公开(公告)号：EP1799380B1

公开(公告)日：2018-09-12

申请号：EP05800895.4

申请日：2005-09-19

申请人： H.C. Starck Tantalum and Niobium GmbH

发明人： LEONID NATAN, Shekhter ,  LEONID, Lanin ,  CONLON, Anastasia, M.

IPC分类号： B22F9/20 ,  B22F9/22 ,  C22C1/04 ,  C22B5/04 ,  C22B34/24 ,  H01G9/052 ,  C22B26/22

CPC分类号： C22B5/04 ,  B22F9/20 ,  B22F9/22 ,  C22B26/22 ,  C22B34/24 ,  C22C1/045 ,  H01G9/0525

摘要： A method of producing a refractory metal powder that includes providing a metal powder containing magnesium tantalate or magnesium niobate; and heating the powder in an inert atmosphere in the presence of magnesium, calcium and/or aluminum to a temperature sufficient to remove magnesium tantalate or magnesium niobate from the powder and/or heating the powder under vacuum to a temperature sufficient to remove magnesium tantalate or magnesium niobate from the powder, the heating steps being performed in any order. The metal powder can be formed into pellets at an appropriate sintering temperature, which can be formed into electrolytic capacitors.