Title:
バルブメタル粉末の脱酸素
Document Type and Number:
Japanese Patent JP2008512568
Kind Code:
A
Abstract:
Deoxidation of valve metal powders, in particular of niobium powders, tantalum powders or their alloys, by treating the valve metal powder with calcium, barium, lanthanum, yttrium or cerium as deoxidising agent, and valve metal powders that are distinguished by a ratio of the sum of the contents of sodium, potassium and magnesium to the capacitance of less than 3 ppm/10,000 muFV/g.
Inventors:
Joshua Leffel Holtz
Ulrich Baltmann
Ulrich Baltmann
Application Number:
JP2007530614A
Publication Date:
April 24, 2008
Filing Date:
August 26, 2005
Export Citation:
Assignee:
H.C. Starck GmbH & Co. KG
International Classes:
B22F9/20; B22F1/00; C22B34/24; C22C27/02
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Hiroshi Sugimoto
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Hiroshi Sugimoto
Einzel Felix-Reinhard
Reinhard Einsel