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

Patent ·
OSTI ID:871685
 [1];  [2];  [3];  [4]
  1. Lemont, IL
  2. Darien, IL
  3. Oak Park, OH
  4. Columbus, OH
+ Show Author Affiliations

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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL
DOE Contract Number:
W-31109-ENG-38
Assignee:
University of Chicago (Chicago, IL)
Patent Number(s):
US 5776864
OSTI ID:
871685
Country of Publication:
United States
Language:
English

References (2)

Processing of large YBa2 Cu3Ox domains for levitation applications by a Nd1+x Ba2−x Cu3 Oy-Seeded melt-growth technique journal November 1994
Critical Current Densities in Superconducting Y-Ba-Cu-O Prepared by the Quench-and-Melt Growth Technique journal September 1989

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/505/23/252/423/
123
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barium
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bulk
carbonates
compressed
compressed powder
cooled
copper
copper oxide
crack-free
crystal
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cu
cube
domain
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earth
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rare
rare earth
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seeding
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single domain
slowly
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yba