| 摘要 |
<p>The present invention provides a method for finely powdering tungsten powder, comprising electrolytically oxidizing tungsten powder while stirring in an aqueous mineral-acid solution to form an oxide film in the surface of the tungsten powder and removing the oxide film with an alkaline aqueous solution; a method for producing tungsten powder to obtain fine tungsten powder by a process including the above method for finely powdering; and a tungsten powder having an average particle size of 0.04 to 0.4 µm, in which the dMS value (product of an average particle size d (µm), true density M (g/cm 3 ) and BET specific surface area S (m 2 /g)) is within the range of 6±0.4.</p> |
