| 摘要 |
<p>The process of the present invention provides for the sorption of residual gas in a vessel by means of a non-activated, non-evaporated barium getter. It comprises the steps of reducing an alloy of Baz + (Ba1-xAx)nnBm to a particle size of less than 5mm, under vacuum or an inert gas atmosphere and then placing the particulate alloy in the vessel. Upon exposing the particulate alloy to the residual gas in the vessel at room temperature the gas is sorbed. The metal A is a metal selected from the group consisting of elements of Group IIa of the periodic table of elements, excluding barium. The metal B is selected from the group consisting of elements of Group Ib, IIb, IIIa, IVa and Va of the periodic table of elements. Furthermore n = 1, 2, 3 or 4 and m = 1, 2 or 5, whereas o </= x </= 0.5 and z is a value from zero to such a value that the total barium in the alloy is less than 95% by weight of the alloy. <IMAGE></p> |
