| 摘要 |
<p>PROBLEM TO BE SOLVED: To produce metal copper powder having different particle diameter corresponding to the application while narrowing the particle size distribution. SOLUTION: This producing method for the copper power comprises adding a reducing agent to a suspension, which is prepared by allowing a copper salt aq. solution to react with an alkali agent to deposit copper hydroxide, to intermediately reduce to cuprous oxide, blowing an oxygen-containing gas into the suspension of the cuprous oxide to oxidize and finally reducing to metal copper with a reducing agent in water. In such a case, the particle diameter of the copper power is controlled by adjusting the quantity and time for blowing the oxygen-containing gas.</p> |
