Synthesis of YBa2CU3O7 using sub-atmospheric processing
Abstract
The present invention is a method of forming thick films of crystalline YBa.sub.2 Cu.sub.3 O.sub.7 that includes forming a precursor film comprising barium fluoride (BaF.sub.2), yttrium (Y) and copper (Cu). The precursor film is heat-treated at a temperature above 500.degree. C. in the presence of oxygen, nitrogen and water vapor at sub-atmospheric pressure to form a crystalline structure. The crystalline structure is then annealed at about 500.degree. C. in the presence of oxygen to form the crystalline YBa.sub.2 Cu.sub.3 O.sub.7 film. The YBa.sub.2 Cu.sub.3 O.sub.7 film formed by this method has a resistivity of from about 100 to about 600 .mu.Ohm-cm at room temperature and a critical current density measured at 77 K in a magnetic field of 1 Tesla of about 1.0.times.10.sup.5 Ampere per square centimeter (0.1 MA/cm.sup.2) or greater.
- Inventors:
- Issue Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1175049
- Patent Number(s):
- 6794339
- Application Number:
- 09/950,888
- Assignee:
- Brookhaven Science Associates (Upton, NY)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL
- DOE Contract Number:
- AC02-98CH10886
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Wiesmann, Harold, and Solovyov, Vyacheslav. Synthesis of YBa2CU3O7 using sub-atmospheric processing. United States: N. p., 2004.
Web.
Wiesmann, Harold, & Solovyov, Vyacheslav. Synthesis of YBa2CU3O7 using sub-atmospheric processing. United States.
Wiesmann, Harold, and Solovyov, Vyacheslav. Tue .
"Synthesis of YBa2CU3O7 using sub-atmospheric processing". United States. https://www.osti.gov/servlets/purl/1175049.
@article{osti_1175049,
title = {Synthesis of YBa2CU3O7 using sub-atmospheric processing},
author = {Wiesmann, Harold and Solovyov, Vyacheslav},
abstractNote = {The present invention is a method of forming thick films of crystalline YBa.sub.2 Cu.sub.3 O.sub.7 that includes forming a precursor film comprising barium fluoride (BaF.sub.2), yttrium (Y) and copper (Cu). The precursor film is heat-treated at a temperature above 500.degree. C. in the presence of oxygen, nitrogen and water vapor at sub-atmospheric pressure to form a crystalline structure. The crystalline structure is then annealed at about 500.degree. C. in the presence of oxygen to form the crystalline YBa.sub.2 Cu.sub.3 O.sub.7 film. The YBa.sub.2 Cu.sub.3 O.sub.7 film formed by this method has a resistivity of from about 100 to about 600 .mu.Ohm-cm at room temperature and a critical current density measured at 77 K in a magnetic field of 1 Tesla of about 1.0.times.10.sup.5 Ampere per square centimeter (0.1 MA/cm.sup.2) or greater.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 21 00:00:00 EDT 2004},
month = {Tue Sep 21 00:00:00 EDT 2004}
}
Works referenced in this record:
Ex-situ post-deposition processing for large area Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7/ films and coated tapes
journal, March 2001
- Solovyov, V. F.; Wiesmann, H. J.; Wu, Li-jun
- IEEE Transactions on Appiled Superconductivity, Vol. 11, Issue 1, p. 2939-2942