Method of producing improved microstructure and properties for ceramic superconductors
Patent
·
OSTI ID:242588
A ceramic superconductor is produced by close control of oxygen partial pressure during sintering of the material. The resulting microstructure of YBa{sub 2}Cu{sub 3}O{sub x} indicates that sintering kinetics are enhanced at reduced p(O{sub 2}). The density of specimens sintered at 910 C increased from 79 to 94% theoretical when p(O{sub 2}) was decreased from 0.1 to 0.0001 MPa. The increase in density with decrease in p(O{sub 2}) derives from enhanced sintering kinetics, due to increased defect concentration and decreased activation energy of the rate-controlling species undergoing diffusion. Sintering at 910 C resulted in a fine-grain microstructure, with an average grain size of approximately 4 {micro}m. Such a microstructure results in reduced microcracking, strengths as high as 191 MPa and high critical current density capacity. 20 figs.
- Research Organization:
- University of Chicago
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- Univ. of Chicago, IL (United States)
- Patent Number(s):
- US 5,525,586/A/
- Application Number:
- PAN: 8-306,927
- OSTI ID:
- 242588
- Country of Publication:
- United States
- Language:
- English
Similar Records
Method of producing improved microstructure and properties for ceramic superconductors
Role of p sub O sub 2 in microstructural development and properties of YBa sub 2 Cu sub 3 O sub x superconductors
Method of manufacture of single phase ceramic superconductors
Patent
·
Sun Dec 31 23:00:00 EST 1995
·
OSTI ID:870456
Role of p sub O sub 2 in microstructural development and properties of YBa sub 2 Cu sub 3 O sub x superconductors
Journal Article
·
Tue Sep 01 00:00:00 EDT 1992
· Journal of Materials Research; (United States)
·
OSTI ID:6959830
Method of manufacture of single phase ceramic superconductors
Patent
·
Mon Mar 27 23:00:00 EST 1995
·
OSTI ID:35077