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A modified flake graphite powder, resin-based carbon brush and preparation method thereof

A flake graphite and resin-based technology, applied in the field of modified flake graphite powder and its preparation, can solve the problems of poor arc ablation resistance, poor flexural strength, poor heat dissipation, etc., and achieve high flexural strength, low cost, matching good effect

Active Publication Date: 2021-04-09
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing resin-based carbon brush materials still have poor heat dissipation, poor arc ablation resistance, poor wear resistance, poor flexural strength, etc., and even cause the motor to be burned

Method used

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  • A modified flake graphite powder, resin-based carbon brush and preparation method thereof
  • A modified flake graphite powder, resin-based carbon brush and preparation method thereof
  • A modified flake graphite powder, resin-based carbon brush and preparation method thereof

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Embodiment 1

[0038] The modified flake graphite powder of this embodiment is composed of flake graphite and tungsten alloy powder coated on the surface of the flake graphite, wherein the tungsten alloy powder is tungsten copper alloy powder, its mass is 5% of the flake graphite, and the particle size is 0.2 μm, the SEM photo of the modified flake graphite is as shown in the accompanying drawing figure 1 shown.

[0039] The preparation method of the modified flake graphite powder of the present embodiment may further comprise the steps:

[0040] (1) preparation concentration is the carboxymethyl cellulose solution of 1%;

[0041] (2) Add the flake graphite powder into the carboxymethyl cellulose solution, after ultrasonic stirring for 2 hours under the condition of 60°C, place it in a tray and put it in an oven to dry the water, and pass the obtained material through a 200-mesh sieve to obtain Treated graphite powder, standby;

[0042] (3) Add the treated graphite powder into deionized w...

Embodiment 2

[0051] The modified flake graphite powder of this embodiment is composed of flake graphite and tungsten alloy powder coated on the surface of the flake graphite, wherein the tungsten alloy powder is tungsten copper alloy powder, its mass is 5% of the flake graphite, and the particle size is 0.2 μm.

[0052] The preparation method of the modified flake graphite powder of the present embodiment may further comprise the steps:

[0053] (1) preparation concentration is the carboxymethyl cellulose solution of 1%;

[0054] (2) Add the flake graphite powder into the carboxymethyl cellulose solution, after ultrasonic stirring for 2 hours under the condition of 60°C, place it in a tray and put it in an oven to dry the water, and pass the obtained material through a 200-mesh sieve to obtain Treated graphite powder, standby;

[0055] (3) Add the treated graphite powder into deionized water, stir at room temperature until the system is in a suspension state, add tungsten alloy powder un...

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Abstract

The invention discloses a modified flake graphite powder, a resin-based carbon brush and a preparation method thereof. The modified flake graphite powder includes flake graphite and tungsten alloy powder coated on the surface of the flake graphite, and the quality of the tungsten alloy powder is the mass of the flake graphite. 5%-15%; the resin-based carbon brush includes the following components in parts by mass: 70-80 parts of modified flake graphite powder, 20-30 parts of epoxy resin, and 4-5 parts of curing agent. The modified flake graphite powder of the present invention has the advantages of good dispersibility and can be used as an additive to increase the wear resistance, mechanical strength, electrical conductivity and arc ablation resistance of the material; the resin-based carbon brush of the present invention has electrical resistivity and thermal conductivity Suitable, good arc ablation resistance to the wear surface, high flexural strength and long service life.

Description

technical field [0001] The invention belongs to the field of carbon graphite materials, in particular to a modified flake graphite powder and its preparation method and application. Background technique [0002] Flake graphite has good thermal conductivity, electrical conductivity, thermal shock resistance and corrosion resistance, and is used in many fields, but pure flake graphite can improve the wear resistance and arc ablation resistance of materials more Limited, therefore, the flake graphite needs to be modified. Existing methods for modifying flake graphite include surface etching and electroplating. The surface etching method will destroy the original morphology of flake graphite, and the sulfuric acid used in this method has certain dangers; while the electroplating method mainly covers The most important thing is metal copper, which mainly improves the conductivity of the resin-based graphite composite material, which is difficult to take into account other proper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K3/08C08K7/00C08K3/04C08L63/00C09K5/14H01R39/26
CPCC08K3/04C08K3/08C08K7/00C08K9/10C08K2003/0887C08K2201/001C08L2203/20C09K5/14H01R39/26C08L63/00
Inventor 涂川俊巩佩吴广宁任改梅洪莉睿陈刚
Owner HUNAN UNIV
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