A kind of preparation method of silver tin oxide electrical contact material

An electrical contact material, silver tin oxide technology, applied in the direction of contacts, circuits, electrical switches, etc., can solve the problem of uneven distribution of trace additives, and achieve the effect of uniform distribution of components

Active Publication Date: 2011-12-07
ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
View PDF7 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on the above situation, the present invention provides a method for preparing a silver tin oxide electrical contact material, which can avoid the problem of uneven distribution of trace additive components in the material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Take 22.5kg of tin and 5kg of indium, melt them in an intermediate frequency melting furnace, stir, refine at 450-650°C for 10 minutes, completely alloy, raise the temperature to 650-850°C, and atomize them into alloy powders. Oxidation in the furnace, the oxidation process is 2h at 400°C, 2h at 600°C, and 4h at 800°C to obtain tin-indium oxide composite powder. Take 2kg of the composite powder and 18kg of -200 mesh silver powder for mechanical mixing. Mix the powder for 6 hours, press the mixed powder into an ingot at 180MPa, sinter at 880°C for 6 hours, extrude at 820°C to form a wire, and process it into a certain specification of AgSnO by drawing. 2 (10) wire.

Embodiment 2

[0026] Example 2: Take 22.5 kg of tin, 4 kg of indium, and 1 kg of antimony, melt them in an intermediate frequency melting furnace, stir, refine at 700-900°C for 10 minutes, complete alloying, heat up to 900-1100°C, and atomize into alloy powder. The alloy powder is oxidized in an oxidation furnace. The oxidation process is as follows: oxidation temperature 500°C, oxygen pressure 0.3MPa, oxidation 8h, tin indium antimony oxide composite powder, take 2.4kg of the composite powder, take -200 mesh silver powder 17.6kg, carry out Mix the powder mechanically for 6 hours, press the mixed powder into an ingot at 200MPa, sinter at 900°C for 5 hours, extrude at 850°C to form a wire, and process it into a certain specification of AgSnO by drawing. 2 (12) wire rod.

Embodiment 3

[0027] Example 3: Take 22.5kg of tin, 2.25kg of indium, and 2.25kg of bismuth, melt them in an intermediate frequency melting furnace, stir, refine at 500-700°C for 10 minutes, complete alloying, heat up to 700-900°C, and atomize into alloy powder. Oxidize the alloy powder in an oxidation furnace. The oxidation process is as follows: oxidation temperature 500°C, oxygen pressure 0.4MPa, oxidation time 6h, to obtain tin indium bismuth oxide composite powder, take 2.4kg of the composite powder, and take -200 mesh silver powder 17.6kg , mixed powder mechanically, mixed powder for 6 hours, pressed the mixed powder into a 220MPa ingot, sintered at 920°C for 4 hours, extruded at 850°C into a wire, and processed into a certain specification of AgSnO by drawing. 2 (12) wire rod.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for preparing a silver tin oxide electrical contact material, which comprises the following steps of: smelting tin and metal additives in a certain ratio in an intermediate frequency smelting furnace, completely alloying, and atomizing into tin alloy powder; oxidizing the tin alloy powder under certain conditions into tin oxide composite powder; and mechanically mixing the composite powder and silver powder, pressing into ingots, sintering, and pressing to obtain silver tin oxide wires of a certain specification. The prepared silver tin oxide electrical contact material has the characteristics of more uniform distribution of trace additive components, more reasonable composition of metal oxide particles, stable properties and the like; moreover, the production process is simple, and the production process is easy to control.

Description

technical field [0001] The invention relates to the field of metal matrix composite materials, in particular to a preparation method of a silver tin oxide electrical contact material. Background technique [0002] Silver tin oxide electrical contact material is a new generation of non-toxic and environmentally friendly electrical contact material that replaces silver cadmium oxide contact material. It has good resistance to burning and welding, and is widely used in various contactors, relays, and circuit breakers. and switches etc. [0003] In the preparation method of silver tin oxide electrical contact materials, the mechanical powder mixing process is widely used because of its simple process, high production efficiency, low equipment requirements, easy control of the production process, and good product processing performance. [0004] Generally, the mechanical powder mixing process refers to the processing of silver powder, tin oxide powder and additive powder into pr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C22C32/00C22C5/06C22C1/05H01H1/0237
Inventor 黄光临柏小平颜小芳王达武林万焕
Owner ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap