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Synthesis and Processing of Doped Hg1Ba2Ca2Cu3Oy Superconductors

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Book cover Advances in Cryogenic Engineering Materials

Part of the book series: Advances in Cryogenic Engineering ((ACRE,volume 44))

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Abstract

Detailed studies on the synthesis and processing of bulk (Hg,A)Ba2Ca2Cu3Oy (A=Bi, Pb) were conducted to understand the role of heat treatment, precursor phase assembly, and Hg-pressure during synthesis. An additional lower temperature annealing stage after high temperature reaction is shown to improve the microstructural characteristics of Hg1223 samples. BaCaCuO precursor powders containing free CaO allows formation of liquid phase and assists in grain growth and texture development. Control of Hg-pressure during the reaction by using an external Hg-source, in sealed tubes, improves the density of Hg1223 products. Chemical nature of external Hg-source changes Hg-pressure and influences melting characteristics and grain growth. CaHgO2 is shown to be a very effective external Hg-source for producing dense Hg1223 materials with improved grain growth and texture. Phase purity and microstructural characteristics are correlated with high field magnetization measurements.

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Author information

Authors and Affiliations

  1. National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, 32310, USA

    P. V. P. S. S. Sastry, K. M. Amm, D. C. Knoll, S. C. Peterson & J. Schwartz

  2. Department of Physics, Florida State University, Tallahassee, FL, 32306, USA

    K. M. Amm & J. Schwartz

  3. Department of Mechanical Engineering, FAMU-FSU College of Engineering, Tallahassee, FL, 32306, USA

    D. C. Knoll, S. C. Peterson & J. Schwartz

Authors
  1. P. V. P. S. S. Sastry
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  2. K. M. Amm
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  3. D. C. Knoll
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  4. S. C. Peterson
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  5. J. Schwartz
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Editor information

Editors and Affiliations

  1. Argonne National Laboratory, Argonne, Illinois, USA

    U. Balu Balachandran

  2. Naval Research Laboratory, Washington, D.C., USA

    Donald G. Gubser

  3. Texas A&M University, College Station, Texas, USA

    K. Ted Hartwig

  4. Cryogenic Materials, Inc., Boulder, Colorado, USA

    Richard P. Reed

  5. Oregon State University, Corvallis, Oregon, USA

    William H. Warnes

  6. Synchrony, Bordentown, New Jersey, USA

    Victoria A. Bardos

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© 1998 Springer Science+Business Media New York

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Sastry, P.V.P.S.S., Amm, K.M., Knoll, D.C., Peterson, S.C., Schwartz, J. (1998). Synthesis and Processing of Doped Hg1Ba2Ca2Cu3Oy Superconductors. In: Balachandran, U.B., Gubser, D.G., Hartwig, K.T., Reed, R.P., Warnes, W.H., Bardos, V.A. (eds) Advances in Cryogenic Engineering Materials . Advances in Cryogenic Engineering, vol 44. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9056-6_63

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  • DOI: https://doi.org/10.1007/978-1-4757-9056-6_63

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4757-9058-0

  • Online ISBN: 978-1-4757-9056-6

  • eBook Packages: Springer Book Archive

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