| 摘要 |
PROBLEM TO BE SOLVED: To provide niobium powder having excellent characteristics and high reliability and suitable for capacitors and to provide its manufacturing method. SOLUTION: The niobium powder consists of, by mass, <=7,000 ppm oxygen, <=200 ppm of one or more kinds among alkali metals and alkaline-earth metals and the balance essentially niobium. In the manufacturing method, reduction is performed at 600 to 900 deg.C for a period of time equivalent to the time required for regulating oxygen content in the niobium powder to be manufactured to 1,000 to 7,000 ppm by mass in the final stage of a reduction step in a process for reducing niobium oxide using one or more kinds among alkali metals and alkaline-earth metals.
|
