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Method for preparing silver copper oxide electric contacting material

An electrical contact material, copper oxide technology, applied in the scientific field of metal matrix composite materials, can solve the problems of unseen requirements for the use of high-performance low-voltage electrical appliances, processing difficulties, etc., to achieve mass production, easy control of process flow, and simple preparation Effect

Active Publication Date: 2007-10-17
ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the preparation technologies of these known silver-copper oxide electrical contact materials, there are certain difficulties in the processing of materials with high copper oxide weight percentage content, and there are no silver-copper oxide electrical contact materials produced by these known technologies that can meet the requirements of high-performance low-voltage electrical appliances. Use of required reporting

Method used

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  • Method for preparing silver copper oxide electric contacting material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment one: by 10% copper oxide powder (percentage by weight), 90% silver powder (percentage by weight) as raw material, surface treatment at 180 DEG C for 5 hours, after 12 hours of powder mixing, in 250MPa isostatic pressing It is pressed into an ingot under pressure, sintered at 700°C for 8 hours, and then extruded into a sheet at a temperature of 750°C. After surface treatment and silver coating, the sheet is rolled, punched, and processed into a sheet contact .

Embodiment 2

[0025] Embodiment two: by 15% copper oxide powder (percentage by weight), 84.5% silver powder (percentage by weight) as raw material, and add 0.5% bismuth oxide, surface treatment at 250 ℃ for 8 hours, through 15 hours of powder mixing Finally, it is pressed into an ingot under an isostatic pressure of 270MPa, sintered at 750°C for 10 hours, and then extruded into a plate at a temperature of 750°C. After surface treatment, the plate is rolled and punched into type, processed into chip contacts.

Embodiment 3

[0026] Embodiment three: by 15% copper oxide powder (percentage by weight), 84.7% silver powder (percentage by weight) as raw material, and add 0.3% nickel oxide, surface treatment 8 hours at 250 ℃, through 15 hours of powder mixing Finally, it is pressed into an ingot under an isostatic pressure of 270MPa, sintered at 750°C for 10 hours, and then extruded into a plate at a temperature of 750°C. After surface treatment, the plate is rolled and punched into type, processed into chip contacts.

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Abstract

A method of preparing silver copper oxide electrical contact material is disclosed. The raw material composition, particle size, weight percentage are in that: base metal: silver powder and copper oxide powder have powder particle size of 1.5 mu m -50 mu m, copper oxide powder takes the quantity of more than 2%-25%, based on total weight, the rest is silver; additive: bismuth oxide does not exceed 0.9% of the total weight, nickel oxide does not exceed 1% of total weight. Raw material is surface treated, after batching, the raw material is mixed uniformly in a powder mixing machine to form an isostatic pressing ingot after isostatic pressed; The isostatic pressing ingot is sintered in a heating furnace to obtain a sintered ingot; then the sintered ingot is transported into a extruder to extrude into a plate or wire material. The produced silver copper oxide electrical contact material can satisfy the operation requirement of high-performance low-voltage electrical apparatus, thus is applicable to a DC contactor especially.

Description

Technical field: [0001] The invention belongs to the scientific field of metal matrix composite materials, in particular to a preparation method of a silver-copper oxide electrical contact material. Background technique: [0002] The known preparation methods of silver-copper oxide electrical contact materials are as follows: (1) Prepare copper oxide powder by rapid cooling and solidification technology, mix silver powder and copper oxide powder through mechanical alloying or other methods, and then press into ingots, Silver copper oxide electrical contact materials are made by sintering, extrusion, drawing or rolling process; (2) Silver copper oxide composite powder is prepared by chemical precipitation process, and then pressed into ingot, sintered, extruded, drawn or rolled (3) Silver powder and copper oxide powder are mixed through the process of mixing powder, and then pressed into ingots, sintered, extruded, drawn or rolled to make silver copper oxide electrical contac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16B22F3/20
Inventor 柏小平林万焕张明江刘立强颜小芳母仕华
Owner ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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