N-TYPE BORON-CARBON BASED ALLOYS

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$50,000.00
Award Year:
1989
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
10878
Agency Tracking Number:
10878
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
11180 Roselle St #g, San Diego, CA, 92121
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Mr Norbert B Elsner
Principal Investigator
(619) 535-9343
Business Contact:
() -
Research Institution:
n/a
Abstract
P-TYPE BORON-CARBON (B-C) ALLOYS OVER THE SINGLE-PHASE REGION B9C TO B4C EXHIBIT VERY UNUSUAL SEMICONDUCTOR PROPERTIES. FOR EXAMPLE, BOTH THE SEEBECK COEFFICIENT AND ELECTRICAL CONDUCTIVITY INCREASE WITH TEMPERATURE, MAKING THESE ALLOYS ATTRACTIVE FOR THERMOELECTRIC ENERGY CONVERSION. IT APPEARS THAT B-C ALLOYS DO NOT EXHIBIT A MAXIMUM IN FIGURE-OF-MERIT (Z) WITH INCREASING TEMPERATURE. SINCE THE HIGHEST REPORTED Z OF B-C ALLOYS AT 1,000 DEGREES CENTIGRADE IS 0.85 X 10(-3) DEGREES CENTIGRADE, THERE IS REASON TO BELIEVE A Z OF >1.2 X 10(-3) AT 1,200 DEGREES CENTIGRADE IS ACHIEVABLE. MANY LABORATORIES ARE ACTIVELY WORKING ON B-C AND OTHER ALLOYS. IT IS EXPECTED THAT THESE P-TYPE ALLOYS WILL BE IMPROVED FURTHER IN THEIR Z VALUES. THIS PROGRAM SEEKS TO DEVELOP THE COMPANION N-TYPE MATERIAL BASED ON B-C ALLOYS. PRESENTLY, NO VIABLE CANDIDATES WITH ASIMILAR THERMAL EXPANSION AND EQUIVALENT THERMAL STABILITY ARE KNOWN. BASED ON PRIOR STUDIES OF B-C ALLOYS WITH A VARIETY OF ADDITIVES, A MODEL HAS BEEN DEVELOPED THAT INDICATES WHICH B-C BASED COMPOSITIONS SHOULD BE PURSUED. P-TYPE B-C, AS WELL AS OTHER POTENTIAL BORIDES (B12A1, GDB66, B12AS, B13P2, ETC.), ARE EXPECTED TO BENEFIT FROM THIS WORK.

* information listed above is at the time of submission.

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