Enlargement of YBCO Single Crystals by Crystal Pulling

  • Yasuo Namikawa
  • Masahiro Egami
  • Yuh Shiohara
Conference paper

Abstract

The melt convection phenomena in YBa2Cu3O7-x(Y123) single crystal growth by the modified pulling method (Solute Rich Liquid Crystal Pulling method; SRL-CP method)[1] was investigated by the experiments and the numerical calculations. Increase of the crystal diameter and the crystal rotation rate increased the strength of the forced convection in the melt, and as a result, the temperature at the crystal growth interface increased. This led to reduction of the crystal growth rate. Using a larger crucible could stabilize the melt flow pattern with the change of the crystal diameter and reduce the generation rate of the floating particles on the melt surface, and as a consequence the period of the single crystal growth could be extended. A Y123 single crystal which was 14.5mm*14.5mm and 13mm in length could be pulled along the c-axis with 100mm inner diameter crucible and a newly developed large furnace.

Key Words

YBa2Cu3O7-x single crystal growth SRL-CP method melt convection numerical simulation 
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Copyright information

© Springer-Verlag Tokyo 1995

Authors and Affiliations

  • Yasuo Namikawa
    • 1
  • Masahiro Egami
    • 1
  • Yuh Shiohara
    • 1
  1. 1.Superconductivity Research LaboratoryISTECKoto-Ku, Tokyo 135Japan

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