US4312669A
Expired / Lapsed
US
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Non-evaporable ternary gettering alloy and method of use for the sorption of water, water vapor and other gases
Assignee: SAES Getters SpA
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Filing: 1980-01-24
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Granted: 1982-01-26
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Expires: 2000-01-24
Abstract
Abstract A non-evaporable getter alloy is provided which can be used in a process for the sorption of gas from a closed vessel comprising the step of: introducing into the vessel a non-evaporable ternary gettering alloy whose composition in weight percent when plotted on a ternary composition diagram in weight percent Zr, weight percent V and weight percent Fe lies with a polygon having as its corners the points defined by: (a) 75% Zr-20% V-5% Fe (b) 45% Zr-20% V-35% Fe (c) 45% Zr-50% V-5% Fe such alloys can sorb water vapor without the release of H 2 between 200°-350° C. and can be used in a wide temperature range for the sorption of other gases. They can also be activated in short times at relatively low temperatures, to be used as a getter at room temperature.
Inventors
- 👤 Claudio Boffito
- 👤 Aldo Barosi
- 👤 Alessandro Figini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:47
CPC Classifications
C; C22; C22C; C22C16/00; C01; C01B; C01B3/00; C01B3/0005; C01B3/001; C01B3/0018; C01B3/0031; H; H01; H01J; H01J7/00; H01J7/14; H01J7/18; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/32; Y10; Y10S; Y10S420/00; Y10S420/901
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
129 words
A process for the sorption of gas from a closed vessel comprising the steps of: (A) introducing into the vessel a non-evaporable ternary gettering alloy whose composition in weight percent when plotted on a ternary composition diagram in weight percent Zr, weight percent V and weight percent Fe lies within a polygon having as its corners the points defined by: a--75% Zr - 20% V - 5% Fe b--45% Zr - 20% V - 35% Fe c--45% Zr - 50% V - 5% Fe (B) evacuating the vessel to a pressure of less than 10 -2 torr (C) activating the gettering alloy by heating the ternary alloy to a temperature of greater than 700° C. and, (D) reducing the temperature to a value between 400° C. and 25° C.
Claim 2
Dependent Claim
129 words
A process for the sorption of gas from a closed vessel comprising the steps of: (A) introducing into the vessel a non-evaporable ternary gettering alloy whose composition in weight percent when plotted on a ternary composition diagram in weight percent Zr, weight percent V and weight percent Fe lies within a polygon having as its corners the points defined by: a--75% Zr - 20% V - 5% Fe b--45% Zr - 20% V - 35% Fe c--45% Zr - 50% V - 5% Fe (B) evacuating the vessel to a pressure of less than 10 -2 torr (C) activating the gettering alloy by heating the ternary alloy to a temperature of greater than 700° C. and, (D) reducing the temperature to a value between 400° C. and 25° C.
Claim 3
Dependent Claim
77 words
A process of claim 1 in which the ternary alloy composition lies within a polygon having as its corners the points defined by: (d) 70% Zr - 25% V - 5% Fe (e) 70% Zr - 24% V - 6% Fe (f) 66% Zr - 24% V - 10% Fe (g) 47% Zr - 43% V - 10% Fe (h) 47% Zr - 45% V - 8% Fe (i) 50% Zr - 45% V - 5% Fe.
Claim 4
Dependent Claim
139 words
A process for the sorption of gas from a closed vessel comprising the step of: (A) introducing into the vessel a non-evaporable ternary gettering alloy whose composition in weight percent when plotted on a ternary composition diagram in weight percent Zr, weight percent V and weight percent Fe lies within a polygon having as its corners the points defined by: a--75% Zr - 20% V - 5% Fe b--45% Zr - 20% V - 35% Fe c--45% Zr - 50% V - 5% Fe (B) evacuating the vessel to a pressure of less than 10 -2 torr (C) activating the gettering alloy by heating the ternary alloy to a temperature of not greater than 450° C. for a time of between 1 to 10 minutes and (D) reducing the temperature to a value between 400° C. and 25° C.
