Advertisement

Superconducting Properties of Sintered Pb-Doped Bi Oxide Superconductor Prepared by an Intermediate Repressing Process

  • Toshihisa Asano
  • Yoshiaki Tanaka
  • Masao Fukutomi
  • Kazunori Jikihara
  • Hiroshi Maeda
Part of the An International Cryogenic Materials Conference Publication book series (ACRE, volume 36)

Abstract

Recently, we have shown that highly oriented microstructure was achieved by introducing intermediate repressing on bulk sample by powder method. The sintering has been done with the procedure of sintering of the pellet, re-cold-pressing(i.e. uniaxial compaction at room temperature) during the interrupted sintering and then resintering. We have also shown that the intermediate repressing accelerate the atomic diffusion rate, consequently, the growth rate of the high-Tc phase. By this method it becomes very easy to get almost single high-Tc phase by short sintering duration. However, in the higher fields above 0.1 T Jc decreases rapidly though those in the lower field were much improved by introducing this method. We studied the effects of Ag addition to the Bi system for the high Tc phase growth rate and superconducting characteristics on the bulk samples prepared by the powder method combined with the intermediate pressing process. It was found that the Jc decreases with the appearance of Ag rich phase, in particular, excess amount of Ag degrades the layer continuity of the high Tc phase though slight improvement in the growth rate of high Tc phase was observed.

Keywords

Critical Current Density Alternative Magnetic Field Oxide Superconductor Powder Method Fracture Cross Section 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    H. Maeda, Y. Tanaka, M. Fukutomi and T. Asano, A new High-Tc Oxide Superconductor without Rear Earth Element, Jpn. J. Appl. Phys. 27:L209(1988).CrossRefGoogle Scholar
  2. 2.
    R. J. Cava, B. Batlogg, S. A. Sunshine, T. Siegrist, R. M. Fleming, K. Rabe, L. F. Schneemeyer, D. W. Murphy, R. B. van Dover, P. K. Gallaghers, S. H. Glarum, S. Nakahara, R. C. Farrow, J. J. Krajewski, S. M. Zahurak, J. V. Waszczak, J. H. Marshall, P. Marsh, L. W. Rupp Jr., W. F. Peck and E. A. Rietman, Studies of Oxygen-Deficient Ba2YCu3O7- and Superconductivity Bi(Pb)-Sr-Ca-Cu-O, Physica C 153–155:560(1988)CrossRefGoogle Scholar
  3. 3.
    S. Green, C. Jiang, Yu Mei, H. L. Luo and C. Politis, Zero resistance at 107 K in the (Bi,Pb)-Ca-Sr-Cu oxide system, Phys. Rev. B 38:5016(1988)CrossRefGoogle Scholar
  4. 4.
    M. Takano, J. Takada, K. Oda, H. Kitaguchi, Y. Miura, Y. Ikeda, Y. Tornii and H. Mazaki, High-Tc phase Promoted and Stabilized in the Bi,Pb-Sr-Ca-Cu-O System, Jpn.J.Appl. Phys. 27:L1041(1988)CrossRefGoogle Scholar
  5. 5.
    U. Endo, S. Koyama and T. Kawai, Preparation of the High-T phase of Bi-Sr-Ca-Cu-O Superconductor, Jpn. J. Appl. Phys. 27:L1476(1988)CrossRefGoogle Scholar
  6. 6.
    S. Koyama, U. Endo and T. Kawai, Preparation of single 110 K phase of Bi-Sr-Ca-Cu-0 Superconductor, Jpn. J. Appl. Phys. 27: L186(1988)CrossRefGoogle Scholar
  7. 7.
    T. Asano, Y. Tanaka, M. Fukutomi, K. Jikihara, J. Machida and H. Maeda, Preparation of Highly Oriented Microstructure in the (Bi,Pb)-Sr-Ca-Cu-O sintered Oxide Superconductor, Jpn. J. Appl. Phys. 27:L1652(1988)CrossRefGoogle Scholar
  8. 8.
    Y. Tanaka, T. Asano, K. Jikihara, M. Fukutomi, J. Machida and H. Maeda, Improvement in the Current Carrying Capacity in High-Tc BiSrCaCuO Superconductors, Jpn. J. Appl. Phys. 27:L1655 (1988)CrossRefGoogle Scholar
  9. 9.
    T. Asano, Y. Tanaka, M. Fukutomi, K. Jikihara and H. Maeda, Properties of Pb-Doped Bi-Sr-Ca-Cu-O Superconductors prepared by the Intermediate Pressing Process, Jpn. J. Appl.Phys.28:L595 (1988)CrossRefGoogle Scholar
  10. 10.
    T. Hatano, K. Aota, S. Ikeda, K. Nakamura and K. Ogawa, Growth of the 2223 Phase in Leaded Bi-Sr-Ca-Cu-O System, Jpn. J. Appl. Phys. 27:L2055(1988)CrossRefGoogle Scholar
  11. 11.
    M. Mimura, H. Kumakura, K. Togano and H. Maeda, Improvement of the critical current density in the silver sheathed Bi-Sr-Ca-Cu-O Superconducting Tape, Appl. Phys. Lett. 54:1582(1988)CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1990

Authors and Affiliations

  • Toshihisa Asano
    • 1
  • Yoshiaki Tanaka
    • 1
  • Masao Fukutomi
    • 1
  • Kazunori Jikihara
    • 1
    • 2
  • Hiroshi Maeda
    • 1
  1. 1.Tsukuba LaboratoriesNational Research Institute for MetalsTsukuba-City, IbarakiJapan
  2. 2.Sumitomo Heavy Industries, Ltd. Hiratsuka Research LaboratoryHiratsuka, KanagawaJapan

Personalised recommendations