Copper powder obtained by reduction reaction of copper oxide. Fine reduced copper powder with an average particle size of about 10 μ m is difficult to prepare high-performance products through injection molding due to its irregular powder morphology and high residual oxygen content This study found that using a multi-component binder based on a large amount of main polymer can overcome the severe friction between powders caused by irregular powder morphology, and smoothly inject this fine reduced copper powder into shape During sintering, if residual oxides in the powder can be effectively reduced before the sintering holes are closed, and appropriate insulation is provided at a temperature below 900 ℃, the sintering density of injection molded components can reach up to 95% of the theoretical density Under these conditions, the conductivity of injection molded components can reach over 80% of that of pure copper.
The production process of copper powder
The production process of electrolytic copper powder is as follows:
Electrolytic copper plate - melting - electrolysis - powder washing - vacuum drying - grading - batching - packaging
The production process of low bulk density water atomized copper powder is as follows:
Electrolytic copper plate - melting - water atomization - vacuum drying - high temperature oxidation - crushing - reduction - grading - batching - packaging
The production process of imitation gold copper alloy powder is as follows:
Copper and other raw materials - ingredients - atomization - transformation - ultrafine grinding and grading - polishing - finished products
Types and Applications of Copper Powder
Raw materials: mainly pure copper ingots, some high-purity copper alloy scraps.
High purity copper powder for catalysts: mainly used as auxiliary materials for coal to oil production, with the market mainly in Shaanxi and Inner Mongolia regions and coal to oil projects highly developed in recent years.
Thermal conductive copper powder: mainly used for laptops LED、 The main markets for heat dissipation modules such as mobile phones are in the Yangtze River Delta and Pearl River Delta regions.
Bronze powder for powder metallurgy: Bronze series powder metallurgy oil containing bearings have been promoted since 1920. Due to their special structure, they do not require the consumption of lubricating oil during movement, making them very suitable for situations where oil supply is difficult and lubricating oil pollution is avoided. They have now become an indispensable part of the development of automobiles, home appliances, audio equipment, office equipment, precision machinery, electric tools, and other industries.
The use of copper powder
