Preparation method of additive-containing silver zinc oxide electrical contact material

An electric contact material, silver zinc oxide technology, applied in the direction of metal/alloy conductors, etc., can solve the problems of segregation and segregation of added elements, clustering of zinc oxide, large density difference, etc., achieve uniform metallographic structure, accelerate oxidation, The effect of improving binding force

Active Publication Date: 2015-05-06
桂林金格电工电子材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the drying process of the composite slurry, the precipitation of added elements on the silver matrix may cause segregation due to the uneven volatilization rate of the liquid. In addition, silver powder containing additives (or zinc oxide powder containing additives) and oxidation The density of zinc powder (or silver powder) is quite different, and the phenomenon of zinc oxide clustering will also appear during the mixing process of the two powders.

Method used

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  • Preparation method of additive-containing silver zinc oxide electrical contact material
  • Preparation method of additive-containing silver zinc oxide electrical contact material
  • Preparation method of additive-containing silver zinc oxide electrical contact material

Examples

Experimental program
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Effect test

Embodiment 1

[0028] 1) First prepare 10kg of Ag-ZnO(11)-In according to 2 o 3 (1.5) The amount of metal indium, silver and zinc required for material ratio calculation, weighing 0.124kg of pure indium block, 0.884kg of pure zinc block for use, and dividing the total amount of silver into two parts, one of which is 3.411kg of pure silver block, another part is the silver nitrate of 8.404kg, takes by weighing for subsequent use, then takes by weighing sodium hydroxide 2.175kg according to the consumption of silver nitrate, for subsequent use;

[0029] 2) Melt the weighed pure indium block, pure zinc 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-zinc-indium alloy powder;

[0030] 3) dissolving silver nitrate in water to form a 20w / w% silver nitrate solution, placing the resulting silver-zi...

Embodiment 2

[0037] 1) First prepare 10kg of Ag-ZnO(11)-Bi according to 2 o 3 (1.5)-CuO (1.0) The consumption of required metal bismuth, copper, silver, zinc of material ratio calculation, take by weighing 0.135kg of pure bismuth block, 0.08kg of pure copper block, 0.884kg of pure zinc block for subsequent use, the total amount of silver Quantity is divided into two parts, wherein a part is the pure silver block of 3.321kg, and another part is the silver nitrate of 8.388kg, takes by weighing for subsequent use, then takes by weighing sodium hydroxide 2.171kg according to the consumption of silver nitrate, for subsequent use;

[0038] 2) Melt the weighed bismuth block, pure copper block, pure zinc 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 the obtained powder slurry The material is dried and passed through a 200-mesh sieve to obtain silver-zinc-bismuth-copp...

Embodiment 3

[0046] 1) First, calculate the amount of metal copper, silver, and zinc required according to the material ratio for preparing 10kg of Ag-ZnO(18)-CuO(0.1), weigh 0.008kg of pure copper block and 1.446kg of pure zinc block for use, and put the silver Total amount is divided into two parts, wherein a part is the pure silver block of 5.777kg, and another part is the silver nitrate of 3.799kg, takes by weighing for subsequent use, then takes by weighing sodium hydroxide 0.983kg according to the consumption of silver nitrate, for subsequent use;

[0047] 2) Melt the weighed pure copper block, pure zinc block and pure silver block in an intermediate frequency melting furnace to form a uniform alloy melt, then atomize it through high-pressure water atomization equipment, and dry the obtained powder slurry , through a 200-mesh sieve to obtain silver-zinc-copper alloy powder;

[0048] 3) dissolving silver nitrate in water to form a 25w / w% silver nitrate solution, placing the resulting ...

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Abstract

The invention discloses a preparation method of an additive-containing silver zinc oxide electrical contact material. The preparation method of the additive-containing silver zinc oxide electrical contact material comprises the following concrete steps: calculating usage amounts of the required metal zinc, metal additives and silver according to a ratio of a to-be-prepared silver zinc oxide electrical contact material, smelting one part of silver in a metallic silver form with the metal zinc and the metal additives, and atomizing to obtain silver-zinc alloyed powder; mixing the other part of silver in a silver nitrate form with the obtained silver-zinc alloyed powder, and then carrying out reaction on the obtained mixture and sodium hydroxide to obtain silver oxide and silver-zinc alloy composite powder; washing the obtained silver oxide and silver-zinc alloy composite powder to be neutral, drying, smashing, and oxidizing in the oxygen-containing atmosphere to obtain additive-containing silver zinc oxide composite powder; and moulding, sintering, repressing and resintering the obtained additive-containing silver zinc oxide composite powder, so that the additive-containing silver zinc oxide electrical contact material is obtained. A contact prepared by adopting the additive-containing silver zinc oxide electrical contact material has the advantages that a metallographic structure is more uniform, and the processability is better.

Description

technical field [0001] The invention relates to a method for preparing an additive-containing silver-zinc oxide electric contact material, belonging to the field of metal matrix composite materials. Background technique [0002] Silver zinc oxide contact material has excellent breaking performance, 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 zinc oxide electrical contact materials added with one or more oxides of bismuth oxide, copper oxide and indium oxide not only have good breaking performance, resistance to welding and arc erosion, Moreover, it can also reduce the contact resistance and temperature rise of the contact material, which greatly improves the electrical performance of the electrical appliance. Generally speaking, there are two main preparation processes ...

Claims

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Application Information

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IPC IPC(8): C22C5/06C22C32/00C22C1/05H01B1/02
Inventor 张天锦李波李耀林王奂然
Owner 桂林金格电工电子材料科技有限公司
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