Patent ID: 7927167

Claim:
A process of evaporating a Ba-containing getter, comprising: inductively heating a pressed powder mixture comprising a Ba—Al alloy powder and a Ni powder present in a metal container having a plate thickness of t cm with an alternating current magnetic field at a frequency of f Hz, exothermically reacting the inductively heated Ba—Al alloy powder and the Ni powder in the pressed powder mixture at a temperature of from 750° C. to 900° C., and evaporating a Ba component from the exothermically reacted pressed powder mixture; wherein the metal container containing the pressed powder mixture is formed of at least one material selected from the group consisting of Fe, Ni, a Fe alloy and a Ni alloy, wherein during the inductive heating the plate thickness t of the metal container and the frequency f of the alternating current magnetic field satisfy: t≦ 12.7/( f ) 1/2 ; and wherein the pressed powder mixture is inductively heated in a vacuum atmosphere or an inert gas atmosphere.