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

Patent · Tue Jul 07 04:00:00 EDT 1998

OSTI ID:672594

Todt, V; Miller, D J; Shi, D; Sengupta, S

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.

• Research Organization: University of Chicago
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• Assignee: Univ. of Chicago, IL (United States)
• Patent Number(s): US 5,776,864/A/
• Application Number: PAN: 8-834,687
• OSTI ID: 672594
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COPPER OXIDES
CRYSTAL GROWTH
FABRICATION
HEATING
NEODYMIUM OXIDES
PRECURSOR
YTTRIUM OXIDES