroethylene-lined hydrothermal kettle, react at 220°C for 24 hours, centrifuge, collect the product, wash with deionized water and absolute ethanol, ...

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Abstract

The invention discloses a copper-based electric contact material containing graphene / molybdenum disulfide heterojunctions and a preparation method of the copper-based electric contact material and belongs to the technical field of metal matrix self-lubricating materials. Firstly, graphene serves as the base, sodium molybdate serves as a molybdenum source, thiourea serves as a sulfur source, hydroxylamine hydrochloride serves as a reduction agent, cetyltrimethyl ammonium bromide (CTAB) serves as a surface active agent, and a graphene / molybdenum disulfide heterojunction material is compounded through a hydrothermal method according to a certain proportion; and then copper powder serves as a matrix, and through the matching with heterojunction materials of different proportions, the copper-based electric contact material is obtained by means of a powder metallurgy technique through mixing, cold pressing and vacuum sintering. According to the copper-based electric contact material containing graphene / molybdenum disulfide heterojunctions and the preparation method of the copper-based electric contact material, the excellent mechanical properties and electrical properties of graphene as well as the characteristic of small density are utilized, through the cooperation of the excellent lubricating property of molybdenum disulfide, the hardness and the lubricating property of the material are improved while guaranteeing the conductivity of the composite material, and the specific gravity of the material is reduced; and in addition, the technique is simple, the cost is low, and the obtained composite material has great development prospects in the aspect of self-lubricating electric contact.

Description

technical field [0001] The invention relates to the field of self-lubricating electrical contact materials, in particular to a copper-based self-lubricating electrical contact composite material added with a graphene / molybdenum disulfide heterojunction material and a preparation method thereof. Background technique [0002] Electric contacts are contact elements of electrical switches, instruments and meters, etc., and are mainly responsible for the task of connecting and disconnecting circuits and load currents. Therefore, its performance directly affects the reliable operation of switching devices. The rapid development of modern industry is based on electrification and automation. With the increasing load of high-voltage power transmission and transformation network, the continuous development of low-voltage power distribution system and control system, and the upgrading of electronic industry products, new requirements are put forward for the research and development of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C32/00C22C1/05C22C1/10H01H1/025C01G39/06
CPCC01G39/06C01P2002/72C01P2004/03C22C1/0425C22C1/05C22C9/00C22C32/0089H01H1/025
Inventor 李长生董金泽张帅陈鋆骅徐晶
Owner JIANGSU UNIV
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