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

Patent · Tue Jul 07 00:00:00 EDT 1998

OSTI ID:871685

Todt, Volker ^[1]; Miller, Dean J ^[2]; Shi, Donglu ^[3]; Sengupta, Suvankar ^[4]

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1. Lemont, IL
2. Darien, IL
3. Oak Park, OH
4. Columbus, OH

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 (United States)
• 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

Related Subjects

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/