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Preparation method of AgMoS2 sliding electric contact material

A sliding electrical contact, silver molybdenum sulfide technology, applied in the direction of cable/conductor manufacturing, circuits, electrical components, etc., can solve the unstable conductivity and wear resistance of composite materials, affect the stability and accuracy of circuit systems, and interface bonding Poor and other problems, to achieve good market prospects, good conductivity, high density effect

Active Publication Date: 2016-12-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this process is that it is easy to operate, and different MoS can be prepared according to actual needs. 2 content of AgMoS 2 Composite material; the disadvantage is Ag and MoS 2 The interface of MoS is easy to be polluted in the preparation, the interface is poorly bonded, and the MoS 2 The distribution of particles in the silver matrix is ​​not uniform, resulting in AgMoS 2 The instability of electrical conductivity and wear resistance of composite materials seriously affects the stability and accuracy of the circuit system

Method used

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  • Preparation method of AgMoS2 sliding electric contact material
  • Preparation method of AgMoS2 sliding electric contact material

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Such as figure 2 The process flow, the MoS with a particle size of 50nm 2 The powder is granulated into 0.1mm spherical particles, and the 0.1mm particles are bonded with epoxy resin as figure 1 In the hexagon (the area surrounded by the hexagonal particle group is about 80 square millimeters), 10 hexagons are bonded into a hexagonal MoS with a thickness of 1mm 2 particle swarm; then multiple hexagonal MoS 2 The particle group is bonded to the inner wall of the carbon-sprayed casting mold, and makes the MoS 2 The distance between the particle group and the particle group is kept 10mm; finally, the molten silver liquid (covered with activated carbon) at 980°C is poured into the casting mold at a pouring temperature of 970°C to obtain MoS 2 Enhanced AgMoS 2 Sliding electrical contact material.

Embodiment 2

[0022] Such as figure 2 The process flow, the MoS with a particle size of 800nm 2 The powder is granulated into 0.01mm spherical particles, and the 0.01mm particles are bonded with epoxy resin as figure 1 In the square (the area surrounded by the square particle group is about 5 square millimeters), 50 squares are bonded into a square MoS with a thickness of 0.5mm 2 particle group; then a plurality of this square MoS 2 The particle group is bonded to the inner wall of the carbon-sprayed casting mold, and makes the MoS 2 The distance between the particle group and the particle group is kept 2mm; finally, the molten silver solution (surface layer covered with activated carbon) at 1020°C is poured into the casting mold at a pouring temperature of 1000°C to obtain MoS 2 Enhanced AgMoS 2 Sliding electrical contact material.

Embodiment 3

[0024] Such as figure 2 The process flow is to granulate graphite powder with a particle size of 50um into spherical particles of 0.5mm, and bond the 0.5mm particles with epoxy resin to form figure 1 The rod shape in , and makes the MoS of the rod 2 The diameter of the particle group reaches 2mm; then a plurality of round rods MoS with a diameter of 2mm 2 The particle group is bonded to the inner wall of the carbon-sprayed casting mold, and makes the MoS 2 The distance between the particle group and the particle group is kept 5mm; finally, the molten silver solution (surface layer covered with activated carbon) at 1100°C is poured into the casting mold at a pouring temperature of 1050°C to obtain MoS 2 Enhanced AgMoS 2 Sliding electrical contact material.

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Abstract

The invention discloses a preparation method of a AgMoS2 sliding electric contact material and belongs to the technical field of sliding electric contact materials. The preparation method comprises the following steps: pelleting MoS2 powder in nanometer(micrometer) granularity and with self-lubricating property to obtain spherical particles with the granularity ranging from about 0.01-1.5 mm, bonding the spherical particles into particle clusters of different shapes with epoxy resin, bonding the spherical particles into particle clusters of different shapes on the inner surface of a die, and finally, pouring molten liquid silver into the formed die to prepare the silver-based sliding electric contact material of MoS2 particle clusters, wherein hexagons, pentagons, circles or different shapes are uniformly distributed on the surface of the silver-based sliding electric contact material, and the silver-based sliding electric contact material has the self-lubricating property. The preparation method has the following advantages: the production cycle is short, the technology is simple, the raw materials are not wasted, and the technologies including powder mixing, extrusion and drawing forming are not needed; and in addition, as the pouring technology is adopted, the AgMoS2 sliding electric contact material prepared through the preparation method disclosed by the invention has the advantages of high electric conductivity and excellent electrical wear resistance compared with the AgMoS2 sliding electric contact material prepared through the current powder electrical wear technology.

Description

technical field [0001] The invention relates to a method for preparing a silver-molybdenum sulfide sliding electrical contact material. The silver-based sliding electrical contact material with self-lubricating particle molybdenum sulfide distributed on the surface is prepared by a melting and casting method, and belongs to the technical field of sliding electrical contact materials. Background technique [0002] Silver molybdenum sulfide (AgMoS 2 ) Composite material is a kind of sliding electrical contact material widely used in satellites and other space agencies. Its main function is to transmit the electric power and telemetry signals of satellite solar cell arrays to the satellite body. The quality of its performance directly determines the stability, accuracy and life of the circuit system. [0003] Conventional AgMoS 2 The preparation technology of composite material contact materials mainly adopts powder metallurgy technology, and the process is to combine Ag powd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C5/06C22C32/00H01B13/00
CPCH01B13/00C22C1/1015C22C1/1036C22C5/06C22C32/0089C22C1/1052
Inventor 周晓龙周兆波曹建春
Owner KUNMING UNIV OF SCI & TECH
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