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A kind of preparation method of silver tin oxide material

A technology of silver tin oxide and benzoyl peroxide, which is applied in the field of preparation of silver tin oxide materials, can solve the problems of easy introduction of impurities, decreased alloy processing performance and service performance, etc., so as to improve surface activity, uniform particles, and reduce agglomeration. Effect

Active Publication Date: 2019-05-17
深圳市英诺泰克科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention: In view of the current method of chemical powder mixing, although the dispersion of oxides is good, it is easy to introduce impurities, which will cause the processing performance and service performance of the alloy to decline. The present invention provides a A kind of preparation method of silver tin oxide material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The preparation method of silver tin oxide of the present invention, comprises the steps:

[0023] (1) In parts by weight, take 100-150 parts of distilled water, 60-80 parts of styrene, 45-50 parts of vinyl acetate, 40-50 parts of 1mol / L sodium stannate solution, 30 parts of 1.5mol / L silver nitrate ~40 parts, 5~10 parts of benzoyl peroxide, 4~7 parts of maleic anhydride, 2~3 parts of crosslinking agent, 1~4 parts of porogen, 2~5 parts of sodium lauryl sulfate, catalyst 1 to 4 copies;

[0024] (2) Add benzoyl peroxide and water into the reactor, raise the temperature to 50-60°C, heat and stir for 2-3 hours, then pass in argon protection, cool down to 20-25°C, add styrene, vinyl acetate ester, maleic anhydride, cross-linking agent, porogen, sodium lauryl sulfate, and then dropwise add 1.5mol / L silver nitrate solution at a rate of 1-2 drops per second. After the dropwise addition, heat up to 80 ~90℃, constant temperature reaction 5~6h;

[0025] (3) After the reaction, c...

Embodiment 1

[0028] Choice of crosslinking agent: Vinyltriethoxysilane.

[0029] Choice of porogen: Polyurethane.

[0030] Catalyst of choice: acetic acid.

[0031] The preparation method of silver tin oxide of the present invention, comprises the steps:

[0032] (1) In parts by weight, take 100 parts of distilled water, 60 parts of styrene, 45 parts of vinyl acetate, 40 parts of 1mol / L sodium stannate solution, 30 parts of 1.5mol / L silver nitrate, 5 parts of benzoyl peroxide Parts, 4 parts of maleic anhydride, 2 parts of crosslinking agent, 1 part of porogen, 2 parts of sodium lauryl sulfate, 1 part of catalyst;

[0033] (2) Add benzoyl peroxide and water into the reactor, heat up to 50°C, heat and stir for 2 hours, then pass through argon protection, cool down to 20°C, add styrene, vinyl acetate, maleic anhydride, Cross-linking agent, porogen, sodium lauryl sulfate, and then add 1.5 mol / L silver nitrate solution dropwise at a rate of 1 drop per second. After the dropwise addition, rai...

Embodiment 2

[0037] Choice of crosslinking agent: di-tert-butyl peroxide.

[0038] Choice of porogen: Polyurethane.

[0039] Catalyst of choice: formic acid.

[0040] The preparation method of silver tin oxide of the present invention, comprises the steps:

[0041] (1) In parts by weight, take 125 parts of distilled water, 70 parts of styrene, 47 parts of vinyl acetate, 45 parts of 1mol / L sodium stannate solution, 35 parts of 1.5mol / L silver nitrate, and 7 parts of benzoyl peroxide Parts, 5 parts of maleic anhydride, 2 parts of crosslinking agent, 3 parts of porogen, 4 parts of sodium lauryl sulfate, 3 parts of catalyst;

[0042] (2) Add benzoyl peroxide and water into the reactor, heat up to 55°C, heat and stir for 2 hours, then pass through argon protection, cool down to 24°C, add styrene, vinyl acetate, maleic anhydride, Cross-linking agent, porogen, sodium lauryl sulfate, and then dropwise add 1.5mol / L silver nitrate solution at a rate of 1 drop per second. After the dropwise additi...

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Abstract

The invention belongs to the field of metal-based material preparation, and particularly relates to a preparation method of a silver tin oxide material. The preparation method comprises the steps that styrene and benzoyl peroxide are taken as monomers and modified by adding maleic anhydride to form macroporous resin, silver ions in silver nitrate are wrapped in the macroporous resin, polar groups in silver nitrate are replaced with acid group ions in a sodium stannate solution, and after a catalyst is added, tin ions and the silver ions form co-precipitation. Separation and purification are achieved through the selectivity of a compound of the resin. Under the action of the macroporous resin, the dispersity of silver and tin mixed particles can be improved, agglomeration of the particles can be reduced, and the particles can be more uniform. The surface activity of the particles is improved, other components can be conveniently loaded on the surfaces of the particles, and therefore the problems that the machining performance and the using performance of alloy are likely to be reduced due to the fact that by adopting a chemical powder mixing machining method at preset, impurities are liable to be introduced although the dispersity of oxides is good are solved.

Description

technical field [0001] The invention belongs to the field of metal base material manufacture, and in particular relates to a preparation method of silver tin oxide material. Background technique [0002] Silver tin oxide material is a contact material commonly used in low-voltage electrical appliances. Because of its good welding resistance and electrical corrosion resistance, it has successfully replaced silver cadmium oxide material and is currently widely used in various relays and circuit breakers. [0003] At present, there are three main methods for preparing silver tin oxide electrical contact materials at home and abroad: powder mixing method, internal oxidation method, and chemical method. The mixed powder method is to mix silver powder and tin oxide powder mechanically in a powder mixer, and then prepare silver tin oxide wire or sheet by powder metallurgy. This method is simple in process, but requires the raw material powder to be very fine in size. To obtain a u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/06C22C32/00C22C1/05C22C1/10B22F9/24
CPCB22F9/24C22C1/05C22C5/06C22C32/0021
Inventor 徐啸飞丁明红尹凯欣
Owner 深圳市英诺泰克科技有限公司