Nano level sheet copper zinc alloy powder and its producing method

A nano-scale and alloy powder technology is applied in the field of nano-scale flake copper-zinc alloy powder and its manufacturing, which can solve the problems of large powder thickness, uneven powder thickness distribution, difficulty in preparing thickness powder flakes, etc., and achieve the effect of uniform thickness

Inactive Publication Date: 2005-05-18
CENT SOUTH UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] ①The thickness of the powder is too large and uneven, the reflectivity is low, the brightness and metallic feeling are not good, and the covering power of the water surface is small
On the one hand, during the ball milling process, as the particle size of the powder decreases, the surface of the powder is easily oxidized and darkened, or even blackened. In addition, there are technical difficulties in the classification of flake particles, which makes it difficult to prepare thinner particles by the traditional ball milling method. Powder flakes, and powder thickness distribution is uneven
On the other hand, the surface of the powder obtained by mechanical transformation is uneven, and the shape of the powder is "Cornflake-like", which causes ...

Method used

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  • Nano level sheet copper zinc alloy powder and its producing method
  • Nano level sheet copper zinc alloy powder and its producing method

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Embodiment Construction

[0021] 1. Vacuum evaporation coating-crushing process to prepare nano-scale flake copper-zinc alloy powder

[0022] Thin copper rods, thin zinc rods and thin aluminum rods with a purity of 99.7% are added to the tantalum boat at the ratio of 91.1% copper, 7.9% zinc, and 1.0% aluminum for evaporation coating.

[0023] The analytical pure collodion with a nitrocellulose content greater than 5% is diluted with chemically pure n-pentyl acetate (content greater than 98.5%) to reduce the collodion content to 2%. Pour the collodion dilute solution into water, and a collodion film can be formed above the water surface. Dry the collodion film in a vacuum oven, or in an ordinary drying oven at about 50°C.

[0024] Put the prepared base film (i.e. collodion film) into the evaporation coating machine, then vacuumize, when the pressure drops to 20Pa, feed argon gas, and after the pressure drops to 10-3Pa and stabilizes for 20 minutes, the Coating can be evaporated. The current is 40A, a...

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Abstract

The nanometer level sheet Cu-Zn alloy powder contains Cu 68-93 wt%, Zn 6-30 wt% and Al 0.2-1.6 wt%. The nanometer level sheet Cu-Zn alloy powder is produced through depositing Cu, Zn and other elements onto superthin organic film continuously through film coating process; eliminating the organic film with solvent; crushing into nanometer level; drying; coating to denature and polishing. The present invention adopts slowly shifted composite substrate comprising soluble superthin organic film and flexible base, and the deposited atoms move along the superthin organic film and coagulate onto the stable and metastable position on the organic film to form compact and smooth nanometer film. The nanometer level sheet Cu-Zn alloy powder of the present invention has homogeneous grain thickness of 30-100 nm, leveled and smooth surface, grain size of 0.1-3 micron and diameter/thickness ratio of 30-900.

Description

technical field [0001] The invention relates to a metal powder, especially a nano-scale flake copper-zinc alloy powder and a manufacturing method thereof. Background technique [0002] Flake copper-zinc alloy powder is also called imitation gold-copper alloy powder, commonly known as "copper-gold powder". Because of its good light reflection effect, the metal color is lifelike like gold, magnificent, bright and durable, and has good dispersion and strong adhesion. It is widely used in many industrial fields such as various modern decorations, high-end color printing packaging such as tobacco and alcohol, top coats for automobiles and motorcycles, and handicraft decoration. With the development of the national economy and the continuous improvement of people's living standards, flaky copper-zinc alloy powder as one of the metal pigments has been more and more widely used in decoration, decoration, packaging, color printing, automobiles, motorcycles and other fields. Its qual...

Claims

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Application Information

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IPC IPC(8): B22F9/00C22C9/04
Inventor 陈振兴王零森
Owner CENT SOUTH UNIV
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