TY - GEN
T1 - Influence of the initial Bi2223 phase content on microstructure development in Bi2223/Ag tapes
AU - Grivel, Jean-Claude
AU - Yang, X P
AU - Abrahamsen, Asger Bech
AU - Han, Z
AU - Andersen, Niels Hessel
AU - von Zimmermann, M
PY - 2010
Y1 - 2010
N2 - (Bi,Pb)2Sr2Ca2Cu3O10 (Bi2223) Ag-sheathed tapes were produced from precursors containing various amounts of pre-reacted Bi2223 phase obtained by means of controlled calcinations of the starting powder mixture. The evolution of the critical current density during the first 20h of the first heat treatment follows closely that of the Bi2223 phase content. A maximum rate of increase is observed for precursor powders initially containing a small amount of Bi2223. The crystallinity of the Bi2223 phase along its c-axis improves with sintering time and is better in the tapes manufactured with precursor powders containing the largest amount of prereacted Bi2223. While the degree of preferential orientation of the Bi2223 phase at the Ag/ceramic core interface is not influenced by the initial Bi2223 phase content, the average texture in the ceramic core worsens with the increase of initial Bi2223 phase content. This effect is likely to play a role in the limited performance of Bi2223-rich precursors.
AB - (Bi,Pb)2Sr2Ca2Cu3O10 (Bi2223) Ag-sheathed tapes were produced from precursors containing various amounts of pre-reacted Bi2223 phase obtained by means of controlled calcinations of the starting powder mixture. The evolution of the critical current density during the first 20h of the first heat treatment follows closely that of the Bi2223 phase content. A maximum rate of increase is observed for precursor powders initially containing a small amount of Bi2223. The crystallinity of the Bi2223 phase along its c-axis improves with sintering time and is better in the tapes manufactured with precursor powders containing the largest amount of prereacted Bi2223. While the degree of preferential orientation of the Bi2223 phase at the Ag/ceramic core interface is not influenced by the initial Bi2223 phase content, the average texture in the ceramic core worsens with the increase of initial Bi2223 phase content. This effect is likely to play a role in the limited performance of Bi2223-rich precursors.
KW - Materials and energy storage
KW - Superconducting materials
KW - Superledende materialer
KW - Materialer og energilagring
U2 - 10.1088/1742-6596/234/2/022012
DO - 10.1088/1742-6596/234/2/022012
M3 - Conference article
SN - 1742-6596
VL - 234
SP - 022012
JO - Journal of Physics: Conference Series (Online)
JF - Journal of Physics: Conference Series (Online)
ER -