Silver metallic oxide electric contact material and preparation method thereof

A technology of oxide electricity and contact materials, which is applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of environmental pollution and high comprehensive cost, and achieve the goal of improving bonding strength, eliminating uneven distribution, and making the preparation process environmentally friendly. Effect

Inactive Publication Date: 2020-07-31
ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method uses nano-scale uniform and fine particles, which increases the contact area between silver and metal oxides, and improves the wettability with the silver matrix. However, the wastewater generated during the chemical coating process causes serious pollution to the environment. Comprehensive cost is higher than traditional powder metallurgy process

Method used

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  • Silver metallic oxide electric contact material and preparation method thereof
  • Silver metallic oxide electric contact material and preparation method thereof
  • Silver metallic oxide electric contact material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] a) 18kg silver is melted in the graphite crucible of intermediate frequency smelting furnace, forms silver melt;

[0039] b) 1.8 kg of SnO with an average particle size of 0.1 μm 2 powder and 0.2kg of WO with an average particle size of 1 μm 3 Mix the powder evenly, put it into the powder spraying device, and connect it with the upper spray plate of the high-pressure water atomization equipment; set the pressure of high-purity nitrogen in the powder spraying equipment to 0.2MPa, and the flow rate of the inert gas to 200L / min;

[0040] c) The lower spray plate of the high-pressure water atomization equipment is connected to high-pressure water, the water pressure is set to 20MPa, and the atomization equipment is turned on;

[0041] d) The molten silver is poured into the collection bucket from the center of the spray plate of the high-pressure water atomization equipment through the heat preservation crucible, and the powder spraying device is turned on, with high-purit...

Embodiment 2

[0045] a) 9kg of silver is melted in the graphite crucible of the intermediate frequency melting furnace to form silver melt;

[0046] b) Mix 0.9kg of CuO powder with an average particle size of 10μm, 0.05kg of NiO powder with an average particle size of 1μm, and 0.05kg of MgO powder with an average particle size of 12μm, put them into the powder spraying device, and connect them to the upper spray plate of the high-pressure water atomization equipment Pass; set the pressure of high-purity argon in the powder spraying equipment to 1.0MPa, and the flow rate of inert gas to 1000L / min;

[0047] c) The lower spray plate of the high-pressure water atomization equipment is connected to high-pressure water, the water pressure is set to 200MPa, and the atomization equipment is turned on;

[0048] d) The molten silver is poured into the collection bucket from the center of the spray plate of the high-pressure water atomization equipment through the heat preservation crucible, and the p...

Embodiment 3

[0052] a) 18.4kg silver is melted in the graphite crucible of intermediate frequency smelting furnace, forms silver melt;

[0053] b) 1.4 kg of ZnO powder with an average particle size of 2.5 μm and 0.1 kg of SnO with an average particle size of 2 μm 2 Powder, 0.1kg of La with an average particle size of 10μm 2 o 3 Mix the powder evenly, put it into the powder spraying device, and connect it to the upper spray plate of the high-pressure water atomization equipment; set the pressure of high-purity nitrogen in the powder spraying equipment to 0.5MPa, and the flow rate of the inert gas to 600L / min;

[0054] c) The lower spray plate of the high-pressure water atomization equipment is connected to high-pressure water, the water pressure is set to 100MPa, and the atomization equipment is turned on;

[0055] d) The molten silver is poured into the collection bucket from the center of the spray plate of the high-pressure water atomization equipment through the heat preservation cruc...

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Abstract

The invention discloses a silver metallic oxide electric contact material and a preparation method thereof. Powder preparation and powder mixing integrated equipment is adopted, a spray disc on the upper layer is connected with a powder spray device, a spray disc on the lower layer is connected with high-pressure water, and dispersion strengthening phase mixed powder is loaded into the powder spray device; in the process of preparing silver powder through high-pressure water atomization, inert gas is used as a carrier to spray the dispersion strengthening phase mixed powder into a silver solution; the solid-state dispersion strengthening phase mixed powder is wrapped by high-temperature liquid silver to form stable metallurgical bonding; and then high-pressure water crushing and cooling are carried out to form even mixed powder particles, and the mixed powder particles are processed into the electric contact material through the procedures of drying, ingot pressing, extruding and the like. Compared with a traditional powder metallurgy process, the silver metallic oxide electric contact material has the remarkable advantages that the distribution evenness of dispersion strengtheningphase particles in a silver matrix is high, the bonding strength of the dispersion strengthening phase particles and the silver matrix is high, the preparation process is green and environment-friendly, and the production period is short.

Description

technical field [0001] The invention belongs to the field of electrical contact materials, in particular to a silver metal oxide electrical contact material and a preparation method thereof. Background technique [0002] At present, silver-based materials are mostly used as electrical contact materials in the low-voltage electrical industry, and among them, silver metal oxide (AgMeO, Me refers to metal) materials are due to their excellent arc corrosion resistance, welding resistance and low and stable The comprehensive electrical properties of contact resistance play an important role in the entire electrical contact material system. The metal oxides in the silver matrix belong to the dispersion strengthening phase for the silver matrix, and the arc erosion resistance and welding resistance of the silver matrix are improved through dispersion strengthening. Therefore, the distribution uniformity of the strengthening phase in the silver matrix and The bonding strength betwe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08H01B1/16
CPCB22F9/082H01B1/16B22F2009/0828B22F2009/0844B22F2009/0888
Inventor 万岱缪仁梁张明江张海金妹鲁香粉陈松扬夏宗斌宋振阳王宝锋
Owner ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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