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Nano silver-tin oxide electric contact and its prepn

A silver tin oxide and tin oxide technology, applied in contact materials, metal/alloy conductors, etc., can solve the problems of difficult drawing, temperature rise, high contact resistance, etc., to improve thermal stability and arc resistance. Erosion and oxidation resistance, the effect of simple processing

Inactive Publication Date: 2003-05-14
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silver tin oxide contact is currently a research hotspot in the domestic low-voltage electrical industry. However, because it is not easy to be drawn into shape, the contact resistance is relatively large during use, and the temperature rises, which has become a research difficulty.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment one: (1) with SnCl 4 and TiCl 4 , according to the weight ratio: 8:2 ratio, take SnCl 4 20 g TiCl 4 5 gram scale

[0014] Take it, put it into a beaker, add 20ml of 30% ethanol aqueous solution, and add to the solution at the same time

[0015] 0.5 g of triethanolamine dispersant and 40 ml of ammonia water with a dropwise concentration of (1 mol), react at 40 to 60 ° C

[0016] It should be reacted until the solution is pH=7, and the product is filtered and roasted at 200-700°C for 2-3 hours.

[0017] 8 grams of nano-tin oxide powder doped with titanium oxide having a particle diameter of 20 nm was obtained. (2) Silver powder, nano-tin oxide and cerium oxide powder are weighed 88 grams of silver powder in a weight ratio of 88:10:2.

[0018] 10 grams of nano-tin oxide and 2 grams of cerium oxide were mixed in a mixing tank for 7 to 10 hours. mixed powder in

[0019] At a temperature of 20-30°C, press molding at 250MPa, and sinter at 800°C for 10 hours....

Embodiment 2

[0025] Embodiment two: 1) with SnCl 4 and TiCl 4 , according to the weight ratio: 9:1 scale SnCl 4 27 g and TiCl 4 , 3

[0026] gram, put it into a beaker, add concentration and be 30% ethanol aqueous solution 30ml, add to solution simultaneously

[0027] Add 0.7 g of triethanolamine dispersant and dropwise add 40 mL of ammonia water with a concentration of (1 mol), at 40-60 °C

[0028] React until the solution is pH=7, and the product is filtered and roasted at 200-700°C for 2-3 hours

[0029] 10 grams of nano-tin oxide powder doped with titanium oxide with a particle size of 20 nm was obtained. (4) silver powder, nano-tin oxide and cerium oxide powder in a weight ratio of 88:10:2, 44 grams of silver powder, nano

[0030] Mix 5 grams of tin oxide and 1 gram of cerium oxide powder in a mixing tank for 7 to 10 hours. mixed powder in

[0031] At a temperature of 20-30°C, press molding at 250MPa, and sinter at 800°C for 10 hours. (5) Extrude the sintered material at 700°...

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PUM

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Abstract

The present invention belongs to metal-based composite material technology. The electric contact material consists of Ag 70-97 wt%, nanometer tin oxide 3-22 wt% and RE elements 0.1-8 wt%. The electric contact is produced through the processes of preparation of zine oxide or titanium oxide doped nanometer tin oxide, mixing metal oxide powder, pressing the mixture to form, sintering, extruding, drawing wire and forming into rivet type or stripe contact. The pressure in pressing the mixture to form is 150-400 MPa and the sintering temperature is 800-900 deg.c. The electric contact can be used inelectric appliance, instrument and switch.

Description

technical field [0001] The invention relates to an electrical contact of nano silver tin oxide and a preparation method thereof. The invention belongs to the technical field of metal matrix composite materials. Background technique [0002] Electrical contacts are key components of electrical switches, instruments, etc., in contactors, relays and small power circuit breakers. For a long time, Ag-CdO contacts have been widely used at home and abroad. It has the advantages of good arc extinguishing performance and stable contact resistance. It is exposed that its anti-melting performance is poor, the arc burns seriously, and cadmium poisoning is unavoidable in the use process, causing environmental pollution and other deficiencies. Silver tin oxide contact material is a new type of non-toxic electrical contact material that has developed rapidly in recent years. It has good thermal stability, arc erosion resistance and welding resistance, and its app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/06H01B1/02H01H1/02
Inventor 郑冀高后秀李松林李玉桐李群英
Owner TIANJIN UNIV
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