Flux pinning by precipitates in the Bi-Sr-Ca-Cu-O system
Patent
·
OSTI ID:868299
- Chicago, IL
A fundamental pinning mechanism has been identified in the Bi-Sr-Ca-Cu-O system. The pinning strength has been greatly increased by the introduction of calcium- and copper-rich precipitates into the sample matrix. The calcium and copper are supersaturated in the system by complete melting, and the fine calcium and copper particles precipitated during subsequent crystallization anneal to obtain the superconducting phases. The intragrain critical current density has been increased from the order of 10.sup.5 A/cm.sup.2 to 10.sup.7 A/cm.sup.2 at 5 T.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- United States of America as represented by Department of Energy (Washington, DC)
- Patent Number(s):
- US 5114909
- OSTI ID:
- 868299
- Country of Publication:
- United States
- Language:
- English
110 k superconductivity in crystallized Bi-Sr-Ca-Cu-O glasses
|
journal | December 1988 |
Flux pinning by precipitates in the Bi-Sr-Ca-Cu-O system
|
journal | September 1989 |
Formation of the 110-K superconducting phase via the amorphous state in the Bi-Sr-Ca-Cu-O system
|
journal | May 1989 |
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·
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·
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Related Subjects
/505/252/501/
10
anneal
bi-sr-ca-cu-o
calcium
calcium-
cm
complete
copper
copper-rich
critical
critical current
crystallization
current
current density
density
fine
fine calcium
flux
flux pinning
fundamental
greatly
greatly increase
greatly increased
identified
increased
intragrain
introduction
matrix
mechanism
melting
obtain
particles
phases
pinning
precipitated
precipitates
sample
strength
subsequent
superconducting
superconducting phase
supersaturated
10
anneal
bi-sr-ca-cu-o
calcium
calcium-
cm
complete
copper
copper-rich
critical
critical current
crystallization
current
current density
density
fine
fine calcium
flux
flux pinning
fundamental
greatly
greatly increase
greatly increased
identified
increased
intragrain
introduction
matrix
mechanism
melting
obtain
particles
phases
pinning
precipitated
precipitates
sample
strength
subsequent
superconducting
superconducting phase
supersaturated