STABLE CONDUCTIVE CONTACTS TO HIGH TC SUPERCONDUCTING OXIDES

Award Information
Agency: National Science Foundation
Branch: N/A
Contract: N/A
Agency Tracking Number: 7588
Amount: $50,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1988
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Spire Corp
Patriots Park, Bedford, MA, 01730
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 ANTON GREENWALD
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract
PRACTICAL APPLICATIONS OF SUPERCONDUCTORS REQUIRES WIRES SURROUNDED BY NORMAL GOOD CONDUCTING MATERIALS FOR STABILITYIN CASES WHEN TEMPERATURES RISE ABOVE TC. EXISTING FABRICATION PROCEDURES FOR THE NEW SUPERCONDUCTING OXIDES (SUCH AS YBA2CU3O7) REQUIRE SINTERING STEPS AT ELEVATED TEMPERATURES MAKING COPPER-SUPERCONDUCTING COMPOSITE CABLE IMPRACTICLE. THE PROPOSED RESEARCH COULD LEAD TO THE DEVELOPMENT OF MULTILAYER STRUCTURES (METAL-TRANSITION LAYER-SUPERCONDUCTOR) WHICH ARE STABLE DURING SINTERING AT 900 DEGREES C AND MAINTAIN LOW CONTACT RESISTANCE TO THE SUPERCONDUCTOR THROUGH MULTIPLE TEMPERATURE CYCLES ABOVE AND BELOW TC. CONDUCTING COMPOUNDS WHICH ARE STABLE IN OXIDIZING AMBIENTS ARE CANDIDATES FOR THE TRANSITION LAYER. SPECIFIC SUGGESTED CONDUCTING COMPOUNDS WILL BE APPLIED TO APPROPRIATE SUBSTRATES. SUPERCONDUCTING OXIDES WILL BE DEPOSITED ON THESE SAMPLES BY SCREEN PRINTING, THEN SINTEREDAT HIGH TEMPERATURE. SAMPLES WILL BE TESTED FOR ELECTRICAL CONTINUITY BETWEEN LAYERS AT HIGH AND LOW TEMPERATURES. EXPERIMENTAL AND THEORETICAL ANALYSIS OF THE CHEMISTRY AND PHYSICS OF THE INTERFACE WILL BE MADE TO GUIDE PHASE II RESEARCH TO IMPROVE THE TRANSITION LAYER BETWEEN METALS AND THE NEW SUPERCONDUCTOR.

* information listed above is at the time of submission.

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