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Preparation method of tin oxide fiber reinforced silver-based electric contact alloy

A fiber-reinforced, tin oxide technology, used in circuits, electrical switches, electrical components, etc., can solve the problems of temperature rise, large contact resistance, large oxide loss, etc., to reduce bulk resistance, improve conductivity, and improve resistance. The aggressive effect of the arc

Inactive Publication Date: 2016-08-31
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing tin oxide fiber reinforced silver-based electrical contact alloy, which solves the problem of large contact resistance, temperature rise, and large oxide loss in the existing tin oxide particle-reinforced silver-based electrical contact materials during arc erosion improve the arc corrosion resistance of silver-based oxide electrical contact alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Step 1, prepare the tin oxide precursor gel doped with Sb element:

[0038] Weigh SnCl according to the mass-volume ratio of 5g / L 4 ·5H 2 O, and weigh SbCl according to a certain stoichiometric ratio 3 (Atomic ratio of Sn to Sb is 100:1), dissolved in deionized water, weighed at 2 g / L with polyethylene glycol as a dispersant, dissolved in the above obtained solution, and adjusted to pH 1 by dropwise addition of ammonia. The Sb-doped oxide precursor sol is obtained, which is then separated by high-speed centrifugation and washed with distilled water until the filtrate does not contain chloride ions, and finally the Sb-doped tin oxide precursor gel is obtained.

[0039] Step 2, Preparation of SnO doped with Sb element 2 fiber:

[0040] Dissolve polyvinylpyrrolidone (PVP) in absolute ethanol, prepare a PVP / ethanol solution with a concentration of 6% by mass as a fiber forming agent, and add the oxide precursor gel obtained in step 1 at a mass volume ratio of 60 g / L. In ...

Embodiment 2

[0046] Step 1, prepare the tin oxide precursor gel doped with Sb element:

[0047] Weigh SnCl according to the mass ratio of 12g / L 4 ·5H 2 O, and weigh SbCl according to a certain stoichiometric ratio 3 (Atomic ratio of Sn to Sb: 100:10), dissolved in deionized water, weighed at 7 g / L with polyethylene glycol as dispersant, dissolved in the above obtained solution, and adjusted to pH 3.5 by dropwise addition of ammonia to prepare The Sb-doped oxide precursor sol is obtained, which is then separated by high-speed centrifugation and washed with distilled water until the filtrate does not contain chloride ions, and finally the Sb-doped tin oxide precursor gel is obtained.

[0048] Step 2, Preparation of SnO doped with Sb element 2 fiber:

[0049] Dissolve polyvinylpyrrolidone (PVP) in absolute ethanol, prepare a PVP / ethanol solution with a concentration of 8% by mass as a fiber forming agent, and add the oxide precursor gel obtained in step 1 at a mass volume ratio of 85 g / L....

Embodiment 3

[0055] Step 1, prepare the tin oxide precursor gel doped with Sb element:

[0056] Weigh SnCl according to the mass ratio of 15g / L 4 ·5H 2 O, and weigh SbCl according to a certain stoichiometric ratio 3 (Atomic ratio of Sn to Sb: 100:20), dissolved in deionized water, weighed at 10 g / L with polyethylene glycol as dispersant, dissolved in the above obtained solution, and adjusted to pH 5 by dropwise addition of ammonia water to prepare The Sb-doped oxide precursor sol is obtained, which is then separated by high-speed centrifugation and washed with distilled water until the filtrate does not contain chloride ions, and finally the Sb-doped tin oxide precursor gel is obtained.

[0057] Step 2, Preparation of SnO doped with Sb element 2 fiber:

[0058] Dissolve polyvinylpyrrolidone (PVP) in absolute ethanol, prepare a PVP / ethanol solution with a concentration of 10% by mass as a fiber forming agent, and add the oxide precursor gel obtained in step 1 at a mass volume ratio of 1...

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Abstract

The invention provides a preparation method of a tin oxide fiber reinforced silver-based electric contact alloy. The method specifically includes: firstly preparing a Sb element doped tin oxide precursor gel, adding the gel into a fiber forming agent to prepare a spinning solution, and conducting electrostatic spinning to obtain Sb element doped SnO2 fiber; then subjecting the fiber and silver powder to mechanical mixing, and carrying out pressing-sintering-extrusion on a silver-tin oxide fiber mixture by a traditional process, thus obtaining the tin oxide fiber reinforced silver-based electric contact alloy. The method provided by the invention improves the electroconductivity of tin oxide through effective doping of the Sb element, reduces the resistance of a contact alloy body, at the same time enables fibrous distribution of a second phase oxide and reinforcement of the oxide in a silver matrix, solves the problems of large contact resistance, high temperature rise and large oxide loss in traditional oxide particle reinforced silver-based electric contact materials during arc erosion, improves the arc erosion resistance of silver-based oxide electric contact alloy, and also expands the application scope of the silver-based oxide electric contact alloy.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and relates to a method for preparing a tin oxide fiber reinforced silver-based electrical contact alloy. Background technique [0002] AgSnO 2 Electrical contact alloys are commonly used contact materials in low-voltage electrical appliances, and are widely used in various relays and circuit breakers. AgSnO currently used in the market 2 Most of the alloys belong to the second phase oxide particle reinforced silver-based contact material. For example: 1) patent "A preparation method of silver tin oxide electrical contact material" (application number CN201310238015.7, publication number CN103276234A, published on 2013.09.04); 2) patent "a kind of preparation of silver tin oxide composite powder" Method" (application number CN200710070059.8, publication number CN101088680, publication date 2007.12.19); 3) patent "a preparation method of silver tin oxide wire" (application number C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C49/14C22C49/02H01H11/04C22C101/02
CPCH01H11/048C22C49/02C22C49/14
Inventor 付翀张宇慧刘宁仇润红王俊勃侯锦丽贺辛亥徐洁
Owner XI'AN POLYTECHNIC UNIVERSITY
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