A method for producing a non-evaporable getter and a getter...

Details A method for producing a non-evaporable getter and a getter... A method for producing a non-evaporable getter and a getter...

B - Operations, Transporting

22

F

B22F 9/20 (2006.01) C22C 1/04 (2006.01) C22C 1/05 (2006.01) H01J 7/18 (2006.01)

Patent

CA 2285072

It is described a process for the production of porous non-evaporable getter materials comprising at least one first element selected between Zr and Ti and at least one second element among V, Cr, Mn and Ni, wherein the starting metal powders are produced by reduction with calcium hydride of the corresponding oxides and the thus obtained powders are compacted and sintered at a value of pressure and temperature in a given range; also described are getter materials that, due to the production process, have a novel distribution of chemical composition through the getter body resulting in an improved combination of mechanical and gas-sorption properties.

La présente invention concerne un procédé de production de matériaux getter poreux non évaporables comprenant au moins un premier élément choisi entre Zr et Ti et au moins un deuxième élément choisi entre V, Cr, Mn et Ni. Les poudres métalliques de départ sont produites par réduction des oxydes correspondants par un hydrure de calcium et les poudres obtenues sont ensuite comprimées et frittées à des valeurs de pression et de température comprises dans une plage donnée. L'invention se rapporte également à des matériaux getter dont la composition chimique présente dans tout le corps du getter, en raison du procédé de production, une nouvelle distribution résultant en une combinaison améliorée de leurs propriétés mécaniques et de sorption de gaz.

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