Quentin Robinson

US Patent:

52739562, Dec 28, 1993

Filed:

Jul 14, 1988

Appl. No.:

7/219094

Inventors:

D. Lynn Johnson - Wilmette IL
Quentin K. Robinson - Chicago IL

Assignee:

Northwestern University - Evanston IL

International Classification:

H01L 3900

US Classification:

505 1

Abstract:

Textured, dense, polycrystalline ceramic bodies are produced by a sinter-compression process which exhibit anisotropic superconducting properties. The bodies are produced from low density aggregates of crystalline particles by applying compressive forces to two opposed faces while permitting the aggregate to expand perpendicularly to the axis of compression. This produces a microcrystalline structure predominately composed of elongated platelike grains having their broad faces generally aligned with the body faces to which the compression was applied. The resulting bodies exhibit room temperature conductivity several times greater in a direction parallel to their compression faces than perpendicular thereto.