Progress in the preparation of micro-nano copper powder
With the rapid development of the fields of electronic information and new energy industries,the demand for new high-end functional metal materials has become more urgent.The micro-nano high purity copper powder has excellent characteristics,such as low sintering-temperature,low softening-temperature,high specific-surface,high electrical and thermal conductivity,and thus has become a key material in PCB interconnect,metallurgy and wind power fields.However,the preparation of micro-nano copper powders has still some difficult problems.In this pa-per,different preparation processes for micro-nano copper powders are analyzed,as well as their advantages and dis-advantages.In the preparation of micron-sized copper powders,both electrolysis and atomization method are mainly adopted,but the purity of the copper powders obtained from the preparation is low.For the nano-sized copper pow-ders,the liquid-phase reduction method is mainly adopted,which can meet the requirements of high purity and small size,while the difficulties of engineering mass production are needed to overcome.
copper powdermicro-nano particlesinterconnectsadditive for lubricating
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