Accession Number:

ADA230074

Title:

High-Temperature Ceramic Superconductors

Descriptive Note:

Annual rept. 1 Oct 1989-30 Sep 1990,

Corporate Author:

GENERAL ATOMICS SAN DIEGO CA

Personal Author(s):

• Mazdiyasni, K. S.

Report Date:

1990-11-15

Pagination or Media Count:

89.0

Abstract:

The principal goals of this program are 1 to demonstrate fabrication of high-temperature ceramic superconductors via sol-gel method that can operate at or above 90K with appropriate current density, J sub c, in forms useful for application in resonant cavities, magnets, motors, sensors, computers, and other devices and 2 to fabricate and demonstrate selected components made of these materials, including microwave cavities and magnetic shields. Chemical pathways for synthesis of 123 identified, process parameters window for sol-gel derived 123 fibers established, continuous flexible fibers 15-200 microns in diameter producted, fibers with T sub c approx.92.5 K, Delta T1.5 K, J sub c 2000 Asqcm at 77 K, 0 field 4000 at 57K, 100 Oe was produced, formed adherent 123 oriented films on metals and ceramic substrates, achieved film T sub c approx.92 K, Delta T 4 K, J sub c 400 Asqcm at 40 K, 0 field.

Descriptors:

• *METALS
• DETECTORS
• COMPUTERS
• HIGH TEMPERATURE
• SUPERCONDUCTORS
• MAGNETS
• MICROWAVES
• SUBSTRATES
• CAVITIES
• CERAMIC MATERIALS
• RESONANCE
• SHIELDING
• MAGNETIC FIELDS
• CURRENT DENSITY

Subject Categories:

• Ceramics, Refractories and Glass
• Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE