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US5316858A
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Materials for thermoelectric and light-heat conversion
Assignee: Sharp Corp
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Filing: 1992-08-03
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Granted: 1994-05-31
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Expires: 2012-08-03
Abstract
Abstract The disclosure is directed to a method for converting between heat energy and electric energy which is characterized in that a carbon intercalation compound is employed as a thermoelectric material by utilizing a temperature difference in a direction perpendicular to the structure of carbon layers, or a method for producing a light-heat converting material which is characterized in that a thin metallic layer like a translucent mirror is caused to adhere to the inner surface of a light transmissive hollow tube by pyrolytically decomposing at a temperature approximately below 1000° C., with hydrocarbons being introduced into the hollow tube at the rate of a predetermined amount per hour.
Inventors
- 👤 Yoshiyuki Higashigaki
- 👤 Yoshikazu Yoshimoto
- 👤 Tomonari Suzuki
- 👤 Shigeo Nakajima
- 👤 Toshio Inoguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:01
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/01; H10N10/80; H10N10/85; H10N10/851; H10N10/855; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/30; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
94 words
A material for converting heat energy to electric energy consisting essentially of: graphite layers having atoms of a heavy metal intercalated between the adjoining graphite layers, said heavy metal being an element selected from the group consisting of bismuth, lead, antimony, tin and mercury, wherein the thermoelectric power of the intercalated heavy metal atoms in the direction perpendicular to the graphite layers of said material is α=150-50 μVK -1 and the conductivity and the thermal conductivity of said material are σ=5100-1200 Ω -1 cm -1 and κ=1.1-2.1×10 -2 W·cm -1 ·K -1 , respectively.
Claim 2
Dependent Claim
94 words
A material for converting heat energy to electric energy consisting essentially of: graphite layers having atoms of a heavy metal intercalated between the adjoining graphite layers, said heavy metal being an element selected from the group consisting of bismuth, lead, antimony, tin and mercury, wherein the thermoelectric power of the intercalated heavy metal atoms in the direction perpendicular to the graphite layers of said material is α=150-50 μVK -1 and the conductivity and the thermal conductivity of said material are σ=5100-1200 Ω -1 cm -1 and κ=1.1-2.1×10 -2 W·cm -1 ·K -1 , respectively.
Claim 3
Dependent Claim
22 words
The material according to claim 1, wherein said heavy metal is an element selected from the group consisting of bismuth and antimony.
Claim 4
Dependent Claim
150 words
A material produced by simultaneously introducing a hydrocarbon or 1,2-dibromoethylene and an organometal reagent, in which the metal comprised therein is a heavy metal, into a reaction tube at the rate of a predetermined amount per hour and by pyrolytically decomposing said hydrocarbon compound or 1,2-dibromoethylene and said organometal reagent at a temperature of approximately 1000° C. and for converting heat energy to electric energy consisting essentially of: graphite layers having atoms of a heavy metal intercalated between the adjoining graphite layers, said heavy metal being an element selected from the group consisting of bismuth, lead, antimony, tin and mercury, wherein the thermoelectric power of the intercalated heavy metal atoms in the direction perpendicular to the graphite layers of said material is α=150-50 μV -1 and the conductivity and the thermal conductivity of said material are σ=5100-1200 Ω -1 cm -1 and κ=1.1-2.1×10 -2 W·cm -1 ·K -1 , respectively.
Claim 5
Dependent Claim
150 words
A material produced by simultaneously introducing a hydrocarbon or 1,2-dibromoethylene and an organometal reagent, in which the metal comprised therein is a heavy metal, into a reaction tube at the rate of a predetermined amount per hour and by pyrolytically decomposing said hydrocarbon compound or 1,2-dibromoethylene and said organometal reagent at a temperature of approximately 1000° C. and for converting heat energy to electric energy consisting essentially of: graphite layers having atoms of a heavy metal intercalated between the adjoining graphite layers, said heavy metal being an element selected from the group consisting of bismuth, lead, antimony, tin and mercury, wherein the thermoelectric power of the intercalated heavy metal atoms in the direction perpendicular to the graphite layers of said material is α=150-50 μV -1 and the conductivity and the thermal conductivity of said material are σ=5100-1200 Ω -1 cm -1 and κ=1.1-2.1×10 -2 W·cm -1 ·K -1 , respectively.
References Cited (Backward Citations)
US2946835A
Cited
GB901177A
Cited
US3330703A
Cited
US3434888A
Cited
US4388227A
Cited
US4465895A
Cited
US4701317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-30 | 1997-11-29 | 1998-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-30 | 2001-11-29 | 2002-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-30 | 2005-11-29 | 2006-05-31 | $7700.00 | Window Closed / Lapsed |