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

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: N/A
Agency Tracking Number: 17050
Amount: $490,660.00
Phase: Phase II
Program: SBIR
Awards Year: 1992
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
101451 Vista Park Rd, Dallas, TX, 75238
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 () -
Business Contact
Phone: () -
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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