Method for the production of metal powders or metal hydride...

B - Operations – Transporting – 22 – F

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B22F 9/20 (2006.01) C01B 6/00 (2006.01) C22B 3/10 (2006.01)

Patent

CA 2532128

A method for the production of metal powders or metal hydride powders of the elements Ti, Zr, Hf, V, Nb, Ta and Cr is disclosed, whereby an oxide of the said elements is mixed with a reducing agent and said mixture, optionally with a hydrogen atmosphere (for the production of metal hydrides), is heated until the reduction reaction commences, the reaction product is quenched, then washed and dried. The oxide used has an average particle size of 0.5 to 20 m, a BET specific surface of 0.5 to 20 m2/g and a minimum content of 94 wt. %.

L'invention concerne un procédé permettant de produire des poudres métalliques ou des poudres d'hydrures métalliques des éléments Ti, Zr, Hf, Nb, Ta et Cr, selon lequel un oxyde de ces éléments est mélangé avec un agent de réduction et ledit mélange est chauffé dans un four éventuellement dans une atmosphère d'hydrogène (les hydrures métalliques se forment alors), jusqu'à ce que la réaction de réduction débute. Le produit de réaction est lessivé, puis lavé et séché. L'oxyde utilisé présente une dimension moyenne de grain de l'ordre de 0,5 à 20 µm, une surface spécifique selon BET comprise entre 0,5 et 20 m?2¿/g et une teneur minimale de 94% en poids.

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