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Preparation of Superconducting YBa2Cu3O7−x Compounds By Water Extraction Variant Of Sol-Gel Process

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Abstract

The starting sols were prepared by addition of ammonium hydroxide to acidic solutions of Y-Ba-Cu acetates or by dissolving solid Ba9CO9 or CuCO9.CuCOH)2H2O in acetates of the remaining components. The sols were then gelled to spherical particles with diameter below 50μm by extracting water with 2-ethyl-l-hexanol or to shard by evaporation of water. After thermal treatment of both powders amorphous and then crystalline YBa2Cu,9O7−x were obtained. Formation of these compounds is strongly improved by aging the gel at 200°C. Green and sintered pellets exhibit excellent superconductivity properties.

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Authors and Affiliations

  1. Dept. of Structural Research, Institute of Nuclear Chemistry and Technology, Warsaw, Poland

    A. Deptula, W. Lada, T. Olczak & T. zoltowski

  2. ENEA C.R.E, Casaccia, Italy

    A. Di Bartolomeo

Authors
  1. A. Deptula
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  2. W. Lada
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  3. T. Olczak
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  4. T. zoltowski
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  5. A. Di Bartolomeo
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Deptula, A., Lada, W., Olczak, T. et al. Preparation of Superconducting YBa2Cu3O7−x Compounds By Water Extraction Variant Of Sol-Gel Process. MRS Online Proceedings Library 180, 907 (1990). https://doi.org/10.1557/PROC-180-907

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