Preparation method for nano oxide modified copper-based electric contact material

An electrical contact material, nano-oxide technology, applied in the direction of contacts, circuits, electrical switches, etc., can solve the problems of poor nano-phase dispersion and low density, and achieve high density, reduce porosity, and ensure dispersion. Effect

Active Publication Date: 2014-06-04
宁波坤铜合金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the problems of poor nanophase dispersion and low density of copper-based electrical contact materials prepared by existing methods, and provides a preparation method of nano-oxide modified copper-based electrical contact materials

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  • Preparation method for nano oxide modified copper-based electric contact material

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specific Embodiment approach 1

[0011] Specific Embodiment 1: The preparation method of a nano-oxide modified copper-based electrical contact material in this embodiment is carried out according to the following steps: 1. Weigh metal X, zinc and copper alloy powder, wherein metal X and zinc The mass ratio is any ratio, and the mass ratio of the total amount of metal X and zinc to the copper alloy powder is (1-3): (22-24); 2. Dissolve the metal X and zinc in step 1 in a mass percent Sulfuric acid with a content of 20-25% is dissolved and then mixed, then copper alloy powder is added, and stirred in a water bath at 60-85°C to form a suspension; 3. Add 13-16% sodium carbonate dropwise to the suspension solution until the pH value of the suspension is 7.0 to 7.4, then stand still to obtain a precipitate; 4. Wash the precipitate with distilled water and dry it in vacuum, and then calcinate it under the protection of argon at a temperature of 900 to 950°C. The calcination time is 2-4 hours. After calcination, siev...

specific Embodiment approach 2

[0014] Specific embodiment two: the difference between this embodiment and specific embodiment one is that a 15% sodium carbonate solution is added in step three. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0015] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that the calcination temperature in step 5 is 930° C., and the calcination time is 3 hours. Others are the same as in the first or second embodiment.

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Abstract

A preparation method for a nano oxide modified copper-based electric contact material relates to a preparation method for an electric contact material, and aims to solve the problems that the copper-based electric contact materials prepared through the present method has poor nanophase dispersion and low density. The preparation method comprises the following steps: I, weighing required metals and copper alloy powder; II, dissolving the required metals in sulfuric acid respectively and then mixing, adding the copper alloy powder and stirring to form a turbid liquid; II, dropping a sodium carbonate solution into the turbid liquid, standing to obtain precipitate; IV, washing the precipitate, then drying, calcining and sieving to obtain a mixed powder of a transparent conductive oxide and the copper alloy; and V, cold press molding the mixed powder and then sintering, and extruding and rolling to obtain the nano oxide modified copper-based electric contact material. The copper-based electric contact material prepared by the method has good nanophase dispersion and high density. The preparation method is applied to the field of electrical engineering materials.

Description

technical field [0001] The invention relates to a preparation method of an electrical contact material. Background technique [0002] Electrical contact elements for medium-current and high-current electrical appliances and energy transfer and conversion devices are usually copper-based electrical contact materials manufactured by powder metallurgy. Electrical contact elements serve under alternating load conditions such as mechanical shock and partial arc ablation, so high requirements are placed on the mechanical stability and arc ablation resistance of electrical contact materials. [0003] With the development of nanotechnology, nano-phase modified copper-based composite materials are used more and more as electrical contact materials, especially nano-oxide modified copper-based electrical contact materials show good comprehensive performance in practical use, and have great potential application potential. The nanophase has a high specific surface area, so its powder ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C32/00C22C1/05C22C9/00H01H1/025
Inventor 邵文柱甄良王文寿
Owner 宁波坤铜合金材料有限公司
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