Enhancement of transport critical current density in nano Cr 2O3 added Ag-sheathed (Bi1.6Pb 0.4)Sr2Ca2Cu3O10 superconductor tapes

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Abstract

Ag-sheathed (Bi1.6Pb0.4)Sr2Ca 2Cu3O10 (Bi-2223) high temperature superconductor tapes with 0.1 wt% nano Cr2O3 were fabricated using the powder-in-tube method. The effects of intermediate rolling and sintering temperature on the transport critical current density (J c) under self-field and applied magnetic field were studied. The X-ray patterns showed a dominant Bi-2223 phase (∼80%). A decrease in J c in applied magnetic field, parallel or perpendicular to the sample wide surface was observed for all tapes. Intermediate rolling improved the self-field Jc (T=77 K) of the tapes by 25%. Both Jc versus applied field curves and normalized pinning force density Fp/F pmax versus applied field curves showed that the pinning strength was significantly enhanced with thermo-mechanical treatments. SEM micrographs showed improvements in the grain alignment of tapes with intermediate rolling. Enhancement in Jc was observed in the nano Cr2O 3 added tapes.

Original languageEnglish
Pages (from-to)5625-5634
Number of pages10
JournalInternational Journal of Modern Physics B
Volume24
Issue number28
DOIs
Publication statusPublished - 10 Nov 2010

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tapes
critical current
current density
augmentation
thermomechanical treatment
curves
magnetic fields
high temperature superconductors
sintering
alignment
tubes
scanning electron microscopy
x rays
temperature

Keywords

  • Current density
  • flux pinning
  • nanometric CrO

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Statistical and Nonlinear Physics

Cite this

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title = "Enhancement of transport critical current density in nano Cr 2O3 added Ag-sheathed (Bi1.6Pb 0.4)Sr2Ca2Cu3O10 superconductor tapes",
abstract = "Ag-sheathed (Bi1.6Pb0.4)Sr2Ca 2Cu3O10 (Bi-2223) high temperature superconductor tapes with 0.1 wt{\%} nano Cr2O3 were fabricated using the powder-in-tube method. The effects of intermediate rolling and sintering temperature on the transport critical current density (J c) under self-field and applied magnetic field were studied. The X-ray patterns showed a dominant Bi-2223 phase (∼80{\%}). A decrease in J c in applied magnetic field, parallel or perpendicular to the sample wide surface was observed for all tapes. Intermediate rolling improved the self-field Jc (T=77 K) of the tapes by 25{\%}. Both Jc versus applied field curves and normalized pinning force density Fp/F pmax versus applied field curves showed that the pinning strength was significantly enhanced with thermo-mechanical treatments. SEM micrographs showed improvements in the grain alignment of tapes with intermediate rolling. Enhancement in Jc was observed in the nano Cr2O 3 added tapes.",
keywords = "Current density, flux pinning, nanometric CrO",
author = "W. Kong and {Abd. Shukor}, Roslan",
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AU - Kong, W.

AU - Abd. Shukor, Roslan

PY - 2010/11/10

Y1 - 2010/11/10

N2 - Ag-sheathed (Bi1.6Pb0.4)Sr2Ca 2Cu3O10 (Bi-2223) high temperature superconductor tapes with 0.1 wt% nano Cr2O3 were fabricated using the powder-in-tube method. The effects of intermediate rolling and sintering temperature on the transport critical current density (J c) under self-field and applied magnetic field were studied. The X-ray patterns showed a dominant Bi-2223 phase (∼80%). A decrease in J c in applied magnetic field, parallel or perpendicular to the sample wide surface was observed for all tapes. Intermediate rolling improved the self-field Jc (T=77 K) of the tapes by 25%. Both Jc versus applied field curves and normalized pinning force density Fp/F pmax versus applied field curves showed that the pinning strength was significantly enhanced with thermo-mechanical treatments. SEM micrographs showed improvements in the grain alignment of tapes with intermediate rolling. Enhancement in Jc was observed in the nano Cr2O 3 added tapes.

AB - Ag-sheathed (Bi1.6Pb0.4)Sr2Ca 2Cu3O10 (Bi-2223) high temperature superconductor tapes with 0.1 wt% nano Cr2O3 were fabricated using the powder-in-tube method. The effects of intermediate rolling and sintering temperature on the transport critical current density (J c) under self-field and applied magnetic field were studied. The X-ray patterns showed a dominant Bi-2223 phase (∼80%). A decrease in J c in applied magnetic field, parallel or perpendicular to the sample wide surface was observed for all tapes. Intermediate rolling improved the self-field Jc (T=77 K) of the tapes by 25%. Both Jc versus applied field curves and normalized pinning force density Fp/F pmax versus applied field curves showed that the pinning strength was significantly enhanced with thermo-mechanical treatments. SEM micrographs showed improvements in the grain alignment of tapes with intermediate rolling. Enhancement in Jc was observed in the nano Cr2O 3 added tapes.

KW - Current density

KW - flux pinning

KW - nanometric CrO

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