US4049443A
Expired / Lapsed
US
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Method of fabrication of an alloy containing an alkali metal and/or an alkaline-earth metal
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1976-01-09
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Granted: 1977-09-20
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Expires: 1996-01-09
Abstract
Abstract The method consists in subjecting a mixture of an alkali nitride and/or an alkaline-earth nitride to thermal decomposition in vacuo in the presence of at least one metallic component with which it is desired to alloy the alkali metal and/or the alkaline-earth metal, the metals thus brought together are melted and the alloy thus obtained is homogenized.
Inventors
- 👤 Andre Hatterer
- 👤 Claude Oberlin
- 👤 Pierre Strobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:24
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/04; H01J9/042; C; C22; C22C; C22C1/00; C22C1/02; G; G21; G21H; G21H1/00; G21H1/10; G21H1/103; H01J7/00; H01J7/14; H01J7/18; H01J7/183
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
88 words
A method of producing an alloy containing an alkali metal, an alkali-earth metal and a metal co-component alloyable therewith, comprising: confining at least one alkali metal nitride, at least one alkali-earth metal nitride and at least one metallic co-component of the alloy to be formed in a reaction chamber; thermally decomposing, substantially in a vacuum, said alkali metal nitride and said alkali-earth metal nitride in said chamber to a mixture of said alkali and alkali-earth metals, and melting said mixture of metals thereby forming a substantially homogeneous alloy.
Claim 2
Independent Claim
88 words
A method of producing an alloy containing an alkali metal, an alkali-earth metal and a metal co-component alloyable therewith, comprising: confining at least one alkali metal nitride, at least one alkali-earth metal nitride and at least one metallic co-component of the alloy to be formed in a reaction chamber; thermally decomposing, substantially in a vacuum, said alkali metal nitride and said alkali-earth metal nitride in said chamber to a mixture of said alkali and alkali-earth metals, and melting said mixture of metals thereby forming a substantially homogeneous alloy.
Claim 3
Dependent Claim
28 words
A method according to claim 1, wherein a nitrogen getter selected from the group consisting of titanium and zirconium is added to the metals during the melting process.
Claim 4
Dependent Claim
30 words
A method according to claim 1, wherein a nitrogen getter selected from the group consisting of titanium and zirconium is added to the alloy after said alloy has been formed.
Claim 5
Dependent Claim
49 words
A method as claimed in claim 1 wherein said alloy is a ternary alloy of an alkali metal consisting of caesium and of an alkali-earth metal selected from the group consisting of strontium and barium, with a metallic component selected from the group consisting of tin, gold and silicon.
Claim 6
Dependent Claim
52 words
A method as claimed in claim 1 wherein said alloy is a quaternary alloy of an alkali metal consisting of caesium and of an alkali-earth metal selected from the group consisting of strontium and barium, with two metallic components selected from the group consisting of aluminum, gallium, indium, tin, gold and silicon.
Claim 7
Dependent Claim
17 words
The method as defined in claim 1 wherein said melting is carried out at about 1000° C.
Claim 8
Dependent Claim
17 words
The method as defined in claim 1 wherein said melting is carried out for about two hours.
Claim 9
Dependent Claim
17 words
The method as defined in claim 1 wherein said decomposition is carried out at about 140° C.
Claim 10
Dependent Claim
15 words
A thermionic diode containing an alloy produced by the method as defined in claim 4.
Claim 11
Dependent Claim
14 words
A multi-element spectrum lamp containing an alloy produced by the method of claim 4.
Claim 12
Dependent Claim
14 words
A multi-element spectrum lamp containing an alloy produced by the method of claim 5.
Claim 13
Dependent Claim
19 words
A getter adapted to trap oxygen and water vapors containing an alloy produced by the method of claim 4.
Claim 14
Dependent Claim
19 words
A getter adapted to trap oxygen and water vapors containing an alloy produced by the method of claim 5.
Claim 15
Independent Claim
85 words
A method of producing an alloy containing at least one metal selected from the group consisting of alkali metals and alkali-earth metals, and an additonal metal co-component; confining at least one nitride selected from the group consisting of alkali metal nitrides and alkali-earth metal nitrides in a reaction chamber with the additional metal co-component alloyable with said metals; and thermally decomposing in a vacuum, said nitride to its component metal and nitrogen; and melting the resultant mixture of metals thereby forming a substantially homogeneous alloy.
Claim 16
Independent Claim
85 words
A method of producing an alloy containing at least one metal selected from the group consisting of alkali metals and alkali-earth metals, and an additonal metal co-component; confining at least one nitride selected from the group consisting of alkali metal nitrides and alkali-earth metal nitrides in a reaction chamber with the additional metal co-component alloyable with said metals; and thermally decomposing in a vacuum, said nitride to its component metal and nitrogen; and melting the resultant mixture of metals thereby forming a substantially homogeneous alloy.
Claim 17
Dependent Claim
30 words
A method, as claimed in claim 14 wherein said metal co-component and the said nitride are both in a granular form and are mixed together before the thermal decomposing step.
Claim 18
Dependent Claim
20 words
A method, as claimed in claim 14 wherein the melting step is carried out with argon filling the reaction chamber.
Claim 19
Dependent Claim
21 words
A method, as claimed in claim 14, wherein the inner wall of the reaction chamber is composed of said metallic co-component.
References Cited (Backward Citations)
US1797131A
Cited
US2132408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |