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Preparation method of silver-rare earth refractory metal oxide electrical contact material

A technology of refractory metal and oxide electricity, applied in the direction of oxide conductors, non-metal conductors, metal/alloy conductors, etc., can solve the problems of poor material plasticity, difficult processing and temperature rise, etc., and achieve long service life and high mechanical strength , the effect of good conductivity

Active Publication Date: 2012-08-29
郴州雄风环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a preparation method of a silver rare refractory metal oxide electrical contact material, which can replace the toxic silver cadmium oxide electrical contact material , better solve the problems of poor plasticity, difficult processing and temperature rise of the electrical contact material, improve the comprehensive performance of the material, and the prepared electrical contact material can reduce the consumption of silver, the cost is lower, and the service life is longer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A preparation method of silver rare refractory metal oxide electrical contact material, taking 45% of silver powder, 20% of titanium dioxide powder, 8% of vanadium pentoxide powder, 2% of zirconium dioxide powder, 17% of blue tungsten powder, and 8% of tin powder %; mixed to obtain a mixed powder; put it into a planetary ball mill for grinding under an argon protective atmosphere, and grind it to 350 mesh; the grinding ball and the grinding jar are made of corundum or agate material, the speed is 1200r / min, and the ball milling time is 15 hours; then Send the ground powder to the steel mold for two-way pressing with a pressure of 800MPa; press it into a biscuit; control the sintering temperature of the biscuit at 900°C for 2 hours; repress the sintered ingot and refire it at 1000°C for 2 hours; The repressed and refired blank is extruded and drawn at 650°C to make qualified silver rare refractory metal oxide electrical contact material wire. The silk material prepared b...

Embodiment 2

[0015] A preparation method of silver rare refractory metal oxide electrical contact material, taking 50% of silver powder, 15% of titanium dioxide powder, 5% of vanadium pentoxide powder, 1% of zirconium dioxide powder, 20% of blue tungsten powder, and 9% of tin powder %; mixed to obtain a mixed powder; put it into a planetary ball mill for grinding under an argon protective atmosphere, and grind it to 320 mesh; the grinding ball and the grinding pot are made of corundum or agate material, the speed is 1000r / min, and the ball milling time is 8 hours; then Send the ground powder to the steel mold for two-way pressing with a pressure of 750MPa; press it into a green body; control the sintering temperature of the green body at 880°C for 3 hours; re-press the sintered ingot and re-fire it at 1100°C for 4 hours; finally The repressed and refired blank is extruded and drawn at 600°C to make qualified silver rare refractory metal oxide electrical contact material wire. The silk mate...

Embodiment 3

[0017] A preparation method of silver rare refractory metal oxide electrical contact material, taking 55% of silver powder, 12% of titanium dioxide powder, 5% of vanadium pentoxide powder, 2% of zirconium dioxide powder, 21% of blue tungsten powder, and 5% of tin powder %; mixed to obtain a mixed powder; put it into a planetary ball mill for grinding under an argon protective atmosphere, and grind it to 330 mesh; the grinding ball and the grinding jar are made of corundum or agate material, the speed is 920r / min, and the ball milling time is 10 hours; Send the ground powder to the steel mold for two-way pressing with a pressure of 900MPa; press it into a biscuit; control the sintering temperature of the biscuit at 900°C for 4 hours; repress the sintered ingot and re-fire it at 1200°C for 3 hours; finally The repressed and refired blank is extruded and drawn at 650°C to make qualified silver rare refractory metal oxide electrical contact material wire. The wire structure prepar...

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Abstract

The invention relates to a preparation method of a silver-rare earth refractory metal oxide electrical contact material, and belongs to the technical field of electrical materials. The preparation method comprises the following steps: adding raw material components namely titanium dioxide powder, vanadium pentoxide powder, zirconium dioxide powder, blue tungsten oxide powder and the balance of tin powder to sliver matrix powder, and mixing to obtain mixed powder; finely grinding the mixed powder into 320-350 mesh under an argon protective atmosphere, and pressing the fine powder into a green body; sintering the green body at the controlled temperature of 850-900 DEG C for 2-5 hours; repressing the sintered ingot blank, and resintering the repressed sintered ingot blank at the temperature of 950-1200 DEG C for 2-4 hours; and extruding and molding the repressed and resintered ingot blank and then performing wire drawing at the temperature of 600-650 DEG C, and finally obtaining the silver-rare earth refractory metal oxide electrical contact wire material. The preparation method has the beneficial effects that the obtained silver-rare earth refractory metal oxide electrical contact material can replace a toxic silver-cadmium oxide electrical contact material, thus preferably solving the problems of poor material plasticity, and difficulty in processing and temperature rise of theelectrical contact material, and improving the comprehensive properties of the material; and the obtained electrical contact material has the advantages of less silver consumption, lower cost and longer service life.

Description

[0001] technical field [0002] The invention relates to a preparation method of an electrical contact material, in particular to a preparation method of a silver rare refractory metal oxide electrical contact material, and belongs to the technical field of electrical materials. Background technique [0003] The electrical contact in the electrical contact element is one of the key components of the medium and low voltage electrical appliances, and its function is to switch on and off the current. It is not only a carrier fluid, but also a mechanical component. It must have good electrical and thermal conductivity, arc burning resistance, welding resistance, small electrical wear, low and stable contact resistance, no chemical changes with the medium used, and certain Excellent strength and easy machining. At present, the manufacturing materials of electrical contact components are mainly silver-based electrical contact materials, mainly including silver-metal oxides, silver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/16H01B1/02H01B1/08
Inventor 谭雄玉谭光华李跃林曹孝义
Owner 郴州雄风环保科技有限公司
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