Nano hud-type bimetal powder of copper and stannum, preparing method and application

A nano-core-shell, bimetallic technology, applied in botanical equipment and methods, applications, biocides, etc., can solve the problems of elemental nano-copper powder being easily oxidized but not easily oxidized, etc., achieving significant social benefits, friction reduction and energy saving , Excellent anti-wear effect

Inactive Publication Date: 2004-10-27
SHANGHAI WEILAI NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the technical problems to be solved in the present invention is to solve the problem that simple nano-copper powder is easily oxidized in the air, and provide a nano-core-shell copper-tin bimetallic powder that is not easily oxidized

Method used

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  • Nano hud-type bimetal powder of copper and stannum, preparing method and application
  • Nano hud-type bimetal powder of copper and stannum, preparing method and application
  • Nano hud-type bimetal powder of copper and stannum, preparing method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First, 2 grams of nano-spherical copper powder was prepared by using the technology reported by Liu Zhijie, Zhao Bin, etc. on pages 55-58 of the 10th issue of the document "Chemical Bulletin" in 1996, and the copper powder was stirred and dispersed evenly with 50 ml of water;

[0023] Polymer protection agent PVP content is 20g / L, tin protochloride dihydrate content is 7g / L, copper complexing agent thiourea content is 50ml of the mixed solution of 60g / L, under the condition of stirring at room temperature, it is mixed with copper Mix the powder suspension. The reaction time is 10 minutes, and the reaction product is filtered, washed and dried. The so-called core-shell copper-tin bimetal nanopowder can be obtained.

[0024] The copper content is 90% and the tin content is 10% as measured by gravimetric analysis.

[0025] Depend on figure 1 , 2 The comparison shows that spherical or nearly nano-spherical copper-tin bimetallic powder can be prepared by using nano-spher...

Embodiment 2

[0028] Adopt existing technology to prepare 2 grams of irregular polygonal copper powders with hydrazine hydrate as a reducing agent, and add 50 ml of water to the copper powders and stir to disperse evenly;

[0029] Polymer protection agent PVP content is 20g / L, tin protochloride dihydrate content is 7g / L, copper complexing agent thiourea content is 50ml of the mixed solution of 60g / L, under the condition of stirring at room temperature, it is mixed with copper Mix the powder suspension. The reaction time is 15 minutes, and the reaction product is filtered, washed and dried. The so-called core-shell copper-tin bimetal nanopowder can be obtained.

[0030] The copper content is 90% and the tin content is 10% as measured by gravimetric analysis.

[0031] The morphology of the prepared powder was observed by transmission electron microscope as irregular polygon. This shows that the shape of the raw copper powder determines the shape of the copper-tin powder.

Embodiment 3

[0033] Referring to Example 1, 2 g of nano-spherical copper powder was prepared and made into 50 ml of a suspension.

[0034] Polymer protective agent PVP content is 20g / L, tin protochloride dihydrate content is 17g / L, copper complexing agent thiourea content is 50ml of the mixed solution of 80g / L, under the condition of 60 ℃, stirring it and Copper powder suspension mixed. The reaction time is 10 minutes, and the reaction product is filtered, washed and dried. The so-called core-shell copper-tin bimetal nanopowder can be obtained.

[0035] The copper content is 81% and the tin content is 19% as determined by gravimetric analysis.

[0036] Observed by transmission electron microscope, the prepared powder has a spherical or nearly spherical shape, a single particle size of 50-100nm, and a completely coated structure.

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Abstract

A process for preparing the core-shell Cu-Sn nanoparticles includes preparing Cu nanoparticles, dispersing in water, mixing with the solution of stannous chloride under existence of high-molecular protecting agent and thiourea, and displacement reaction to generate a Sn layer on the surface of Cu nanoparticle. It can be used as the additive of extreme-pressure lubricant, powder metallurgy, and different special materials.

Description

technical field [0001] The invention belongs to the technical field of bimetallic powder and its preparation and application, and in particular relates to a bimetallic powder of copper and tin and a preparation method thereof. The bimetallic powder can be used as an extreme pressure anti-wear additive for lubricating oil and lubricating grease , as an additive in powder metallurgy, or as a raw material or additive for porous materials, antibacterial materials, antifouling coatings, conductive materials, self-lubricating materials, antifriction materials, diamond tools, and electric carbon products. technical background [0002] Due to the unique physical and chemical properties that many traditional materials do not have, nanopowders have been widely valued and become one of the hot research topics at home and abroad. The application of nanomaterials in lubricating oil is a very promising multidisciplinary research field. According to the liter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/20B22F1/02C09C1/66
Inventor 赵斌牟国俊
Owner SHANGHAI WEILAI NEW MATERIALS CO LTD
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