High-Tc superconducting ceramic oxide products and macroscopic and microscopic methods of making the same

Patent · Tue Jun 15 00:00:00 EDT 1993

OSTI ID:6184414

Zbou, D

A method of making a high-Tc superconducting product useful as a high-Tc superconducting magnet is described comprising a continuous close loop and having zero electrical resistance in said continuous closed loop, said method comprising the steps of: providing a first hollow body of a material inert to oxygen; providing a second hollow body of a material inert to oxygen; pressing a high-Tc superconducting ceramic oxide powder into said first hollow body and said second hollow body; and then joining said first hollow body with said high-Tc superconducting ceramic oxide powder pressed therein to said second hollow body having said high-Tc superconducting ceramic oxide powder pressed therein, thereby forming a continuous loop defined within said first and second hollow bodies; and then repressing said high-Tc superconducting ceramic oxide powder in the joined first and second hollow bodies thereby making a continuous connection through the joints at which said first and second hollow bodies are joined; and then heat treating the joined first and second hollow bodies with the pressed high-Tc superconducting ceramic oxide powder therein, with an end of at least one of said first and said second hollow bodies being open, the heat treating being conducted in an oxygen atmosphere at sufficient temperatures and for time periods such that the high-Tc superconducting ceramic oxide powder is sintered annealed, and cooled; and then sealing the open end of said at least one of said first and said second hollow bodies, thereby preventing oxygen loss; wherein the step of heat treating the joined first and second hollow bodies is the only heating of the pressed high-Tc superconducting ceramic oxide powder and the high-Tc superconducting ceramic oxide powder pressed in the first and second hollow bodies is not heated prior to joining the first and second hollow bodies.

• Assignee: IMS; EDB-93-101291
• Patent Number(s): US 5219832; A
• Application Number: PPN: US 7-716929
• OSTI ID: 6184414
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CERAMICS
ELECTRIC CONDUCTIVITY
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTROMAGNETS
EQUIPMENT
FABRICATION
HEAT TREATMENTS
HIGH-TC SUPERCONDUCTORS
MAGNETS
PHYSICAL PROPERTIES
SINTERING
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS
SUPERCONDUCTORS