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Core-shell structure copper-coated iron nanometer composite powder and preparation method and application thereof

A nano-composite, core-shell structure technology, applied in the direction of liquid chemical plating, coating, metal material coating technology, etc., to achieve the effect of complete coating, convenient operation, and uniform distribution of components

Inactive Publication Date: 2016-01-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] So far, there is no report on the surface coating of nano-iron powder by surface deposition method

Method used

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  • Core-shell structure copper-coated iron nanometer composite powder and preparation method and application thereof
  • Core-shell structure copper-coated iron nanometer composite powder and preparation method and application thereof
  • Core-shell structure copper-coated iron nanometer composite powder and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Take 2g of copper acetate and dissolve it in 150ml of dimethylformamide, and keep stirring to completely dissolve the copper acetate in dimethylformamide;

[0033] (2) Slowly stir 1g of nano-iron powder with an average particle size of 50nm into the above copper acetate solution. Under continuous stirring conditions, slowly raise the temperature of the mixed solution to 40°C at a heating rate of 2°C / min. After constant temperature reaction for 10min, stop Reaction, cooled to room temperature;

[0034] (3) The mixed solution obtained above is subjected to centrifugal sedimentation in an ultra-high-speed (rotating speed ≥ 6000r / min) centrifuge, and then the particles in the lower layer are washed with absolute ethanol for three times. The washed lower particles were extracted with acetone for 12h and then poured into a petri dish, at 10 4 Dry in a Pa vacuum oven at a low temperature of 20°C for 24 hours to obtain nanoscale copper-coated iron composite powder. The el...

Embodiment 2

[0038] (1) Take 11g of copper acetate and dissolve it in 250ml of dimethylformamide, and keep stirring to completely dissolve the copper acetate in dimethylformamide;

[0039] (2) Slowly stir 3g of nano-iron powder with an average particle size of 30nm into the above copper acetate solution. Under continuous stirring conditions, slowly raise the temperature of the mixed solution to 60°C at a heating rate of 4°C / min. After 25 minutes of constant temperature reaction, stop Reaction, cooled to room temperature;

[0040] (3) The mixed solution obtained above is subjected to centrifugal sedimentation in an ultra-high-speed (rotating speed ≥ 6000r / min) centrifuge, and then the particles in the lower layer are washed with absolute ethanol for three times. The washed lower particles were extracted with acetone for 12h and then poured into a petri dish, at 10 2 Dry in a Pa vacuum oven at a low temperature of 30°C for 8 hours to obtain nanoscale copper-coated iron composite powder. El...

Embodiment 3

[0042] (1) Weigh 30g of copper acetate and dissolve it in 100ml of dimethylformamide at a temperature of 45-50°C, and keep stirring to completely dissolve the copper acetate in dimethylformamide;

[0043] (2) Slowly stir 2.5g of nano-iron powder with an average particle size of 100nm into the above copper acetate solution, and under continuous stirring conditions, slowly heat the mixed solution to 70°C at a heating rate of 6°C / min, and after constant temperature reaction for 30min, Stop the reaction and cool to room temperature.

[0044] (3) The mixed solution obtained above is subjected to centrifugal sedimentation in an ultra-high-speed (rotating speed ≥ 6000r / min) centrifuge, and then the particles in the lower layer are washed with absolute ethanol for three times. The washed lower particles were extracted with acetone for 12h and then poured into a petri dish, at 10 4 Nanoscale copper-coated iron composite powder was obtained by drying in a Pa vacuum drying oven at a low...

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Abstract

The invention discloses core-shell structure copper-coated iron nanometer composite powder and a preparation method and application thereof. The nanometer composite powder is of a core-shell structure, the core of the core-shell structure is nanometer iron powder, and the shell is a nanometer copper film. According to the preparation method, cupric acetate is dissolved in dimethylformamide, and a cupric acetate solution is obtained; the nanometer iron powder is added into the cupric acetate solution during stirring and heated to 40-70 DEG C; after constant-temperature reaction, solid and liquid are separated, and the core-shell structure copper-coated iron nanometer composite powder is obtained. According to the application, the composite powder is formed in a pressed mode through a common powder metallurgy technology, the density of the materials is larger than or equal to 7.1 g / cm<3> after sintering, and the grain size is smaller than or equal to 5 microns. The method is simple, operation is convenient, quality is stable, and the process is controllable. The prepared nanometer composite powder is completely wrapped. The preparation system is low in oxygen content, the preparation process is safe and stable, and the prepared copper-coated iron nanometer composite powder is stable in property, high in oxidation resistance and capable of being produced in batches, thereby being proper raw materials for preparing high-performance nanometer powder metallurgy materials.

Description

technical field [0001] The invention relates to a copper-coated iron nanocomposite powder with a core-shell structure, a preparation method and an application thereof, and belongs to the technical field of preparation of functional materials. Background technique [0002] With the rapid development of nanotechnology, nanomaterials and technology have become the most active research direction in the field of materials. However, the research and application of nanomaterials in the powder metallurgy industry is still very little. The reason is that there is a lack of suitable nanostructured raw materials, because nanostructured metal powders are highly active, have a large specific surface area, and have high surface activity. Agglomeration, in the air, nanoparticles will absorb a large amount of oxygen, water and other gases, extremely unstable or even spontaneous combustion, which seriously restricts its practical application; taking Fe-Cu-C material as an example, if the nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02C23C18/54
Inventor 李松林陈莲君周忠诚杨英杰欧阳齐
Owner CENT SOUTH UNIV
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