Microstructure and properties of Tl0.75Bi0.25Sr1.6Ba0.4Ca 2Cu3Ox tapes

M. Jiang, Michael T. Lanagan, K. C. Goretta

Research output: Contribution to journalArticle

Abstract

Ag-clad Tl0.75Bi0.25Sr1.6Ba0.4Ca 2Cu3Ox tapes were fabricated by a powder-in-tube technique. The starting powders consisted of Bi2Sr2CaCu2Ox plus simple oxides. The tapes were heated in flowing O2 at 835-865°C for 7.5-10 h. Room-temperature pressing at 1.0-1.5 GPa produced tapes with denser, more phase-pure cores, and transport critical current density Jc at 77 K in self-field that was increased by a factor of ≈2. The maximum Jc value of 6 × 103 A/cm2 was obtained with heating at 840-850°C for ≈ 10 h, with three intermediate pressing steps. The cores of the best tapes were still rather porous and contained significant concentrations of nonsuperconducting phases. Published by Elsevier Science Ltd.

Original languageEnglish (US)
Pages (from-to)291-297
Number of pages7
JournalApplied Superconductivity
Volume4
Issue number7-8
DOIs
StatePublished - Jan 1 1996

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Tapes
tapes
microstructure
Microstructure
pressing
Powders
critical current
current density
tubes
Heating
heating
Oxides
oxides
room temperature
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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title = "Microstructure and properties of Tl0.75Bi0.25Sr1.6Ba0.4Ca 2Cu3Ox tapes",
abstract = "Ag-clad Tl0.75Bi0.25Sr1.6Ba0.4Ca 2Cu3Ox tapes were fabricated by a powder-in-tube technique. The starting powders consisted of Bi2Sr2CaCu2Ox plus simple oxides. The tapes were heated in flowing O2 at 835-865°C for 7.5-10 h. Room-temperature pressing at 1.0-1.5 GPa produced tapes with denser, more phase-pure cores, and transport critical current density Jc at 77 K in self-field that was increased by a factor of ≈2. The maximum Jc value of 6 × 103 A/cm2 was obtained with heating at 840-850°C for ≈ 10 h, with three intermediate pressing steps. The cores of the best tapes were still rather porous and contained significant concentrations of nonsuperconducting phases. Published by Elsevier Science Ltd.",
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Microstructure and properties of Tl0.75Bi0.25Sr1.6Ba0.4Ca 2Cu3Ox tapes. / Jiang, M.; Lanagan, Michael T.; Goretta, K. C.

In: Applied Superconductivity, Vol. 4, No. 7-8, 01.01.1996, p. 291-297.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Microstructure and properties of Tl0.75Bi0.25Sr1.6Ba0.4Ca 2Cu3Ox tapes

AU - Jiang, M.

AU - Lanagan, Michael T.

AU - Goretta, K. C.

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AB - Ag-clad Tl0.75Bi0.25Sr1.6Ba0.4Ca 2Cu3Ox tapes were fabricated by a powder-in-tube technique. The starting powders consisted of Bi2Sr2CaCu2Ox plus simple oxides. The tapes were heated in flowing O2 at 835-865°C for 7.5-10 h. Room-temperature pressing at 1.0-1.5 GPa produced tapes with denser, more phase-pure cores, and transport critical current density Jc at 77 K in self-field that was increased by a factor of ≈2. The maximum Jc value of 6 × 103 A/cm2 was obtained with heating at 840-850°C for ≈ 10 h, with three intermediate pressing steps. The cores of the best tapes were still rather porous and contained significant concentrations of nonsuperconducting phases. Published by Elsevier Science Ltd.

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