Copper powder screening

Copper powder screening solution

Solution introduction

Copper powder obtained by reduction reaction of copper oxide. Fine reduced copper powder with an average particle size of about 10μm is not easy to prepare high-performance products by injection molding due to its irregular powder shape and high residual oxygen content. This study found that the use of a multi-component binder based on a large amount of backbone polymer can overcome the severe friction between powders caused by the irregular powder shape, and smoothly injection mold this fine reduced copper powder. During sintering, if the residual oxide in the powder can be effectively reduced before the sintering pores are closed, such as proper insulation at a temperature below 900℃, the sintering density of the injection molded component can reach 95% of the theoretical density. Under this condition, the conductivity of the injection molded component can reach more than 80% of the conductivity of pure copper.

Copper powder production process

The electrolytic copper powder production process flow is:

Electrolytic copper plate - smelting - electrolysis - powder washing - vacuum drying - grading - batching - packaging.

The production process of low bulk density water atomized copper powder is:

Electrolytic copper plate - smelting - water atomization - vacuum drying - high temperature oxidation - crushing - reduction - grading - batching - packaging.

The production process flow of imitation gold-copper alloy powder is:

Copper and other raw materials - ingredients - atomization - transformation - ultrafine crushing and classification - polishing - finished product.

Types and applications of copper powder

Raw and auxiliary materials: mainly pure copper ingots and some high-purity copper alloy scraps.

High-purity copper powder for catalysts: mainly used as auxiliary materials for coal-to-liquids. The market is mainly in Shaanxi and Inner Mongolia, and coal-to-liquids projects have developed rapidly in recent years.

Thermal conductive copper powder: Mainly used in cooling modules such as laptops, LEDs, and mobile phones. The main markets are the Yangtze River Delta and Pearl River Delta regions.

Bronze powder for powder metallurgy: Bronze series powder metallurgy oil-containing bearings have been popularized since 1920. Due to their special structure, there is no need to consume lubricating oil during movement. They are very suitable for situations where oil supply is difficult and lubricating oil contamination is avoided. It has now become an indispensable part for the development of automobiles, home appliances, audio equipment, office equipment, precision machinery, power tools, etc.