Silver base rare earth alloy contact material for low-voltage switch electric appliance and method for preparing same

A low-voltage switch, rare earth alloy technology, applied in contact materials, electrical switches, circuits, etc., can solve problems such as poor switch operating characteristics, and achieve the effects of low contact temperature rise, strong anti-welding ability, and extended service life.

Inactive Publication Date: 2005-06-29
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent is not a silver-metal oxide contact material, the switch operating characteristics are poor

Method used

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  • Silver base rare earth alloy contact material for low-voltage switch electric appliance and method for preparing same
  • Silver base rare earth alloy contact material for low-voltage switch electric appliance and method for preparing same
  • Silver base rare earth alloy contact material for low-voltage switch electric appliance and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First, the Ag chips, La chips, Sn chips and Bi chips are mixed according to the proportion of ingredients, and then HNO is added after mixing them evenly. 3 until all dissolved to obtain a mixed solution, and then add solid Na as a coprecipitant 2 CO 3 , control PH=8~9, make the mixed solution with SnO 2 Co-precipitation occurs with particles as the core until SnO is obtained. 2 Uniformly dispersed Ag with particle as the core 2 CO 3 , La 2 (CO 3 ) 3 and Bi 2 (CO 3 ) 3 Until the coprecipitate was completely precipitated, the coprecipitate was filtered with deionized water, washed, dried, and then calcined at 420 °C to obtain Ag / La 2 O 3 +SnO 2 +Bi 2 O 3 the composite powder, and then the obtained Ag / La 2 O 3 +SnO 2 +Bi 2 O 3 The composite powder is processed into a compact with the required shape and size by ordinary molding method. At this time, the total pressing pressure is 30 tons, and then the compact is solid-phase sintered at a sintering temper...

Embodiment 2

[0029] First, the Ag shavings, Ce shavings, Sn shavings and Bi shavings are prepared according to the composition ratio, and then HNO is added after mixing evenly. 3 until all dissolved to obtain a mixed solution, and then add solid Na as a coprecipitant 2 CO 3 , control PH=8~9, make the mixed solution with SnO 2 The particles are the core and co-precipitation occurs until a uniformly dispersed Ag is obtained 2 CO 3 , Ce 2 (CO 3 ) 3 and Bi 2 (CO 3 ) 3 Until the coprecipitate was completely precipitated, the coprecipitate was filtered with deionized water, washed, dried, and then calcined at 420 ° C to obtain Ag / Ce 2 O 3 +SnO 2 +Bi 2 O 3 the composite powder, and then the obtained Ag / Ce 2 O 3 +SnO 2 +Bi 2 O 3 The composite powder is processed into a compact with the required shape and size by ordinary molding method. At this time, the total pressing pressure is 30 tons, and then the compact is solid-phase sintered at a sintering temperature of 920 ℃, and final...

Embodiment 3

[0032] First, the Ag scraps, Pr scraps, Sn scraps and In scraps are proportioned according to the composition ratio, and then HNO is added after mixing evenly. 3 until all dissolved to obtain a mixed solution, and then add solid Na as a coprecipitant 2 CO 3 , control PH=8~9, make the mixed solution with SnO 2 Co-precipitation occurs with particles as the core until SnO is obtained. 2 Uniformly dispersed Ag with particle as the core 2 CO 3 , Pr 2 (CO 3 ) 3 and In 2 (CO 3 ) 3 Until the coprecipitate was completely precipitated, the coprecipitate was filtered with deionized water, washed, dried, and then calcined at 420 °C to obtain Ag / Pr 2 O 3 +SnO 2 +In 2 O 3 The composite powder of , and then the obtained Ag / Pr 2 O 3 +SnO 2 +In 2 O 3 The composite powder is processed into a compact with the required shape and size by ordinary molding method. At this time, the total pressing pressure is 30 tons, and then the compact is solid-phase sintered at a sintering temp...

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Abstract

This invention relates to a silver-based rare earth alloy touch material used in low voltage switch appliance and its process method. Its chemical components are the following: rare earth metal oxide xú¢1í½7 úÑ; Me oxide yú¢1í½3 úÑ; SnO#-[2] zú¢(12-x-y)úÑ; the rest is metal silver, wherein the rare earth metals are LaíóCeíóPr or Nd and Me as BiíóIníóSb or T1. Its process method is as following: to use chemical co-precipitation to make powder and to shape and sinter the deposited powder.

Description

technical field [0001] The technical scheme of the present invention relates to electrical switch contacts distinguished by the materials used, specifically silver-based rare earth alloy electrical switch contact materials. Background technique [0002] The advanced nature of low-voltage switchgear is mainly marked by its high reliability and long working life. The contacts of switching appliances, especially the contact materials, are the key to ensure their high reliability and long life. Silver-metal oxide contact materials have excellent switching performance, and thus become a class of contact materials widely used in low-voltage electrical appliances. The electrical contact is the component that directly connects and breaks the circuit in the switchgear, and it plays a decisive role in the safe operation of the switchgear. With the rapid development of modern industry, the load of high-voltage power transmission network is increasing day by day, and the level of auto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/00C22C1/04C22C5/06H01H1/02H01H11/04
Inventor 王景芹温鸣王海涛陆俭国赵靖英王宝珠张云峰
Owner HEBEI UNIV OF TECH
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