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Title: 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):
5,611,854
Application Number:
PAN: 8-531,399; TRN: 97:006793
Assignee:
Univ. of Chicago, IL (United States) PTO; SCA: 360201; PA: EDB-97:055590; SN: 97001758992
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 = {1997},
month = {3}
}