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Novel Ag-Ni electrical contact material and preparation method thereof

An electric contact material, ag-ni technology, applied in the direction of contacts, circuits, electric switches, etc., can solve the problems of material transfer service life, reduction, application restrictions, etc., to achieve improved life, excellent comprehensive performance, anti-welding good sex effect

Inactive Publication Date: 2019-05-10
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the Ag-Ni contact material has many advantages above, it is very easy to produce fusion welding, and it is prone to material transfer under the erosion of the arc, which greatly reduces its service life. Therefore, the application of Ag-Ni electrical contact materials has been greatly affected. limit

Method used

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  • Novel Ag-Ni electrical contact material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Weigh 43 grams of silver nitrate and 3.41 grams of PVP to make 340ml solution, and prepare Na 2 CO 3 The aqueous solution of precipitating agent is dropped into the above solution to obtain Ag 2 CO 3 Precipitate the separated body and wash it several times, add deionized water, and sonicate for 30 minutes to make suspension A; weigh Ni powder (0.5-2μm)3, TiB 2 Powder ((0.5~2μm) 0.15g, add deionized water, ultrasonic 40min to make suspension B; pour suspension B into container A and stir (800 rpm) for 30min, dehydrate with alcohol, dry, grind. Finally Calcined at 350°C for 3h and ground to produce Ag-Ni-TiB 2 Composite powder. After initial pressing, initial firing, re-pressing, re-firing, second re-pressing, and second re-firing, the contact material sheet is made. After rolling and deformation, the density reaches more than 98%, the hardness is 110HV, and the arc erosion voltage is increased from 600V. to 800V.

Embodiment 2

[0059] Weigh 43 grams of silver nitrate and 3.41 grams of PVP to make a 340ml solution, add the precipitant solution dropwise into the above solution, wash it several times, add deionized water, and ultrasonically 20-40min to make a suspension A; weigh Ni powder (0.5~2μm)3g, TiB 2 Powder (0.5-2μm) 0.3g, add deionized water, ultrasonic 40min, make suspension B; pour B suspension into A container and stir (500 rpm) for 45min, alcohol dehydration, dry. Finally, it is calcined at 350°C for 3 hours and ground to obtain Ag-ZnO-TiB 2 Composite powder. After initial pressing, initial firing, re-pressing, re-firing, second re-pressing, second re-firing, and then rolling into contact materials of different thicknesses. The density reaches over 98%, the hardness is 120, and the arc erosion voltage can be increased to 1000V.

Embodiment 3

[0061] Take by weighing 43 grams of silver nitrate and 3.41 grams of PVP to make 340ml solution, add precipitant solution and drop into the above solution, wash repeatedly, add deionized water, ultrasonic 40min, make suspension A; take Ni powder (0.5 ~2 μm) 3 g, TiB 2 Powder (0.5~2μm) 0.4g, TiC powder (0.5~2μm) 0.1g, add deionized water, ultrasonic 40min, make suspension B; pour B suspension into A container and stir (600 rpm) for 40min , Alcohol dehydration, dry. Finally, it is calcined at 350°C for 3 hours and ground to obtain Ag-Ni-TiB 2 -TiC composite powder. After initial pressing, initial firing, re-pressing, re-firing, second re-pressing, second re-firing, and then rolling to obtain finished products. The hardness is 115HV, and the density reaches 98%.

[0062] Attached Table 1 Performance Comparison of Embodiments

[0063]

[0064] Through the above simple preparation process, a new type of Ag-Ni-TiB with excellent performance can be prepared 2 +TiC electrical...

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Abstract

The invention discloses a novel Ag-Ni electrical contact material. The material comprises the following components of, by mass, 5-40% of Ni, 0.3-5% of TiB2 and the balance Ag. The novel Ag-Ni electrical contact material prepared through the method has the advantages of high hardness, good welding resistance, electric arc ablation resistance and excellent comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy silver-based electrical contact materials, and in particular relates to a novel Ag-Ni electrical contact material and a preparation method thereof. Background technique [0002] Ag-Ni electrical contact material has excellent electrical and thermal conductivity, and its contact resistance is small and very stable. In addition, the material also has good plastic processing performance and is easy to process into various parts, so Ag-Ni contact material Widely used in various micro switches, circuit breakers, relays and other products. Although the Ag-Ni contact material has many advantages above, it is very easy to produce welding, and it is prone to material transfer under the erosion of the arc, which greatly reduces its service life. Therefore, the application of Ag-Ni electrical contact materials has been greatly affected. limit. Contents of the invention [0003] The technical pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/06C22C32/00C22C1/05B22F3/16B22F9/22H01H1/023H01H11/04
Inventor 秦国义韩金峰郭锦新许思勇毛勇
Owner YUNNAN UNIV
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