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A technology of silver tin oxide and raw materials, which is applied in the field of preparation of silver tin oxide materials, can solve the problems of uneven silver tin oxide structure and insufficient oxide content, and achieve stable mass production, sufficient powder oxidation, and short production cycle Effect
Active Publication Date: 2013-02-13
ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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Problems solved by technology
However, the oxide content in silver tin oxide materials prepared by existing preparation methods is generally not high enough, and the structure of silver tin oxide is not uniform enough
Method used
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Embodiment 1
[0027] Embodiment 1: 8% tin (percentage by weight), 4% indium (percentage by weight), 0.3% lanthanum (percentage by weight), and silver as the balance are used to form raw materials, which are melted by intermediate frequency at 1250°C and atomized The water pressure is 400MPa, the oxygen flow rate is 6L / min for atomization and oxidation, after separate drying and screening, it is pressed into an ingot under an isostatic pressure of 180MPa, sintered at 850°C for 3 hours, and then sintered at 750°C It is extruded into a plate under temperature conditions, and after surface treatment and silver coating, the plate is rolled, punched and formed, and processed into a sheet contact.
Embodiment 2
[0028] Embodiment 2: According to 10% tin (percentage by weight), 2% indium (percentage by weight), 0.3% lanthanum (percentage by weight), 1.0% bismuth, and the balance is silver, the raw materials are composed, and are smelted by intermediate frequency. 1250°C, atomization water pressure 350MPa, oxygen flow rate 4L / min for atomization and oxidation, separate drying and screening, press into ingot under 220MPa isostatic pressure, sintering at 850°C for 9 hours, Then it is extruded into a wire at a temperature of 800°C, and the wire is drawn and annealed to be processed into a finished wire.
Embodiment 3
[0029] Embodiment 3: According to 12% tin (percentage by weight), 5% indium (percentage by weight), 0.6% lanthanum (percentage by weight), 1.5% bismuth, and the balance is silver, the raw materials are composed, and are smelted by intermediate frequency. 1250°C, atomization water pressure 900MPa, oxygen flow rate 7L / min for atomization and oxidation, separate drying and screening, press into ingot under 220MPa isostatic pressure, sintering at 900°C for 12 hours, Then it is extruded into a wire at a temperature of 880°C, and the wire is drawn and annealed to be processed into a finished wire.
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Abstract
The invention provides a method for preparing a silver tin oxide material. The method comprises the following steps: (1) preparing raw materials, wherein the raw materials are base stocks or mixture of the base stocks and additives; (2) performing intermediate frequency smelting on the raw materials, and performing oxidation treatment while water atomization is performed to obtain alloy powder; (3) drying and sieving the alloy powder, and enabling the alloy powder to form an isostatic pressing ingot blank after isostatic pressing; and (4) burning the isostatic pressing ingot blank in a hydrogen heating furnace, performing thermal extrusion on the burnt ingot blank, and extruding panels or wire stocks made of silver tin oxide materials. By means of the method for preparing the silver tin oxide material, oxidization is finished in an atomization process, the oxidization of the powder is full, the tissue is even, and processing performance of the material is improved; the content of oxide in a material system can be improved to 20%, and using requirements of large-current electrical equipment are met; and the preparation method of the material is free of environment pollution, the technological process is easy to control, the production period is short, and stable large-volume production can be achieved.
Description
technical field [0001] The invention belongs to the field of manufacturing metal matrix composite materials, and in particular relates to a method for preparing a silver tin oxide material. Background technique [0002] At present, the preparation methods of known silver tin oxide materials mainly contain the following types: [0003] 1. Through intermediate frequency melting and casting of silver, tin and indium blocks, surface treatment, hot extrusion, wire drawing, wire oxidation, cutting, ingot pressing, extrusion, wire drawing to finished products. [0004] 2. Through intermediate frequency smelting of silver and tin nuggets, water atomization, powder oxidation, isostatic pressing, sintering, extrusion, rolling or wire drawing, the silver tin oxide material is made. [0005] 3. Silver tin oxide material is made by mixing silver powder and tin oxide powder, isostatic pressing, sintering, extrusion, rolling or wire drawing. [0006] 4. Using silver oxide as a reactant b...
Claims
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