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The Tl-Ba-Ca-Cu-O superconducting ceramics containing Al2O3

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Abstract

The Tl-Ba-Ca-Cu-O superconducting ceramics containing Al2O3 have been prepared utilizing the reaction, Tl2O2+BaCuO2+Ca2CuO3+A12O3 or Tl2O3+BaCuO2 +Ca2CuO3+AlCuO2.5. It is shown that the resulting ceramics show the superconductivity at temperatures over 100 K when the Al/Cu molar ratio is kept below 0.5. EPMA analyses revealed that there is always an Al2BaO4 layer between the superconducting Tl-Ba-Ca-Cu-O and Al2O3 phases, leading to the separation between the superconducting and A12O3 phases.

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Authors and Affiliations

  1. Ceramics Research Laboratory, Onoda Cement Co., Ltd., 135, Tokyo, Japan

    T. Itoh & H. Uchikawa

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  1. T. Itoh
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  2. H. Uchikawa
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Itoh, T., Uchikawa, H. The Tl-Ba-Ca-Cu-O superconducting ceramics containing Al2O3 . Appl. Phys. A 48, 321–323 (1989). https://doi.org/10.1007/BF00618892

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  • DOI: https://doi.org/10.1007/BF00618892

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