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Processing method of silver tin oxide electrical contact material containing additives

An electrical contact material, silver tin oxide technology, applied in the direction of contacts, circuits, electrical switches, etc., can solve the problems of additive aggregation, etc., and achieve the effect of uniform metallographic structure

Active Publication Date: 2015-04-08
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

However, this method has the disadvantage of prone to additive aggregation

Method used

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  • Processing method of silver tin oxide electrical contact material containing additives
  • Processing method of silver tin oxide electrical contact material containing additives
  • Processing method of silver tin oxide electrical contact material containing additives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) First prepare 10kg Ag-SnO according to 2 (11)-In 2 o 3 (1.5) The amount of metal indium, silver and tin required for material ratio calculation, weighing 0.012kg of pure indium block, 0.866kg of pure tin block for use, and dividing the total amount of silver into two parts, one part is 4.896kg of pure silver block, another part is the silver nitrate of 6.066kg, takes by weighing for subsequent use, then takes by weighing sodium hydroxide 1.57kg according to the consumption of silver nitrate, for subsequent use;

[0030] 2) Melt the weighed pure indium block, pure tin block and pure silver block in an intermediate frequency melting furnace to form a uniform alloy melt, and then atomize it through high-pressure water atomization equipment, and dry the obtained powder slurry , through a 200-mesh sieve to obtain silver-tin-indium alloy powder;

[0031] 3) dissolving silver nitrate in water to form a 40w / w% silver nitrate solution, placing the resulting silver-tin-indi...

Embodiment 2

[0038] 1) First prepare 10kg Ag-SnO according to 2 (11)-Bi 2 o 3 (1.5)-CuO (1.0) The consumption of required metal bismuth, copper, silver, tin of material ratio calculation, take by weighing pure bismuth block 0.013kg, pure copper block 0.008kg, pure tin block 0.866kg standby, the total amount of silver Quantity is divided into two parts, wherein a part is the pure silver block of 4.887kg, and another part is the silver nitrate of 5.923kg, takes by weighing for subsequent use, then takes by weighing sodium hydroxide 1.533kg according to the consumption of silver nitrate, for subsequent use;

[0039] 2) Place the weighed bismuth block, pure copper block, pure tin block and pure silver block in an intermediate frequency melting furnace to melt into a uniform alloy melt, and then atomize it through a high-pressure water atomization equipment, and the obtained powder slurry The material is dried and passed through a 200-mesh sieve to obtain silver-tin-bismuth-copper alloy powde...

Embodiment 3

[0047] 1) First prepare 10kg Ag-SnO according to 2 (18)-CuO (0.1) The consumption of required metal copper, silver, tin of material ratio calculation, take by weighing pure copper block 0.008kg, pure tin block 1.417kg standby, the total amount of silver is divided into two parts, wherein a part is 5.66kg of pure silver block, the other part is 3.982kg of silver nitrate, take by weighing for later use, then take by weighing 1.031kg of sodium hydroxide according to the consumption of silver nitrate, for later use;

[0048] 2) Place the weighed pure copper block, pure tin block and pure silver block in an intermediate frequency smelting furnace to melt into a uniform alloy melt, and then atomize through high-pressure water atomization equipment, and dry the obtained powder slurry , through a 200-mesh sieve to obtain silver-tin-copper alloy powder;

[0049] 3) dissolving silver nitrate in water to form a 25w / w% silver nitrate solution, placing the resulting silver-tin-copper allo...

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Abstract

The invention discloses a processing method of a silver tin oxide electrical contact material containing additives. The processing method specifically comprises the following steps: calculating the use level of metal tin, metal additives and silver required according to the material ratio of a silver tin oxide electrical contact required to be prepared, and smelting and atomizing one part with the metal tin and metal additives together in form of metal silver to prepare silver tin alloy powder; after mixing the other part with the prepared silver tin alloy powder in form of silver nitrate, carrying out reaction with sodium hydroxide to obtain composite powder of silver oxide and silver tin alloy; washing the obtained composite powder to be neutral, drying and crushing and putting in an oxygen atmosphere to be oxidized to obtain silver tin oxide composite powder containing the additives; and carrying out isostatic compaction and sintering on the composite powder, carrying out hot extrusion on a silver zinc oxide billet to process a strip or a wire rod, and then machining to obtain the silver tin oxide electrical contact material containing additives. The contact prepared by the method is uniform in metallographic structure and good in processing performance.

Description

technical field [0001] The invention relates to a processing method for an additive-containing silver tin oxide electric contact material, belonging to the field of metal matrix composite materials. Background technique [0002] In recent years, silver tin oxide contacts have been widely used in various low-voltage electrical appliances as the best substitute for toxic silver cadmium oxide contacts. Silver tin oxide contact material has excellent wear resistance, welding resistance and arc erosion resistance, but it has disadvantages such as large contact resistance and temperature rise, which seriously affect the electrical performance of electrical appliances. [0003] Previous studies have found that silver tin oxide electrical contact materials added with one or more oxides of bismuth oxide, copper oxide and indium oxide not only have good wear resistance, welding resistance and arc erosion resistance , which greatly improves the electrical performance of electrical app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/06C22C1/10H01H1/0237H01H11/04
Inventor 张天锦叶凡黄锡文李波蒙建洲
Owner 桂林金格电工电子材料科技有限公司
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