초록

Non-evaporable getter alloys containing zirconium, vanadium, iron, manganese and one or more elements selected among yttrium, lanthanum and Rare Earths are described, having improved features of gas sorption, particularly of nitrogen, with respect to the known getter alloys.

대표청구항 ▼

1. Non-evaporable getter alloys having high gas sorption efficiency, particularly for nitrogen, comprising zirconium, vanadium, iron, manganese and at least one element selected among yttrium, lanthanum and Rare Earths, having a weight percent composition of the elements which can vary within the fo

1. Non-evaporable getter alloys having high gas sorption efficiency, particularly for nitrogen, comprising zirconium, vanadium, iron, manganese and at least one element selected among yttrium, lanthanum and Rare Earths, having a weight percent composition of the elements which can vary within the following ranges: zirconium from 60 to 85%; vanadium from 2 to 20% iron from 0.5 to 10%; manganese from 2.5 to 30%; and yttrium, lanthanum, Rare Earths or mixtures thereof from 1 to 6%. 2. Alloys according to claim 1, wherein the weight percentage of zirconium is comprised between about 65 to 75%. 3. Alloys according to claim 2, wherein the weight percentage of zirconium is comprised between about 67 and 70%. 4. Alloys according to claim 1, wherein the weight percentage of vanadium is comprised between about 2.5% and 15%. 5. Alloys according to claim 1, wherein the weight percentage of manganese is comprised between about 5 and 25%. 6. Alloys according to claim 1, wherein the weight ratio between iron and vanadium is between 1:4 and 1:5. 7. An alloy according to claim 1 having the composition Zr 70%-V 15%-Fe 3.3%-Mn 8.7%-mischmetal 3%. 8. An alloy according to claim 1 having the composition Zr 69%-V 2.6%-Fe 0.6%-Mn 24.8%-mischmetal 3%. 9. Getter devices comprising the alloys of claim 1 in powder form. 10. Devices according to claim 9, wherein said alloys have particle size lower than 250 μm. 11. Devices according to claim 9, wherein the powders have particle size comprised between 125 and 40 μm. 12. Devices (10) according to claim 9, formed of pellets made only of powders of the getter alloy. 13. Devices (20) according to claim 9, obtained cutting along parallel lines in the longitudinal direction a band (21) formed of a metal support (22) on which powders (23) of a getter alloy are provided. 14. Devices (30) according to claim 9, formed of powders of a getter alloy (32) inside an upperly open metal container (31). 15. Devices (40) according to claim 9, formed of powders of a getter alloy (42) inside a metal container (41) having an upper opening closed by a porous septum (43). 16. Devices (50) according to claim 15 containing, besides the powders of the getter alloy (51), powders of a moisture sorbing material (52). 17. Thermally insulating manufactured articles comprising an evacuated interspace, wherein the interspace comprises an alloy according to claim 1. 18. Manufactures articles according to claim 17, wherein the interspace contains getter devices according to claim 11. 19. Gas purifiers containing an alloy according to claim 1. 20. Purifiers according to claim 19, containing getter devices according to claim 12. 21. Lamps containing an alloy according to claim 1. 22. Lamps according to claim 21, containing getter devices according to claim 13. 23. Evacuated chambers of inertial energy accumulators containing an alloy according to claim 1. 24. Chambers according to claim 23 containing devices according to claim 15. 25. Chambers according to claim 23 containing devices according to claim 16.