Method for mfg nano copper powder

A copper powder and nano-level technology, applied in the field of metal powder preparation, can solve the problems such as unreported production methods of ultra-fine nano-copper powder, and achieve the effects of saving precipitation time, rapidly precipitation of nanoparticles, and simple equipment.

Inactive Publication Date: 2004-03-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] According to the relevant literature retrieval and analysis in the past 15 years, the industrial production method of ultra-fine nano-tungsten powder has been patented (see patent application No. 03150230.X), while the production method of ultra-fine nano-copper powder has not been reported.

Method used

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  • Method for mfg nano copper powder
  • Method for mfg nano copper powder

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1: When preparing 1 kg of nano Cu powder, it should be completed according to the following steps.

[0033] 1. Weigh 2.6kg CuSO 4 ·5H 2 O copper sulfate powder, CuSO 4 ·5H 2 O copper sulfate as CuSO 4 ·5H 2 O:H 2 Add O=1:1.5 mass ratio into water, heat to 40-50°C to fully dissolve, and filter impurities to prepare CuSO 4 aqueous solution;

[0034] 2. Preparation of NaOH caustic soda aqueous solution

[0035] Add 100g of NaOH caustic soda solid into 1000g of water and stir, fully dissolve and filter impurities to make NaOH aqueous solution for later use;

[0036] 3. Preparation of copper sulfate hydrazine mixed solution

[0037]According to the mass ratio of copper sulfate: hydrazine=1:0.5, 1.3kg of hydrazine solution was weighed, and the CuSO 4 The aqueous solution was slowly poured into N 2 h 4 ·H 2 Mix and stir in O hydrazine solution to prepare copper sulfate hydrazine mixed solution

[0038] 4. Slowly pour the NaOH aqueous solution into the ...

Embodiment 2

[0046] Embodiment 2: When preparing 500g of nano Cu powder, it should be completed according to the following steps.

[0047] 1. Weigh 1.3kg CuSO 4 ·5H 2 O copper sulfate powder, CuSO 4 ·5H 2 O copper sulfate as CuSO 4 ·5H 2 O:H 2 Add O=1:1.5 ratio to water, heat to 50°C, make it fully dissolved and filter to remove impurities, and prepare CuSO 4 aqueous solution;

[0048] 2. Preparation of NaOH caustic soda aqueous solution

[0049] Add 50g NaOH caustic soda solid into 500g water and stir, dissolve and filter impurities to make NaOH aqueous solution for subsequent use;

[0050] 3. Preparation of copper sulfate hydrazine mixed solution

[0051] According to the mass ratio of copper sulfate: hydrazine=1:0.5, 650g of hydrazine was weighed, and the CuSO 4 The aqueous solution was slowly poured into N 2 h 4 ·H 2 Mix and stir in O hydrazine solution; prepare copper sulfate hydrazine mixed solution

[0052] 4. It is basically the same as 4 in Example 1, except that the...

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Abstract

THe present invention provides a method for preparing nano-grade ultrafine copper powder, and its preparation process. Said process includes the following steps: dissolving CuSO4 containing copper ion in water, and using hydrazine to make CU(2+) ion be reduced into supperfine Cu granules, and in the reaction product using water to clean out SO4(2-) radical ion, and using ethyl alcohol to remove residual water and adopting the continuous rapid centrifugal separation method to separate waste liquor from precipitate, finally low-temp. drying in vacuum vibration drying machine so as to obtain nano Cu powder.

Description

technical field [0001] The invention belongs to the technical field of metal powder preparation in metal materials, and in particular provides a preparation method of nano-scale ultrafine copper powder, which is suitable for industrial production of nano-scale copper powder. Background technique [0002] With the rapid development of high technology, the application range of nano-scale ultra-fine copper powder is becoming more and more extensive, such as in ultra-fine nano-scale printed circuits, advanced anti-friction lubricants for cars, metal-plastic composite materials, conductive plastics, high-efficiency heat exchangers, etc. Nano-copper powder is inseparable. It is estimated that the demand for nano-copper powder in the world will exceed 2,000 tons in the past five years. In recent years, the research work on ultrafine-grained W-Cu and W-Ni-Cu alloys has progressed rapidly, because these alloys have the advantages of good arc erosion resistance, welding resistance, hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 张丽英吴成义
Owner UNIV OF SCI & TECH BEIJING
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