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Title: Large single domain 123 material produced by seeding with single crystal rare earth barium copper oxide single crystals

A method of fabricating bulk YBa.sub.2 Cu.sub.3 O.sub.x where compressed powder oxides and/or carbonates of Y and Ba and Cu present in mole ratios to form YBa.sub.2 Cu.sub.3 O.sub.x are heated in the presence of a Nd.sub.1+x Ba.sub.2-x Cu.sub.3 O.sub.y seed crystal to a temperature sufficient to form a liquid phase in the YBa.sub.2 Cu.sub.3 O.sub.x while maintaining the seed crystal solid. The materials are slowly cooled to provide a YBa.sub.2 Cu.sub.3 O.sub.x material having a predetermined number of domains between 1 and 5. Crack-free single domain materials can be formed using either plate shaped seed crystals or cube shaped seed crystals with a pedestal of preferential orientation material.
Inventors:
 [1];  [2];  [3];  [4]
  1. (Lemont, IL)
  2. (Darien, IL)
  3. (Oak Park, OH)
  4. (Columbus, OH)
Issue Date:
OSTI Identifier:
871685
Assignee:
University of Chicago (Chicago, IL) ANL
Patent Number(s):
US 5776864
Contract Number:
W-31109-ENG-38
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
Language:
English
Subject:
single; domain; 123; material; produced; seeding; crystal; rare; earth; barium; copper; oxide; crystals; method; fabricating; bulk; yba; cu; compressed; powder; oxides; carbonates; mole; ratios; form; heated; presence; 2-x; seed; temperature; sufficient; liquid; phase; maintaining; solid; materials; slowly; cooled; provide; predetermined; domains; crack-free; formed; plate; shaped; cube; pedestal; preferential; orientation; seed crystals; material produced; seed crystal; preferential orientation; copper oxide; liquid phase; rare earth; single crystal; temperature sufficient; single crystals; mole ratio; single domain; barium copper; powder oxides; oxide single; mole ratios; compressed powder; fabricating bulk; earth barium; /505/23/252/423/

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