Seed crystals with improved properties for melt processing superconductors for practical applications
Abstract
A method of fabricating bulk superconducting material is disclosed including RBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} comprising heating compressed powder oxides and/or carbonates of R and Ba and Cu present in mole ratios to form RBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} in physical contact with an oxide single crystal seed to a temperature sufficient to form a liquid phase in the RBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} while maintaining the single crystal seed solid to grow the superconducting material and thereafter cooling to provide a material including RBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}. R is a rare earth or Y or La and the single crystal seed has a lattice mismatch with RBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} of less than about 2% at the growth temperature. The starting material may be such that the final product contains a minor amount of R{sub 2}BaCuO{sub 5}.
- Inventors:
- Issue Date:
- Research Org.:
- Univ. of Chicago, IL (United States)
- OSTI Identifier:
- 458588
- Patent Number(s):
- 5611854
- Application Number:
- PAN: 8-531,399; TRN: 97:006793
- Assignee:
- Univ. of Chicago, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 18 Mar 1997
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; COPPER OXIDES; BARIUM OXIDES; YTTRIUM OXIDES; LANTHANUM OXIDES; SYNTHESIS; HIGH-TC SUPERCONDUCTORS
Citation Formats
Veal, B W, Paulikas, A, Balachandran, U, and Zhong, W. Seed crystals with improved properties for melt processing superconductors for practical applications. United States: N. p., 1997.
Web.
Veal, B W, Paulikas, A, Balachandran, U, & Zhong, W. Seed crystals with improved properties for melt processing superconductors for practical applications. United States.
Veal, B W, Paulikas, A, Balachandran, U, and Zhong, W. Tue .
"Seed crystals with improved properties for melt processing superconductors for practical applications". United States.
@article{osti_458588,
title = {Seed crystals with improved properties for melt processing superconductors for practical applications},
author = {Veal, B W and Paulikas, A and Balachandran, U and Zhong, W},
abstractNote = {A method of fabricating bulk superconducting material is disclosed including RBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} comprising heating compressed powder oxides and/or carbonates of R and Ba and Cu present in mole ratios to form RBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} in physical contact with an oxide single crystal seed to a temperature sufficient to form a liquid phase in the RBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} while maintaining the single crystal seed solid to grow the superconducting material and thereafter cooling to provide a material including RBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}. R is a rare earth or Y or La and the single crystal seed has a lattice mismatch with RBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} of less than about 2% at the growth temperature. The starting material may be such that the final product contains a minor amount of R{sub 2}BaCuO{sub 5}.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 18 00:00:00 EST 1997},
month = {Tue Mar 18 00:00:00 EST 1997}
}