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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{minus}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. 7 figs.
Inventors:
; ; ;
Issue Date:
OSTI Identifier:
672594
Assignee:
Univ. of Chicago, IL (United States) PTO; SCA: 360201; PA: EDB-98:119797; SN: 98002024853
Patent Number(s):
US 5,776,864/A/
Application Number:
PAN: 8-834,687; TRN: 99:001060
Contract Number:
W-31109-ENG-38
Resource Relation:
Other Information: PBD: 7 Jul 1998
Research Org:
Univ. of Chicago, IL (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; YTTRIUM OXIDES; BARIUM OXIDES; COPPER OXIDES; CRYSTAL GROWTH; FABRICATION; HEATING; PRECURSOR; NEODYMIUM OXIDES