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Preparing method for silver tin oxide indium oxide contact material uniform in structure

A technology of silver tin oxide and contact materials, which is applied in the direction of contacts, electrical components, circuits, etc., can solve the problems of uneven diffusion path length, material structure, and large size gap, and achieve the reduction of diffusion path gap and diffusion consistency Good results

Pending Publication Date: 2020-04-17
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

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Problems solved by technology

However, the applicant found through analysis that the shape of the material entering the oxidation process in patents 1 and 2 is a sheet or a strip, and the size difference between the length and thickness of the material is large, while the shape of the material in patents 3 and 4 is short. However, the length-to-diameter ratio is also very different. When the material is internally oxidized, oxygen diffuses from the surface of the material to the inside of the material. Due to the large gap in the length of the diffusion path of oxygen, there are oxide-poor areas and material structures in the final product. uneven

Method used

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  • Preparing method for silver tin oxide indium oxide contact material uniform in structure
  • Preparing method for silver tin oxide indium oxide contact material uniform in structure
  • Preparing method for silver tin oxide indium oxide contact material uniform in structure

Examples

Experimental program
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Effect test

Embodiment 1

[0030] According to the mass ratio of Ag:Sn:In:Te=91.2:5.5:3:0.3, silver ingots, tin ingots, indium ingots and tellurium ingots are weighed and melted and cast into ingots. The specifications of the ingots are obtained after peeling ingot; then extrude the ingot into a specification of wire, and then draw the wire to a specification of Alloy wire rod, using cold heading machine to process the alloy wire rod into spherical particles; the spherical particles were placed in a hydrogen atmosphere at 500 ° C for 2 hours, and then in an oxygen atmosphere with an oxygen partial pressure of 0.5 MPa, at 720 ° C for 24 hours to obtain oxidized particles The obtained oxidized particles were placed in an environment with a vacuum degree of 0.1 Pa and a temperature of 650° C. for 2 hours, and the resulting vacuum-treated particles were molded to obtain a specification of ingot, and then extruded into a specification of The wire is further drawn into a specification of of wire....

Embodiment 2

[0035]According to the mass ratio of Ag:Sn:In:Bi=89.5:7:3.2:0.3, silver ingots, tin ingots, indium ingots and bismuth blocks are weighed and melted and cast into ingots. The specifications of the ingots are obtained after peeling ingot; then extrude the ingot into a specification of wire, and then draw the wire to a specification of Alloy wire rod, using cold heading machine to process the alloy wire rod into spherical particles; the spherical particles were placed in a hydrogen atmosphere at 600 ° C for 2 hours, and then in an oxygen atmosphere with an oxygen partial pressure of 0.3 MPa, at 750 ° C for 28 hours to obtain oxidized particles The obtained oxidized particles were placed in an environment with a vacuum degree of 0.1 Pa and a temperature of 650° C. for 2 hours, and the resulting vacuum-treated particles were molded to obtain a specification of ingot, and then extruded into a specification of The wire is further drawn and cold heading processed into a spe...

Embodiment 3

[0041] Weigh silver ingots, tin ingots and indium ingots according to the mass ratio of Ag:Sn:In=89.8:8:2.2 to melt and cast ingots. The specifications of the ingots are obtained after peeling ingot; then extrude the ingot into a specification of wire, and then draw the wire to a specification of Alloy wire rod, using cold heading machine to process the alloy wire rod into spherical particles; the spherical particles were placed in a hydrogen atmosphere at 400 ° C for 3 hours, and then in an oxygen-containing atmosphere with an oxygen partial pressure of 0.1 MPa, at 780 ° C for 25 hours to obtain oxidized particles The obtained oxidized particles were placed in an environment with a vacuum degree of 0.1 Pa and a temperature of 700° C. for 2 hours, and the resulting vacuum-treated particles were molded to obtain a specification of ingot, and then extruded into a specification of The wire is further drawn into a specification of of wire. The metallographic structur...

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Abstract

The invention discloses a preparing method for a silver tin oxide indium oxide contact material uniform in structure. The preparing method comprises the following steps that firstly, the usage amountof a needed silver ingot, a needed tin ingot, a needed indium ingot and a needed additive is calculated according to the material proportion of a silver tin oxide indium oxide contact needing to be prepared, and weighing is conducted for later usage; secondly, the silver ingot, the tin ingot and the indium ingot are taken, the additive is added or not added, smelting and casting are conducted, andan alloy cast ingot is obtained; thirdly, the cast ingot is extruded and drawn into an alloy wire; fourthly, the alloy wire is machined into spherical or sphere-like particles; fifthly, the sphericalor sphere-like particles are arranged in the reducing atmosphere to be subjected to reducing treatment and then arranged in the oxygen atmosphere to be oxidized, and oxidized particles are obtained;sixthly, the oxidized particles are arranged in the vacuum atmosphere to be subjected to vacuum treatment; and seventhly, the particles obtained after vacuum treatment are formed and then machined into a finished wire or strip. According to the preparing method, the alloy material is machined into the spherical or sphere-like particles, then internal oxidization is conducted, and the silver tin oxide indium oxide contact material uniform in structure is more easily obtained.

Description

technical field [0001] The invention relates to a preparation method of a silver tin oxide indium oxide contact material, in particular to a preparation method of a uniform silver tin oxide indium oxide contact material. Background technique [0002] Numerous studies have shown that silver tin oxide material is the most promising environmental protection contact material to replace silver cadmium oxide, and has a good application prospect. Silver tin oxide and indium oxide materials are an important branch of silver tin oxide series materials, which are usually prepared by internal oxidation process. In internal oxidation products, structural defects such as poor oxide defects or oxide aggregation are typical defects that lead to product failure during commercial production. Relevant scientific research institutes and material manufacturers have also carried out related research work on this problem, expecting to improve the process of internal oxidation method, solve the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C1/02C22C5/06C22C32/00H01H1/0237
CPCC22C1/1036C22C1/1078C22C5/06C22C32/0021H01H1/02376
Inventor 陈光明黄锡文罗春华李波黄兴隆
Owner 桂林金格电工电子材料科技有限公司
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