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US3650844A
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Diffusion barriers for semiconductive thermoelectric generator elements
Assignee: General Electric Co
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Filing: 1968-09-19
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Granted: 1972-03-21
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Expires: 1988-09-19
Abstract
Abstract In the manufacture of thermoelectric generators of the lead telluride type, it is desirable that the joints between the thermoelements and the electrodes or bridging members have low electrical resistance and resist fracture during thermal cycling. When materials having a linear coefficient of thermal expansion which is near that of the lead telluride, such as AISI Type 300 stainless steels are used, mechanical failure due to thermal mismatch is eliminated, but unwanted diffusion from the ferrous body into the lead telluride. It has been found that a thin diffusion barrier of iron, molybdenum or tungsten will prevent this degradation.
Inventors
- 👤 Louis F Kendall Jr
- 👤 James H Bredt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:58
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/80; H10N10/81; H10N10/817; Y; Y10; Y10S; Y10S257/00; Y10S257/93
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
21 words
A thermoelectric generator element according to claim 1 wherein said support member is composed of an AISI Type 300 stainless steel.
Claim 2
Dependent Claim
15 words
The thermoelectric generator element according to claim 2 wherein said layer is composed of iron.
Claim 3
Dependent Claim
15 words
The thermoelectric generator element according to claim 2 wherein said layer is composed of molybdenum.
Claim 4
Dependent Claim
15 words
The thermoelectric generator element according to claim 2 wherein said layer is composed of tungsten.
Claim 5
Dependent Claim
25 words
The thermoelectric generator element according to claim 2 wherein said first surface is joined to said layer by means of a thin telluride brazed joint.
References Cited (Backward Citations)
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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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |