High temperature resistant silver oxide contact tip material manufacturing method

A contact material, silver oxide technology, applied in electrical components, electrical switches, circuits, etc., to achieve the effect of good high temperature resistance and easy operation

Active Publication Date: 2008-03-05
桂林金格电工电子材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The obtained silver oxide contact material has been widely used in electrical appliances such as relays, contactors, and circuit breakers because of its good electrical conductivity, thermal conductivity, anti-welding resistance, and electrical erosion resistance. However, the materials prepared by the current method are in the The electrical life at high temperature is often much lower than that at room temperature. For example, the electrical life of silver oxide contacts when working at 85°C is only 20% to 30% of that at 25°C.

Method used

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  • High temperature resistant silver oxide contact tip material manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Silver-Sn-Bismuth Alloy Strips Obtained by I Rapid Quenching Method

[0023] 90% silver, 9% tin, and 1% bismuth are melted into a silver alloy in a molten state in an intermediate frequency furnace. The melting temperature is 1050-1500°C. After the metal is melted, keep it warm for 30 minutes.

[0024] As shown in FIG. 1 , a silver alloy strip 2 is obtained by using a single-roller quick quenching strip machine to obtain a silver alloy 1 in a molten state. The nozzle of the belt throwing machine is elliptical, with a short axis of 3 mm and a long axis of 10 mm; during the rapid quenching process, the gas with 80% of the weight of argon and 20% of the weight of air is used to pressurize 0.05MPa, and the speed of the cooling roller 2 is 16m / s, the resulting silver alloy strip 3 has a thickness of 0.2 mm.

[0025] II Silver alloy strips are oxidized into strips mixed with silver, tin oxide and bismuth oxide

[0026] Oxidize the silver alloy strips at 500°C and 10Mpa ox...

Embodiment 2

[0029] I Rapid Quenching Method to Obtain Silver-Zinc Alloy Strips

[0030] 92% silver and 8% zinc are melted into a molten silver alloy in an intermediate frequency furnace. The melting temperature is 1050-1500°C. After the metal is melted, keep it warm for another 20 minutes.

[0031] Silver alloy strips 3 are obtained by using the molten silver alloy 1 with a single-roller quick quenching strip machine. The nozzle of the belt throwing machine is an ellipse with a short axis of 5mm and a long axis of 15mm; in the rapid quenching process, pressurize 0.08MPa with a mixture of 65% by weight of argon and 35% by weight of air, and the speed of the cooling roller 2 is 3m / s, the thickness of the obtained silver alloy strip is 0.5mm.

[0032] II Silver alloy strips are oxidized into strips mixed with silver and zinc oxide

[0033] Oxidize the silver alloy strips at 750°C and 0.2Mpa oxygen pressure for 18 hours, the zinc oxide is evenly distributed in the silver matrix, and the zi...

Embodiment 3

[0036] I Rapid Quenching Method to Obtain Silver-cadmium Alloy Strips

[0037] 89% silver and 11% cadmium are melted into molten silver alloy in an intermediate frequency furnace. The melting temperature is 1050-1500°C. After the metal is melted, keep it warm for another 10 minutes.

[0038] Silver alloy strips are obtained by using a single-roller quick quenching strip machine to melt the silver alloy. The nozzle of the belt throwing machine is elliptical with a minor axis of 2mm and a major axis of 7mm; during the rapid quenching process, the gas with argon weight accounting for 95% and air weight accounting for 5% is used to pressurize 0.02MPa, and the speed of the quenching roller is 30m / s , the thickness of the obtained silver alloy strip is 0.1mm.

[0039] II Silver alloy strips are oxidized into mixed strips of silver and cadmium oxide

[0040] Oxidize the silver alloy strips at 600°C and 0.1Mpa oxygen pressure for 12 hours, the cadmium oxide is uniformly distributed...

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Abstract

This invention relates to a manufacturing method for high temperature silver oxide contactor material including: 1, melting any 1-7 kinds of Sn, Cd, Bi, Cu, In and Fe in certain weight ratio with Ag for rest to alloy them completely to get an Ag strip with a single roller rejection rapid quenching machine, in which, the rotation speed of a cold quenching roller is 3-30m/s, 2, oxidating the Ag alloy strip for 12-24h under 0.1-10MPa and 500-750deg.C, 3, processing it to a contactor material by an ordinary method, in which, size of the metal oxide is small, hardness (HV0.3) can reach to 130 and will not be reduced along the rising of temperature and the contactor can work stably under 85deg.C.

Description

(1) Technical field [0001] The invention relates to a method for manufacturing a silver oxide contact material, in particular to a method for manufacturing a high temperature resistant silver oxide contact material. (2) Background technology [0002] With the continuous development of electrical appliances in the direction of high power and small volume, the current density carried by the contact material in the electrical appliance is increasing, and the temperature rise of the contact material is also increasing. At the same time, in some special environments, electrical appliances are required to work at high temperatures, and the working temperature of the contact material also rises accordingly, so the contact material is required to have better high temperature resistance. [0003] At present, the main preparation methods of silver oxide contact materials mainly include alloy internal oxidation method, powder mixing method, powder oxidation method, chemical coating met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H11/04C22C1/00C22C1/02C22C5/06
Inventor 李恒陈光明侯雪玲姚美意
Owner 桂林金格电工电子材料科技有限公司
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