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Densification and Critical Current Density of YBa2Cu3Ox Ceramics

  • Shigeki Kobayashi
  • Toshio Kandori
  • Yasuyoshi Saito
  • Shigetaka Wada
Conference paper

Abstract

The improvement of Jc was explored from the aspect of densification of sintered bodies in YBa2 Cu3 Ox. Two methods were employed to increase the bulk density of sintered bodies; (a) Calcined powder was ball-milled to obtain fine particles and increase the sinterabi1ity. (b) Specimens were formed by swaging to get powder compacts of high density.

Sintered bodies of over 6.0 g/cm3 were easily obtained but they did not necessarily show a high Jc value. Several problems such as the reaction of powder with water during ball milling, the formation of microcracks on sintering and low oxygen contents of specimens were identified. Reducing these problems improved the Jc value up to 600 – 800 A/cm2.

Keywords

Bulk Density Sinter Temperature Critical Current Density Current Path Sintered Body 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    M. K. Wu, J. R. Ashburn, C. T. Torng, P. H. Hor, R. L. Meng, L. Gao, Z. J. Huang, Y. Q. Wang and C. W. Chu, Phys. Rev. Lett. 58 (1987), 908.ADSCrossRefGoogle Scholar
  2. 2.
    S. Hikami, T. Hirai and S. Kagoshima, Jpn. J. Appl. Phys. 26 (1987), L314.ADSCrossRefGoogle Scholar
  3. 3.
    R. J. Cava, B. Batlogg, C. H. Chen, E. A. Rietman, S. M. Zahyrak, D. Werder, Nature 129 (1987),423.ADSCrossRefGoogle Scholar
  4. 4.
    M. Tokumoto, H. Ihara, T. Matsubara, M. Hirabayashi, N. Terada, H. Oyanagi, K. Murata and Y. Kimura, Jpn. J. Appl. Phys. 26 (1987), L1565.ADSCrossRefGoogle Scholar
  5. 5.
    Y. Yamada, N. Fukushima, S. Nakayama, H. Yoshino and S. Murase, Jpn. J. Appl. Phys. 26 (1987), L865.ADSCrossRefGoogle Scholar
  6. 6.
    T. Hioki, A. Oota, M. Ohkubo, T. Noritake, J. Kawamoto and O. Kamigaito, Jpn. J. Appl. Phys. 26 (1987), L873.ADSCrossRefGoogle Scholar
  7. 7.
    J. W. Ekin, Adv. Ceram. Mater. 2 [3B] (1987), 586.Google Scholar
  8. 8.
    D. W. Johnson, Jr., E. M. Gyorgy, W. W. Rhodes, R. J. Cava, L. C. Feldman and R. B. van Dover, Adv. Ceram. Mater. 2 [3B] (1987), 364.Google Scholar
  9. 9.
    T. Motai and N. Ichinose, J. Ceram. Soc. Jpn. 96 (1988), 373.CrossRefGoogle Scholar
  10. 10.
    R. S. Roth, K. L. Davis and J. R. Dennis, Adv. Ceram. Mater. 2 [3B] (1987), 303.ADSGoogle Scholar
  11. 11.
    M. F. Yan, R. L. Barns, H. M. O’Bryan,Jr., P. K. Gallagher, R. C. Sherwood and S. Jin, Appl. Phys. Lett. 51 (1987), 532.ADSCrossRefGoogle Scholar
  12. 12.
    M. Yoshimura, S. Inoue, N. Ogasawara, Y. Ishikawa, T. Nakamura, Y. Takagi, R. Liang and S. Somiya, J. Jpn. Soc. Powder 8 Powder Met. 34 (1987), 659.CrossRefGoogle Scholar
  13. 13.
    T. Yamamoto, T. Furusawa, H. Seto, K. Park, K. Kuwabara, T. Hasegawa, K. Kishio, K. Kitazawa and K. Fueki, J. Jpn. Soc. Powder & Powder Met. 35 (1988), 333.CrossRefGoogle Scholar
  14. 14.
    Y. Saito, unpublished data.Google Scholar
  15. 15.
    T. Kandori, unpublished data.Google Scholar

Copyright information

© Springer Japan 1989

Authors and Affiliations

  • Shigeki Kobayashi
    • 1
  • Toshio Kandori
    • 1
  • Yasuyoshi Saito
    • 1
  • Shigetaka Wada
    • 1
  1. 1.Toyota Cental Research and Development Laboratories, Inc.Aichi, 480-11Japan

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