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Graphene oxide calcined electrical contact material and preparation method thereof

An electrical contact material, graphene technology, applied in the direction of circuits, electrical components, piezoelectric/electrostrictive/magnetostrictive devices, etc., can solve the problems of insufficient bonding strength, easy cracking of products, poor uniformity, etc., to achieve compensation Non-abrasion resistant, excellent thermal conductivity, thermal conductivity and wear resistance

Active Publication Date: 2016-05-04
窦钦宝
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to give full play to the above-mentioned excellent properties of graphene oxide and develop a new type of carbon-based electrical contact material, it is necessary to solve the problems of insufficient bonding strength and poor uniformity that often occur in the process of toughening electrical carbon materials in existing materials with large specific surface areas. , the problem that the product is easy to crack, and at the same time, it is necessary to take into account the characteristics of increasing friction and reducing friction of the graphene oxide electrical contact material, which has become a problem faced by those skilled in the art

Method used

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  • Graphene oxide calcined electrical contact material and preparation method thereof
  • Graphene oxide calcined electrical contact material and preparation method thereof
  • Graphene oxide calcined electrical contact material and preparation method thereof

Examples

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Embodiment 1

[0056] A graphene oxide-based roasted electrical contact material of the present invention, which uses graphene oxide as a base material, and at least two of phenolic resin, epoxy resin, and modified coal tar pitch as a binder. The agent includes a powder-making binder and a forming binder, wherein graphene oxide is kneaded, formed and roasted with the forming binder in the form of a primary processing and roasting powder, and the primary processing and roasting powder is made of graphene oxide and The powder binder is obtained after kneading, molding, roasting and crushing. The powder-making binder in this embodiment is a combination of phenolic resin and epoxy resin; the molding binder is a combination of phenolic resin and modified coal tar pitch.

[0057] Such as figure 1 As shown, the preparation method of the above-mentioned graphene oxide fired electrical contact material in this embodiment includes the following steps:

[0058] a) Ultrasonic dispersion of graphene ox...

Embodiment 2

[0079] A graphene oxide-based roasted electrical contact material of the present invention, which uses graphene oxide as a base material, and at least two of phenolic resin, epoxy resin, and modified coal tar pitch as a binder. The agent includes a powder-making binder and a forming binder, wherein graphene oxide is kneaded, formed and roasted with the forming binder in the form of a primary processing and roasting powder, and the primary processing and roasting powder is made of graphene oxide and The powder binder is obtained after kneading, molding, roasting and crushing. The powder-making binder in this embodiment is a combination of phenolic resin and epoxy resin; the molding binder is a combination of phenolic resin and modified coal tar pitch.

[0080] Such as figure 1 As shown, the preparation method of the above-mentioned graphene oxide fired electrical contact material in this embodiment includes the following steps:

[0081] a) Ultrasonic dispersion of graphene ox...

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Abstract

A kind of graphene oxide roasted electrical contact material, which uses graphene oxide, powder-making binder and molding binder as raw materials. Graphene oxide is in the form of a once-processed roasted powder and molding binder. Kneading, shaping and roasting are carried out. The one-time roasted powder is produced by kneading, shaping and roasting graphene oxide and pulverizing binder. The preparation method of the electrical contact material includes the following steps: ultrasonic dispersing graphene oxide and then adding it to the powder-making binder; kneading, rolling, crushing, grinding, mixing and shaping the mixture once The roasted powder is obtained by roasting in one process; it is used as a filler and directly added to the molding binder for strong kneading; it is then rolled, crushed, ground, and mixed for secondary pressing and molding; the formed blank is then subjected to secondary pressing. Second roasting to obtain the product. The product of the invention has the advantages of high strength, high toughness, high conductivity, good heat resistance, arc suppression and wear resistance.

Description

technical field [0001] The invention belongs to the field of electrical contact materials and preparation thereof, in particular to a graphene oxide electrical contact material and a preparation method thereof. Background technique [0002] Sliding (rotating) dynamic electrical contact materials are key components in various electrical appliances, and their performance is directly related to the reliability, stability and service life of motors, instruments and circuits. Sliding (turning) electrokinetic contact materials are mainly used in high-speed electrified railway systems (including high-speed rail, subway, light rail and maglev trains, etc.) Carbon brushes and collector rings of motors widely used in industry (including DC motors, locomotive traction motors, rolling mills, exciters, etc.), rectifiers and high-power high-speed motors during launch of launch vehicles. [0003] The existing sliding (rotating) electrokinetic contact materials are often difficult to coord...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/187C04B35/532C04B35/622H10N30/853
Inventor 涂川俊邓联谱陈刚冯鹏洋朱雨盛华东
Owner 窦钦宝