Fabrication of heavily Pb-doped Bi2212 tapes

Author

Murakami, K. ; Sugita, K. ; Shimoyama, J. ; Horii, S. ; Otzschi, K. ; Kishio, K.

Author_Institution

Dept. of Supercond., Tokyo Univ., Japan

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

3042

Lastpage

3045

Abstract

Heavily Pb-doped Bi2212 tapes were fabricated on silver and nickel substrates. On the Ag substrate, addition of fine MgO particles resulted in the increase of viscosity of the melt, and the quality of the tapes was remarkably improved due to suppression of outflow of the melt. On the Ni substrates, Bi(Pb)2212 phases were rarely formed by the conventional melt-solidification method, however, the amorphous-to-crystallization method gave a highly textured Bi(Pb)2212/NiO/Ni tape. Microstructures and superconducting properties of these tapes were investigated, The highest J_c achieved in this study was 13000A/cm² (30 K, OT). This J_c value, however, was still lower than that of the Pb-free tape

Keywords

bismuth compounds; calcium compounds; critical current density (superconductivity); crystal microstructure; crystallisation; high-temperature superconductors; lead; nickel; silver; solidification; strontium compounds; superconducting tapes; viscosity; 30 K; Ag; Ag substrate; Bi(Pb)2212 phases; Bi₂Sr₂CaCu₂O₈; J_c; MgO; Ni; Ni substrate; NiO; amorphous-crystallization method; fabrication; fine MgO particles; heavily Pb-doped Bi2212 tapes; highly textured Bi(Pb)2212/NiO/Ni tape; melt; melt-solidification; nickel; outflow; silver; superconducting properties; viscosity; Fabrication; High temperature superconductors; Magnetic fields; Nickel; Powders; Silver; Superconducting films; Superconductivity; Viscosity; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919704

Filename

919704