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US 6,306,314 B1Granted
Evaporable getter device with reduced activation time
AssigneeSaes Getters S.P.A.
InventorsDaniele Martelli, Corrado Carretti, Luisa Mantovani, Raffaello Lattuada, Giuseppe Urso
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Abstract
An evaporable getter device containing a mixture of nickel and BaAl4 is made to have a shorter barium evaporation time by using a mixture of nickel powders in which the particles of nickel have different morphologies and different specific areas.
Claims11
An evaporable getter device, comprising:
- a metal container containing a powder mixture;
- the powder mixture comprising of BaAl4;
- and
- the powder mixture further comprising nickel (Ni) powder having a mixture of particles of at least first and second morphologies, the first morphology being essentially spherical and the second morphology being dendritic;
- wherein the nickel particles of the first morphology have an average specific area of between 0.25 m2/gram and 0.35 m2/gram, and the nickel particles of the second morphology have an average specific area of between 0.38 m2/gram and 0.50 m2/gram.
2 more elements
Dependencies are inferred from the claim text.