| 摘要 |
PROBLEM TO BE SOLVED: To provide a solid electrolytic capacitor having a high capacity, reduced in leak current and excellent in long-term reliability by obtaining a nitrogen-containing metal powder having a large specific surface area and uniformly containing an appropriate amount of nitrogen in metal in a high productivity.SOLUTION: In a method for forming tantalum by reducing a tantalum metal salt with a reductant in a molten diluting salt, a method for producing a nitrogen-containing tantalum powder is characterized in that tantalum containing nitrogen is formed by introducing a nitrogen-containing gas into a space brought into contact with a reaction melt containing the metal salt, the reductant, and the diluting salt, and that when reduction is performed by stirring the reaction melt with a stirring blade, the number of revolution of the stirring blade is reduced on the way of the reduction. |
