Title :
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
fDate :
3/1/2001 12:00:00 AM
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 Jc achieved in this study was 13000A/cm2 (30 K, OT). This Jc 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; Jc; 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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
