The effect of lead content on the critical current density, irreversibility field, and microstructure of Ag-clad Bi{sub 1.8}Pb{sub x}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub y} tapes
Journal Article
·
· Journal of Materials Research
- Applied Superconductivity Center and Materials Science Program, University of Wisconsin-Madison, 1500 Engineering Drive, Madison, Wisconsin 53706 (United States)
- Energy Technology Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
We studied the effect of lead content (xthinsp=thinsp0.20{endash}0.40) on the critical current density J{sub c}(0&hthinsp;T,77 K), irreversibility field H{sup {asterisk}}(77 K), and microstructure of monocore, Ag-clad Bi{sub 1.8}Pb{sub x}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub y} (2223) tapes, finding that tapes with lower lead contents (xthinsp=thinsp0.20{endash}0.25) required higher processing temperatures (840 and 832&hthinsp;{degree}C, respectively) to complete 2223 formation, as compared to the optimum 820&hthinsp;{degree}C reaction temperature of the xthinsp=thinsp0.30{endash}0.40 tapes. We found that both the zero-field and the in-field properties correlated strongly to the phase purity with J{sub c}(0&hthinsp;T,77 K) reaching a maximum of {approximately}20 kA/cm{sup 2} for x=0.30, and then decreasing with increasing lead content to {approximately}12 kA/cm{sup 2} for x=0.40. H{sup {asterisk}}(77 K) increased from {approximately}165 mT at xthinsp=thinsp0.20 to {approximately}265 mT at xthinsp=thinsp0.30, then declined to 195 mT at xthinsp=thinsp0.40. Optimizing the lead content at xthinsp=thinsp0.30 maximized both the connectivity and the flux pinning contributions to the critical current density. {copyright} {ital 1999 Materials Research Society.}
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 341167
- Journal Information:
- Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 2 Vol. 14; ISSN JMREEE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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The use of the in-field critical current density, J[sub c](0. 1 T), as a better descriptor of (Bi, Pb)[sub 2]Sr[sub 2]Ca[sub 2]Cu[sub 3]O[sub x]/Ag tape performance
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Sun Oct 31 23:00:00 EST 1999
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Related Subjects
36 MATERIALS SCIENCE
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
HIGH-TC SUPERCONDUCTORS
LEAD COMPOUNDS
LEAD OXIDES
MAGNETIC FLUX
MAGNETIC PROPERTIES
MICROSTRUCTURE
OXYGEN COMPOUNDS
SILVER
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING COMPOSITES
TEMPERATURE DEPENDENCE
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
HIGH-TC SUPERCONDUCTORS
LEAD COMPOUNDS
LEAD OXIDES
MAGNETIC FLUX
MAGNETIC PROPERTIES
MICROSTRUCTURE
OXYGEN COMPOUNDS
SILVER
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING COMPOSITES
TEMPERATURE DEPENDENCE