Claim 5
Dependent Claim
139 words
A process for the sorption of gas from a closed vessel comprising the step of: (A) introducing into the vessel a non-evaporable ternary gettering alloy whose composition in weight percent when plotted on a ternary composition diagram in weight percent Zr, weight percent V and weight percent Fe lies within a polygon having as its corners the points defined by: a--75% Zr - 20% V - 5% Fe b--45% Zr - 20% V - 35% Fe c--45% Zr - 50% V - 5% Fe (B) evacuating the vessel to a pressure of less than 10 -2 torr (C) activating the gettering alloy by heating the ternary alloy to a temperature of not greater than 450° C. for a time of between 1 to 10 minutes and (D) reducing the temperature to a value between 400° C. and 25° C.
Claim 6
Dependent Claim
105 words
A process of claim 3 in which: introducing into the vessel a non-evaporable ternary gettering alloy whose composition in weight percent when plotted on a ternary composition diagram in weight percent Zr, weight percent V and weight percent Fe lies within a polygon having as its corners the points defined by (d) 70% Zr - 25% V - 5% Fe (e) 70% Zr - 24% V - 6% Fe (f) 66% Zr - 24% V - 10% Fe (g) 47% Zr - 43% V - 10% Fe (h) 47% Zr - 45% V - 8% Fe (i) 50% Zr - 45% V - 5% Fe.
Claim 7
Dependent Claim
84 words
A process for sorbing both oxygen and hydrogen from water comprising contacting the water with a non-evaporable getter metal consisting essentially of a ternary alloy whose composition in weight percent when plotted on a ternary composition diagram in weight percent Zr, weight percent V and weight percent Fe lies within a polygon having as its corners the points defined by: a--75% Zr - 20% V - 5% Fe b--45% Zr - 20% V - 35% Fe c--45% Zr - 50% V - 5% Fe.
Claim 8
Dependent Claim
84 words
A process for sorbing both oxygen and hydrogen from water comprising contacting the water with a non-evaporable getter metal consisting essentially of a ternary alloy whose composition in weight percent when plotted on a ternary composition diagram in weight percent Zr, weight percent V and weight percent Fe lies within a polygon having as its corners the points defined by: a--75% Zr - 20% V - 5% Fe b--45% Zr - 20% V - 35% Fe c--45% Zr - 50% V - 5% Fe.
Claim 9
Dependent Claim
113 words
A process for sorbing both oxygen and hydrogen from water comprising contacting the water with a non-evaporable getter metal consisting essentially of a ternary alloy whose composition in weight percent when plotted on a ternary composition diagram in weight percent Zr, weight percent V and weight percent Fe lies within a polygon having as its corners the points defined by: (d) 70% Zr - 25% V - 5% Fe (e) 70% Zr - 24% V - 6% Fe (f) 66% Zr - 24% V - 10% Fe (g) 47% Zr - 43% V - 10% Fe (h) 47% Zr - 45% V -8% Fe (i) 50% Zr - 45% V - 5% Fe.
Claim 10
Dependent Claim
113 words
A process for sorbing both oxygen and hydrogen from water comprising contacting the water with a non-evaporable getter metal consisting essentially of a ternary alloy whose composition in weight percent when plotted on a ternary composition diagram in weight percent Zr, weight percent V and weight percent Fe lies within a polygon having as its corners the points defined by: (d) 70% Zr - 25% V - 5% Fe (e) 70% Zr - 24% V - 6% Fe (f) 66% Zr - 24% V - 10% Fe (g) 47% Zr - 43% V - 10% Fe (h) 47% Zr - 45% V -8% Fe (i) 50% Zr - 45% V - 5% Fe.
Claim 11
Dependent Claim
22 words
A process of claim 5 in which the getter metal is heated to a temperature of between 250° C. and 350° C.
Claim 12
Dependent Claim
25 words
A process of any of claims 1 to 7 in which the gettering alloy is particulate and has a particle size of less than 500μ.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-25 | 1985-07-27 | 1986-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-25 | 1989-07-27 | 1990-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-25 | 1993-07-27 | 1994-01-26 | $7700.00 | Window Closed / Lapsed |