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Preparation method of composite nanoparticle-reinforced silver-based electrical contact material

A technology of composite nanoparticles and electrical contact materials, which is applied in circuits, electrical switches, electrical components, etc., can solve the problems that AgMeO electrical contact materials cannot be achieved, AgMeO electrical contacts cannot achieve comprehensive performance, etc. The effect of good arc erosion, improved plastic deformation and low resistivity

Inactive Publication Date: 2018-09-21
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the AgMeO electrical contact materials prepared by these methods are not as good as people's expectations.
The main reason is that the AgMeO electrical contact obtained by any preparation method cannot achieve the comprehensive performance of the AgCdO electrical contact material.

Method used

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  • Preparation method of composite nanoparticle-reinforced silver-based electrical contact material
  • Preparation method of composite nanoparticle-reinforced silver-based electrical contact material
  • Preparation method of composite nanoparticle-reinforced silver-based electrical contact material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 The process flow, using the traditional tungsten plating process, in the commercially available 20nm spherical nano-SnO 2 The surface is coated with a layer of tungsten with a thickness of 12nm; then in a vacuum of 10 -5 Under vacuum conditions, the tungsten-coated SnO 2 The composite nanoparticles were added to the silver melt at a temperature of 1100 ° C, and the tungsten-coated SnO 2 The mass percentage of the composite nanoparticles and the silver melt is 10%, and the stirring rate is 600r / min for mechanical stirring; then after mechanical stirring for 5min, the pouring temperature is 1000°C to pour into an ingot; then the ingot Extruded into a billet at an extrusion temperature of 820°C and an extrusion pressure of 1000MPa; finally, a tungsten-coated SnO 2 Composite nanoparticle-reinforced silver-based electrical contact materials.

[0022] The tungsten-coated SnO prepared in this embodiment 2 Electrical contact erosion pits of composite nano...

Embodiment 2

[0024] Such as figure 1 The process flow, using the traditional tungsten plating process, in the commercially available 100nm spherical nano-SnO 2 The surface is coated with a layer of tungsten with a thickness of 8nm; then in a vacuum of 10 -5 Under vacuum conditions, the tungsten-coated SnO 2 The composite nanoparticles were added to the silver melt at a temperature of 1000 °C, and the tungsten-coated SnO 2 The mass percentage of the composite nanoparticles and the silver melt is 12%, and the stirring rate is 500r / min for mechanical stirring; then after mechanical stirring for 3 minutes, the pouring temperature is 980 ℃ to pour into an ingot; then the ingot Extruded into a billet at an extrusion temperature of 750°C and an extrusion pressure of 1500MPa; finally, a tungsten-coated SnO was obtained using a traditional drawing process. 2 Composite Nanoparticle Reinforced Silver-Based Electrical Contact Filaments.

Embodiment 3

[0026] Such as figure 1 The process flow, using the traditional tungsten plating process, in the commercially available 10nm spherical nano-SnO 2 The surface is coated with a layer of tungsten with a thickness of 10nm; then in a vacuum of 10 -5 Under vacuum conditions, the tungsten-coated SnO 2 The composite nanoparticles were added to the silver melt at a temperature of 980 ° C, and the tungsten-coated SnO 2 The mass percentage of the composite nanoparticles and the silver melt is 17%, and the stirring rate is 1400r / min for mechanical stirring; then after mechanical stirring for 8 minutes, the pouring temperature is 970 ℃ to pour into an ingot; then the ingot Extruded into a billet under the condition of extrusion temperature of 800°C and extrusion pressure of 1200MPa; finally, the traditional rolling process was used to obtain tungsten-coated SnO 2 Composite nanoparticle-reinforced silver-based electrical contact materials.

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Abstract

The invention discloses a preparation method of a composite nanoparticle-reinforced silver-based electrical contact material. The method comprises the following steps: firstly, plating tungsten on a surface of spherical nano-SnO2; then putting the obtained tungsten-coated SnO2 composite nanoparticles into a silver melt; and preparing the material by stirring, pouring, extruding, drawing or rollingprocess. The invention has the advantages that density of the material is greatly increased and the composite nanoparticles can be uniformly distributed on a silver base; compared with a traditionalsilver metal oxide electrical contact material, the composite nanoparticle-reinforced silver-based electrical contact material prepared in the invention has low resistivity, high viscosity of a moltenpool during electrical contact, and good arc erosion resistance.

Description

technical field [0001] The invention relates to a preparation method of composite nanoparticle-reinforced silver-based electrical contact material, which belongs to the technical field of low-voltage electrical contact material. Background technique [0002] The known silver metal oxide electrical contact materials are all granular metal oxide reinforced silver-based composite materials, such as AgSnO 2 , AgCdO, AgZnO, AgREO, etc. Among them, although the AgCdO electrical contact material has excellent comprehensive properties and is called "universal contact material", its use is restricted by the EU ROS directive due to toxicity problems during preparation and use. Several other silver metal oxide materials have been developed in recent years and are considered to be the best electrical contact materials to replace AgCdO composite materials; although these silver metal oxide composite materials can basically meet the market demand, they are not compatible with AgCdO Comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H11/04C22C5/06C22C32/00C22C1/10
CPCH01H11/048C22C1/101C22C1/1036C22C5/06C22C32/0015C22C1/1047
Inventor 周晓龙郭艳欣曹建春黎敬涛
Owner KUNMING UNIV OF SCI & TECH
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