Preparation, structure and properties of the high Tc Bi-based and Y-based cuprates

J. M. Tarascon, P. Barboux, Laura Greene, B. G. Bagley, G. W. Hull, Y. LePage, W. R. McKinnon

Research output: Contribution to journalArticle

Abstract

The structure and some properties of the new bismuth-based high Tc superconductor are discussed and compared to those of the 40K and 90K materials. While the superconducting behavior of the 90K is very sensitive to the oxygen composition and therefore to the annealing procedure, the Bi-based phase is dramatically less affected. But it is more sensitive to the solid state reaction temperature and starting composition. Thus a better control of the chemistry using a solution technique should enhance the performances of this material. The Y-based 90K superconducting oxide has been synthesized using a novel solution technique (Sol-Gel process). Physical properties, including resistivity and critical current, are compared to those obtained by solid state reaction in which the starting materials include carbonates, acetates and nitrates. The solution technique produces YBa2Cu3O7-y powders at lower reaction temperatures and shorter times. The smaller particle size obtained by this method (1μm) yields denser compacts upon sintering. The solution derived materials are made from inexpensive reagent-grade (98% pure) starting materials and they superconduct at 91K with narrow transition widths (0.6K). Although the material is homogeneous, the critical currents do not significantly exceed those reported for solid-state reacted materials and we attribute this to the presence of carbon at the grain boundaries. Finally, the ability to produce stable viscous gels allows us to prepare large-area thick films on various substrates. Best results are obtained on SrTiO3 or MgO substrates, and problems encountered in making thick films on substrates of technological interest are discussed.

Original languageEnglish (US)
Pages (from-to)566-571
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume153-155
Issue numberPART 1
DOIs
StatePublished - Jun 1988

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cuprates
solid state
preparation
thick films
critical current
sol-gel processes
Critical currents
bismuth
reagents
nitrates
Solid state reactions
acetates
grade
carbonates
Thick films
sintering
grain boundaries
physical properties
gels
chemistry

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Tarascon, J. M., Barboux, P., Greene, L., Bagley, B. G., Hull, G. W., LePage, Y., & McKinnon, W. R. (1988). Preparation, structure and properties of the high Tc Bi-based and Y-based cuprates. Physica C: Superconductivity and its applications, 153-155(PART 1), 566-571. https://doi.org/10.1016/0921-4534(88)90719-8

Preparation, structure and properties of the high Tc Bi-based and Y-based cuprates. / Tarascon, J. M.; Barboux, P.; Greene, Laura; Bagley, B. G.; Hull, G. W.; LePage, Y.; McKinnon, W. R.

In: Physica C: Superconductivity and its applications, Vol. 153-155, No. PART 1, 06.1988, p. 566-571.

Research output: Contribution to journalArticle

Tarascon, JM, Barboux, P, Greene, L, Bagley, BG, Hull, GW, LePage, Y & McKinnon, WR 1988, 'Preparation, structure and properties of the high Tc Bi-based and Y-based cuprates', Physica C: Superconductivity and its applications, vol. 153-155, no. PART 1, pp. 566-571. https://doi.org/10.1016/0921-4534(88)90719-8
Tarascon, J. M. ; Barboux, P. ; Greene, Laura ; Bagley, B. G. ; Hull, G. W. ; LePage, Y. ; McKinnon, W. R. / Preparation, structure and properties of the high Tc Bi-based and Y-based cuprates. In: Physica C: Superconductivity and its applications. 1988 ; Vol. 153-155, No. PART 1. pp. 566-571.
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