Nano core-shell type copper-nickel bimetal powder body and preparing method and application thereof

A nano-core-shell and bimetallic technology, applied in the direction of coating, etc., can solve the problems of simple nano-copper powder being easily oxidized and not easily oxidized, and achieve significant social benefits, friction reduction, energy saving, and excellent performance.

Active Publication Date: 2008-07-02
HAILIAN INST OF LUBRICATING MATERIALS SHANGHAI
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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 by 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-nickel bimetallic powder that is not easily oxidized

Method used

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  • Nano core-shell type copper-nickel bimetal powder body and preparing method and application thereof
  • Nano core-shell type copper-nickel bimetal powder body and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First, 4 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 100 ml of water;

[0025] Polymer protection agent PVP content is 16g / L, nickel sulfate hexahydrate content is 13.3g / L (theoretical content of nickel in powder is 10%), copper complexing agent thiourea content is 120ml of the mixed solution of 67g / L, Mix it with the copper powder suspension at 80 degrees with stirring. The reaction time is 15 minutes, and the reaction product is filtered, washed and dried. The so-called core-shell copper-nickel bimetal nanopowder can be obtained.

[0026] Depend on figure 1 , 2 The comparison shows that spherical or near-nano-spherical copper-nickel bimetallic powder can be prepared by using nano-spherical copper powder as raw material, and the particles of the latter are sligh...

Embodiment 2

[0028] Prepare 4g of nano-spherical copper powder with reference to Example 1, and add 100ml of water to the copper powder to stir and disperse evenly; another polymer protective agent PVP content is 16g / L, copper complexing agent thiourea content is 67g / L, sulfuric acid hexahydrate 120ml of a mixed solution with a nickel content of 20g / L (the theoretical content of nickel in the powder is 15%) is mixed with the copper powder suspension under stirring at 80°C. The reaction time is 15 minutes, and the reaction product is filtered, washed and dried. The so-called core-shell copper-nickel bimetal nanopowder can be obtained.

[0029] The particle size of the prepared powder was tested by a laser particle size analyzer, and the average particle size of the particles was 70nm. The particles are clad structures.

Embodiment 3

[0031] Referring to Example 1, prepare 4 g of nano-spherical copper powder, and add 100 ml of water to the copper powder to stir and disperse evenly; another polymer protective agent PVP content is 16 g / L, copper complexing agent thiourea content is 67 g / L, sulfuric acid hexahydrate Nickel content is 26.6g / L (theoretical content of nickel in powder is 20%) mixed solution 120ml, under the condition of stirring at 80 ℃, it is mixed with copper powder suspension. The reaction time is 20 minutes, and the reaction product is filtered, washed and dried. The so-called nano-core-shell copper-nickel bimetallic powder can be obtained.

[0032] The particle size of the prepared powder was tested by a laser particle size analyzer, and the average particle size of the particles was 60nm. The particles are clad structures.

[0033] The same method can produce nano-copper-nickel powder with nickel content of 30%, 40%, etc. in the powder

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Abstract

The invention relates to a bimetal powder of copper and nickel and a preparation method thereof. The invention solves the defect of easy oxidation of the simple substance nanometer copper powder and improves the use effect of the ordinary copper nickel composite powder. Referring to the prior art, the invention firstly prepares a nanometer copper powder, the copper powder is stirred and dispersed homogeneously in the water, and suspension liquid of the copper powder is prepared; the suspension liquid of the copper powder is blended with the nickel sulfate solution comprising macromolecule protective agent and special copper coordination agent thiourea so as to cause a replacement reaction between nickel ion and the copper; surfaces of the ultrafine copper particles are partly or all coated with the nickel, thus forming the core-shell copper-nickel bimetal nanometer powder. The bimetal powder can be taken as lubricant, lubricating grease extreme pressure-antiwear additives, additives in powder metallurgy, or as porous materials, antibacterial materials, antifouling coatings, conductive materials, magnetic materials, self-lubricating materials, antifriction materials, diamond tools, and raw materials or additives of electrical carbon products.

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 nickel and its preparation method and application. 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 literature [Trenie Iznos, 20 (3), 333-338 (Russian) 1999], it is reported that Russian scientists added nano-copper powder to lubricating oil and found that the lubricating performance was significantly improved, the mechanical wear was reduced by 3-3.5 times and the friction The load was doubled and the tribological properties of the lubricating oil were good. However, elemental nano-copper is ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F1/02B22F9/06
Inventor 赵斌王鹏
Owner HAILIAN INST OF LUBRICATING MATERIALS SHANGHAI
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