Fabrication of YBCO coated conductors using advanced TFA-MOD process

K. Nakaoka, Y. Tokunaga, J. S. Matsuda, H. Fuji, S. Koyama, R. Teranishi, T. Izumi, Y. Shiohara, T. Watanabe, Y. Yamada, T. Goto, A. Yoshinaka, A. Yajima

Research output: Contribution to journalConference article

22 Citations (Scopus)

Abstract

We have investigated the influence of the heating rate in the calcination process on the superconducting properties in order to optimize an advanced TFA-MOD process. The increase of the heating rate makes Jc values lower, and the maximum values of HF gas generation rate higher. From TEM observation of the precursor film, the large pores and segregation of Cu elements were observed in the films at high heating rates. Consequently, it is clear that the increase of the heating rate during calcination process caused abrupt HF gas generation leading to degradation of the surface morphologies, formation of large pores and segregation of Cu elements. These morphological and microstructual differences could be one of the reasons for a reduction in Jc values of the YBCO films.

Original languageEnglish
Pages (from-to)954-958
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume426-431
Issue numberII
DOIs
Publication statusPublished - Oct 7 2005
Externally publishedYes
EventProceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity -
Duration: Nov 23 2004Nov 25 2004

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this