Nano level sheet copper zinc alloy powder and its producing method

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...

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 light scattering and diffuse reflection on the surface and edge of the powder, seriously affecting the brightness, color and metallic feeling of the powder

Thick and uneven powders have low directional migration ability during ink printing and paint spraying, and are not easy to be aligned in parallel on the surface of the substrate. The light reflectivity is low, ranging from 60 to 80%, which seriously affects the metallic feeling and luster. Wait for the effect

In addition, the traditional imitation gold-copper alloy powder has a low covering power on the water surface, and the maximum is no more than 1.4m 2 / g, the powder consumption per unit printing and coating area is relatively large

②The production process is complex and the production cycle is long

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