USING PRESSED AND SINTERED BI-SB TO IMPROVE THERMOELECTRIC COOLERS BELOW 200K

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$490,660.00
Award Year:
1992
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Agency Tracking Number:
17050
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Marlow Industries Inc.
101451 Vista Park Rd, Dallas, TX, 75238
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
() -
Business Contact:
() -
Research Institution:
n/a
Abstract
THIS PROJECT LAYS THE FOUNDATION FOR THE DEVELOPMENT OF A PRACTICAL THERMOELECTRIC COOLER THAT WILL OBTAIN COLDER TEMPERATURES THAN 160K AND/OR HIGHER EFFICIENCIES THAN CURRENT COOLERS WHEN OPERATING BELOW 200K. THE IMPROVED THERMOELECTRIC COOLER WOULD USE N-TYPE BI-SB, PRODUCED THROUGH POWDER METALLURGY, IN THE STAGES OPERATING BELOW 220K. THIS WORK WOULD BE A DEPARTURE FROM TRADITIONAL BI-SBRESEARCH, WHICH HAS CONCENTRATED ON THE PRODUCTION OF SINGLE-CRYSTAL MATERIALS. PHASE I WILL DEMONSTRATE THE FEASIBILITY OF DEVELOPING N-TYPE BI-SB THROUGH POWDER METALLURGY, WHICH OFFERS MYRIAD ADVANTAGES OVER CONVENTIONAL, SINGLE-CRYSTAL BI-SB. BI-SB THAT IS DEVELOPEDTHROUGH POWDER METALLURGY IS EASIER TO PRODUCE, DIMENSION, AND HANDLE THAN SINGLE CRYSTAL BI-SB. THE FINE-GRAINED MICROSTRUCTURE PRODUCED BY POWDER METALLURGY ALSO ELIMINATESTHE DANGER OF CATASTROPHIC FAILURE DUE TO CLEAVAGE, A SERIOUS PROBLEM WITH SINGLE-CRYSTAL BI-SB. WHEN SUCCESSFULLY PRODUCED, N-TYPE BI-SB WILL BE INCORPORATED INTO THERMOELECTRIC COOLERS, RESULTING IN LOWER OPERATING TEMPERATURE CAPABILITIES AND HIGHER EFFICIENCIES. THIS PROJECT LAYS THE FOUNDATION FOR THE DEVELOPMENT OF A PRACTICAL THERMOELECTRIC COOLER THAT WILL OBTAIN COLDER TEMPERATURES THAN 160K AND/OR HIGHER EFFICIENCIES THAN CURRENT COOLERS WHEN OPERATING BELOW 200K. THE IMPROVED THERMOELECTRIC COOLER WOULD USE N-TYPE BI-SB, PRODUCED THROUGH POWDER METALLURGY, IN THE STAGES OPERATING BELOW 220K. THIS WORK WOULD BE A DEPARTURE FROM TRADITIONAL BI-SBRESEARCH, WHICH HAS CONCENTRATED ON THE PRODUCTION OF SINGLE-CRYSTAL MATERIALS. PHASE I WILL DEMONSTRATE THE FEASIBILITY OF DEVELOPING N-TYPE BI-SB THROUGH POWDER METALLURGY, WHICH OFFERS MYRIAD ADVANTAGES OVER CONVENTIONAL, SINGLE-CRYSTAL BI-SB. BI-SB THAT IS DEVELOPEDTHROUGH POWDER METALLURGY IS EASIER TO PRODUCE, DIMENSION, AND HANDLE THAN SINGLE CRYSTAL BI-SB. THE FINE-GRAINED MICROSTRUCTURE PRODUCED BY POWDER METALLURGY ALSO ELIMINATESTHE DANGER OF CATASTROPHIC FAILURE DUE TO CLEAVAGE, A SERIOUS PROBLEM WITH SINGLE-CRYSTAL BI-SB. WHEN SUCCESSFULLY PRODUCED, N-TYPE BI-SB WILL BE INCORPORATED INTO THERMOELECTRIC COOLERS, RESULTING IN LOWER OPERATING TEMPERATURE CAPABILITIES AND HIGHER EFFICIENCIES.

* information listed above is at the time of submission.

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