Influence of T1-containing coprecipitation derived precursor powder on microstructure and transport properties of T10.8Bi0.2Sr2Ca0.8 Y0.2Cu2O7 superconducting dip-coated tapes

Faizah Md Salleh, Ahmad K. Yahya, Zaiki Awang, Mohammad Hafizuddin Jumali

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Abstract

Ag clad dip-coated superconductor tapes were fabricated from Tl-1212 superconducting powders of Tl0.8Bi0.2 Sr2Ca08Y02Cu2O7 starting composition derived via two different methods; the conventional Solid-State (SS) and coprecipitation (CP) methods. The effects of using superconducting powders derived from SS and CP methods on phase formation, microstructure and critical current density were investigated for tapes annealed at 850°C for 60 min in flowing O2. XRD analysis of the tapes oxide cores indicated a lower volume percentage of 1212 phase for the CP tape (84%) compared to the SS tape (97%). However, the transport Jc of the CP tape (4670 A cm-2) was significantly higher than the SS tape (560 A cm-2). The SEM micrograph of the CP tape's oxide core revealed partially melted microstructure with fused grains in contrast to the microstructure of the SS tape's core which shows porous microstructure with irregularly shaped grains. The higher Jc for the CP tape is suggested to be due to improved inter-grain connectivity as a result of the partial melting.

Original languageEnglish
Pages (from-to)185-188
Number of pages4
JournalJournal of Applied Sciences
Volume8
Issue number1
Publication statusPublished - 2008

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dip
microstructure
oxide
density current
partial melting
connectivity
scanning electron microscopy
X-ray diffraction
solid state
method

Keywords

  • Coprecipitation
  • Dip-coated tapes
  • Tl1212 superconductor

ASJC Scopus subject areas

  • General

Cite this

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title = "Influence of T1-containing coprecipitation derived precursor powder on microstructure and transport properties of T10.8Bi0.2Sr2Ca0.8 Y0.2Cu2O7 superconducting dip-coated tapes",
abstract = "Ag clad dip-coated superconductor tapes were fabricated from Tl-1212 superconducting powders of Tl0.8Bi0.2 Sr2Ca08Y02Cu2O7 starting composition derived via two different methods; the conventional Solid-State (SS) and coprecipitation (CP) methods. The effects of using superconducting powders derived from SS and CP methods on phase formation, microstructure and critical current density were investigated for tapes annealed at 850°C for 60 min in flowing O2. XRD analysis of the tapes oxide cores indicated a lower volume percentage of 1212 phase for the CP tape (84{\%}) compared to the SS tape (97{\%}). However, the transport Jc of the CP tape (4670 A cm-2) was significantly higher than the SS tape (560 A cm-2). The SEM micrograph of the CP tape's oxide core revealed partially melted microstructure with fused grains in contrast to the microstructure of the SS tape's core which shows porous microstructure with irregularly shaped grains. The higher Jc for the CP tape is suggested to be due to improved inter-grain connectivity as a result of the partial melting.",
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author = "Salleh, {Faizah Md} and Yahya, {Ahmad K.} and Zaiki Awang and Jumali, {Mohammad Hafizuddin}",
year = "2008",
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TY - JOUR

T1 - Influence of T1-containing coprecipitation derived precursor powder on microstructure and transport properties of T10.8Bi0.2Sr2Ca0.8 Y0.2Cu2O7 superconducting dip-coated tapes

AU - Salleh, Faizah Md

AU - Yahya, Ahmad K.

AU - Awang, Zaiki

AU - Jumali, Mohammad Hafizuddin

PY - 2008

Y1 - 2008

N2 - Ag clad dip-coated superconductor tapes were fabricated from Tl-1212 superconducting powders of Tl0.8Bi0.2 Sr2Ca08Y02Cu2O7 starting composition derived via two different methods; the conventional Solid-State (SS) and coprecipitation (CP) methods. The effects of using superconducting powders derived from SS and CP methods on phase formation, microstructure and critical current density were investigated for tapes annealed at 850°C for 60 min in flowing O2. XRD analysis of the tapes oxide cores indicated a lower volume percentage of 1212 phase for the CP tape (84%) compared to the SS tape (97%). However, the transport Jc of the CP tape (4670 A cm-2) was significantly higher than the SS tape (560 A cm-2). The SEM micrograph of the CP tape's oxide core revealed partially melted microstructure with fused grains in contrast to the microstructure of the SS tape's core which shows porous microstructure with irregularly shaped grains. The higher Jc for the CP tape is suggested to be due to improved inter-grain connectivity as a result of the partial melting.

AB - Ag clad dip-coated superconductor tapes were fabricated from Tl-1212 superconducting powders of Tl0.8Bi0.2 Sr2Ca08Y02Cu2O7 starting composition derived via two different methods; the conventional Solid-State (SS) and coprecipitation (CP) methods. The effects of using superconducting powders derived from SS and CP methods on phase formation, microstructure and critical current density were investigated for tapes annealed at 850°C for 60 min in flowing O2. XRD analysis of the tapes oxide cores indicated a lower volume percentage of 1212 phase for the CP tape (84%) compared to the SS tape (97%). However, the transport Jc of the CP tape (4670 A cm-2) was significantly higher than the SS tape (560 A cm-2). The SEM micrograph of the CP tape's oxide core revealed partially melted microstructure with fused grains in contrast to the microstructure of the SS tape's core which shows porous microstructure with irregularly shaped grains. The higher Jc for the CP tape is suggested to be due to improved inter-grain connectivity as a result of the partial melting.

KW - Coprecipitation

KW - Dip-coated tapes

KW - Tl1212 superconductor

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