Ag-Ni-oxide electrical contact material and preparation method thereof

An electrical contact material and contact material technology, applied in contact materials, circuits, electrical switches, etc., can solve the problems of excessive additive particles, uneven distribution of additives, and poor welding resistance.

Active Publication Date: 2010-02-17
WENZHOU HONGFENG ELECTRICAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, despite this, the welding resistance of Ag-Ni materials is still inferior to that of Ag-CdO and Ag-SnO2 series materials
In addition, the method of adding additives is b

Method used

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

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Effect test

Embodiment 1

[0045] In this embodiment, the weight percent composition of the novel Ag-Ni-oxide contact material is: Ag-10Ni-0.5CdO-0.5SnO 2 , wherein the average particle size of the oxide is 0.1 μm.

[0046] 1) First, the corresponding proportion of Ag block, Cd and Sn metals are smelted together, and the smelting temperature is 1000°C;

[0047] 2) After that, it is atomized into powder; the method of atomization into powder is to adopt the prior art, that is, to impact the above-mentioned molten liquid metal flow with high-pressure gas or water flow to atomize it into small metal droplets, and then solidify into powder;

[0048] 3) Then pre-oxidize the atomized powder in a high-temperature and high-pressure furnace, the pre-oxidation temperature is 900°C, the oxidation pressure is 3MPa, and the oxidation time is 0.5h;

[0049] 4) Mix the pre-oxidized powder with Ni powder for ball milling, the average particle size of Ni powder is 0.1 μm; the ball milling speed is 200 rpm, the ball mil...

Embodiment 2

[0057] In this embodiment, the weight percent composition of the novel Ag-Ni-oxide contact material is: Ag-10Ni-0.05ZnO-0.05Bi 2 o 3 , wherein the average particle size of the oxide is 1 μm.

[0058] 1) Melt the corresponding proportion of Ag block, Cu and Ni metals together, and the melting temperature is 1300°C;

[0059] 2) atomize it into powder afterwards;

[0060] 3) Then pre-oxidize the atomized powder in a high-temperature and high-pressure furnace, the pre-oxidation temperature is 300°C, the oxidation pressure is 3MPa, and the oxidation time is 10h;

[0061] 4) Mix and ball-mill the pre-oxidized powder with the corresponding Ni powder, the average particle size of the Ni powder is 10 μm; the ball milling speed is 20 rpm, the ball milling time is 20 h, and the ball-to-material ratio is 1:1;

[0062] 5) Then the ball-milled powder is pressed into a green body under an isostatic pressure of 500 MPa;

[0063] 6) Sintering the green compact at 750° C. for 10 h under an ...

Embodiment 3

[0069] In this embodiment, the weight percent composition of the new Ag-Ni-oxide contact material is: Ag-5Ni-1CuO-4NiO, wherein the average particle size of the oxide is 2 μm.

[0070] 1) First, the corresponding proportion of Ag block, Cu and Ni metals are smelted together, and the smelting temperature is 1050°C;

[0071] 2) atomize it into powder afterwards;

[0072] 3) Then preoxidize the atomized powder in a high temperature and high pressure furnace, the preoxidation temperature is 600°C, the oxygen pressure is 3MPa, and the oxidation time is 5h;

[0073] 4) Mix the pre-oxidized powder with corresponding Ni powder and ball mill, the average particle size of Ni powder is 2 μm; the ball milling speed is 100 rpm, the ball milling time is 10 h, and the ball-to-material ratio is 5:1;

[0074] 5) Then the ball-milled powder is pressed into a green body under an isostatic pressure of 400 MPa;

[0075] 6) Sintering the green compact at 900° C. for 8 hours under an Ar gas atmosp...

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Abstract

The invention discloses an Ag-Ni-oxide electrical contact material and a preparation method thereof. The preparation method comprises the following steps: re-oxidizing Ag alloy powder to obtain oxideparticle reinforced Ag base powder, and then mixing with Ni powder to prepare the new Ni particle and oxide particle reinforced Ag-Ni-oxide base electrical contact material. The material comprises thefollowing components by weight percent: 5%<=Ni<=10%, 0.1%<=oxide particle<=5% and the balance Adding. The oxide particle is one or more of CuO, NiO, SnO2, ZnO, CdO, In2O3 and Bi2O3 and the average grain size of oxide and Ni particle is 0.1-10mu m. The reinforced phase particles of the material of the invention are dispersed evenly and have good bonding strength with Adding, and the Ag-Ni-oxide electrical contact material has good fusion welding resistance and electric arc burning loss resistance and higher electrical life.

Description

technical field [0001] The invention relates to an electrical contact material, in particular to an Ag-Ni-oxide electrical contact material and a preparation method thereof. Background technique [0002] Ag-Ni contact material has good electrical and thermal conductivity, low and stable contact resistance, excellent corrosion resistance, easy processing, and excellent welding performance. In addition, the material is cheap to manufacture and suitable for mass production. Therefore, Ag-Ni material has always been the preferred contact material in small and medium capacity control electrical appliances. In recent years, various series of new circuit breakers have been continuously introduced at home and abroad. These new circuit breakers require smaller volume and higher breaking capacity. [0003] Therefore, how to improve the anti-welding performance of AgNi material to expand its current range has important practical value. Regarding the method of improving the welding r...

Claims

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Application Information

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IPC IPC(8): C22C5/06C22C32/00C22C1/02C22C1/05C22C1/10H01H1/02H01H11/04
Inventor 甘可可祁更新陈晓陈乐生
Owner WENZHOU HONGFENG ELECTRICAL ALLOY
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