Transport critical current density of Bi-Sr-Ca-Cu-O/Ag superconductor tapes with addition of magnetic nanopowder γ-Fe2O3

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Abstract

The effect of sintering temperature on the transport properties of Ag-sheathed-(Bi1.6Pb0.4)Sr2Ca 2Cu3O10-(γ-Fe2O 3)0.01 superconductor tapes prepared by the powder-in-tube technique with sintering time fixed at 50 h has been investigated. The maximum transport critical current density, Jc of 6490 A/cm2 at 77 K, was observed at sintering temperature of 845 °C. A further single intermediate rolling step increases Jc to 9560 A/cm2. Sintering temperature from 830 to 845 °C increases the 2223 phase content and resulted in improved Jc. At 850 °C, the content of 2223 phase decreased resulting in a corresponding decrease in Jc. X-ray diffraction patterns suggest that the 2212 phase reacts with non-superconducting phase such as CaCuO2, (SrCa) 2CuO3, CaO, and CuO to form the 2223 phase. Samples without γ-Fe2O3 prepared under the same condition showed a lower Jc with maximum at 1560 A/cm2. Our results show that nanomagnetic γ-Fe2O3 addition improved Jc which supports previous calculations on the possibility of frozen flux superconductor with nanomagnetic addition in this class of materials.

Original languageEnglish
Pages (from-to)525-528
Number of pages4
JournalScience and Technology of Advanced Materials
Volume6
Issue number5
DOIs
Publication statusPublished - Jul 2005

Fingerprint

Tapes
Superconducting materials
Sintering
Nanomagnetics
Powders
Transport properties
Temperature
Diffraction patterns
Fluxes
X ray diffraction

Keywords

  • Flux pinning
  • Magnetic nanopowder
  • Superconductor tapes
  • Transport critical current density

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

@article{169b484b28fa4a2aa1486463b6db3842,
title = "Transport critical current density of Bi-Sr-Ca-Cu-O/Ag superconductor tapes with addition of magnetic nanopowder γ-Fe2O3",
abstract = "The effect of sintering temperature on the transport properties of Ag-sheathed-(Bi1.6Pb0.4)Sr2Ca 2Cu3O10-(γ-Fe2O 3)0.01 superconductor tapes prepared by the powder-in-tube technique with sintering time fixed at 50 h has been investigated. The maximum transport critical current density, Jc of 6490 A/cm2 at 77 K, was observed at sintering temperature of 845 °C. A further single intermediate rolling step increases Jc to 9560 A/cm2. Sintering temperature from 830 to 845 °C increases the 2223 phase content and resulted in improved Jc. At 850 °C, the content of 2223 phase decreased resulting in a corresponding decrease in Jc. X-ray diffraction patterns suggest that the 2212 phase reacts with non-superconducting phase such as CaCuO2, (SrCa) 2CuO3, CaO, and CuO to form the 2223 phase. Samples without γ-Fe2O3 prepared under the same condition showed a lower Jc with maximum at 1560 A/cm2. Our results show that nanomagnetic γ-Fe2O3 addition improved Jc which supports previous calculations on the possibility of frozen flux superconductor with nanomagnetic addition in this class of materials.",
keywords = "Flux pinning, Magnetic nanopowder, Superconductor tapes, Transport critical current density",
author = "Yahya, {S. Y.} and Jumali, {Mohammad Hafizuddin} and Lau, {K. T.} and {Abd. Shukor}, Roslan",
year = "2005",
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T1 - Transport critical current density of Bi-Sr-Ca-Cu-O/Ag superconductor tapes with addition of magnetic nanopowder γ-Fe2O3

AU - Yahya, S. Y.

AU - Jumali, Mohammad Hafizuddin

AU - Lau, K. T.

AU - Abd. Shukor, Roslan

PY - 2005/7

Y1 - 2005/7

N2 - The effect of sintering temperature on the transport properties of Ag-sheathed-(Bi1.6Pb0.4)Sr2Ca 2Cu3O10-(γ-Fe2O 3)0.01 superconductor tapes prepared by the powder-in-tube technique with sintering time fixed at 50 h has been investigated. The maximum transport critical current density, Jc of 6490 A/cm2 at 77 K, was observed at sintering temperature of 845 °C. A further single intermediate rolling step increases Jc to 9560 A/cm2. Sintering temperature from 830 to 845 °C increases the 2223 phase content and resulted in improved Jc. At 850 °C, the content of 2223 phase decreased resulting in a corresponding decrease in Jc. X-ray diffraction patterns suggest that the 2212 phase reacts with non-superconducting phase such as CaCuO2, (SrCa) 2CuO3, CaO, and CuO to form the 2223 phase. Samples without γ-Fe2O3 prepared under the same condition showed a lower Jc with maximum at 1560 A/cm2. Our results show that nanomagnetic γ-Fe2O3 addition improved Jc which supports previous calculations on the possibility of frozen flux superconductor with nanomagnetic addition in this class of materials.

AB - The effect of sintering temperature on the transport properties of Ag-sheathed-(Bi1.6Pb0.4)Sr2Ca 2Cu3O10-(γ-Fe2O 3)0.01 superconductor tapes prepared by the powder-in-tube technique with sintering time fixed at 50 h has been investigated. The maximum transport critical current density, Jc of 6490 A/cm2 at 77 K, was observed at sintering temperature of 845 °C. A further single intermediate rolling step increases Jc to 9560 A/cm2. Sintering temperature from 830 to 845 °C increases the 2223 phase content and resulted in improved Jc. At 850 °C, the content of 2223 phase decreased resulting in a corresponding decrease in Jc. X-ray diffraction patterns suggest that the 2212 phase reacts with non-superconducting phase such as CaCuO2, (SrCa) 2CuO3, CaO, and CuO to form the 2223 phase. Samples without γ-Fe2O3 prepared under the same condition showed a lower Jc with maximum at 1560 A/cm2. Our results show that nanomagnetic γ-Fe2O3 addition improved Jc which supports previous calculations on the possibility of frozen flux superconductor with nanomagnetic addition in this class of materials.

KW - Flux pinning

KW - Magnetic nanopowder

KW - Superconductor tapes

KW - Transport critical current density

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