| 摘要 |
<p>A novel method for producing a fine metal powder, which comprises subjecting a solution containing a tetravalent titanium ion and having a pH of 7 or less to a cathode electrolysis treatment to reduce a part of the tetravalent titanium ion to a trivalent ion and prepare an aqueous reducing agent solution containing both the trivalent titanium ion and the tetravalent titanium ion, and adding a water soluble compound of the metal element to the resulting mixture, followed by mixing, to reduce an ion of the metal and precipitate the metal by the reducing action originating from the oxidation of the trivalent titanium ion to the tetravalent titanium ion. The method can be used for producing a high purity fine metal powder which is finer than a conventional fine metal powder, has a narrow particle diameter distribution and is free of an impurity, at a lower cost on a large scale with safety.</p> |
