Reduction of nb or ta oxide powder by a gaseous light metal...

Details Reduction of nb or ta oxide powder by a gaseous light metal... Reduction of nb or ta oxide powder by a gaseous light metal...

B - Operations, Transporting

22

F

B22F 1/00 (2006.01) B22F 9/22 (2006.01)

Patent

CA 2331707

Metal powder Ta and/or Nb, with or without one or metals from the group Ta, Nb, Ti, Mo, W, V, Zr and Hf, is made in a fine powder form by reduction of metal oxide by contact with a gaseous reducing agent, preferably an alkaline earth metal, to near complete reduction, leaching, further deoxidation and agglomeration, the powder so produced being sinterable to capacitor anode form and processable to other usages.

L'invention concerne une poudre métallique de Ta et/ou Nb, avec un ou plusieurs des métaux sélectionnés dans le groupe constitué par Ta, Nb, Ti, Mo, W, V, Zr et Hf. Une fine poudre s'obtient par la réduction d'oxydes métalliques par contact avec un agent de réduction gazeux, de préférence un métal terreux alcalin, jusqu'à réduction quasi complète, lixiviation, nouvelle réduction et agglomération. La poudre ainsi produite peut être agglomérée par frittage sous forme d'anode de condensateur et traitée à d'autres fins.

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