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.
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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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