Title :
Investigation of Pb-free Bi-2223 high temperature sintering
Author :
Polasek, A. ; Saleh, L.A. ; Borges, H. ; Hering, E. ; de Oliveira, G.S. ; Serra, E.T. ; Lima, J.H.G. ; Rizzo, F.
Author_Institution :
CEPEL - Electr. Power Res. Center, Rio de Janeiro, Brazil
fDate :
6/1/2005 12:00:00 AM
Abstract :
The Bi-2223 performance could be significantly improved by melt processing. However, it is a very difficult task, partly due to the volatility of Pb, its main dopant. On the other hand, it is also a hard task to obtain high Pb-free 2223 amounts, even by sinterization using a primary phase field composition (Bi2.5Sr1.9Ca2.1Cu3Ox). In the present work, we investigate the sinterization of Pb-free 2223 in the presence of appreciable liquid fractions. The samples were analyzed by XRD, SEM/EDS and Magnetic Susceptibility. The results show significant Pb-free 2223 amounts after sintering at temperatures close to the melting. Such investigation represents an additional step toward the elucidation of the Pb-free 2223/melt equilibrium.
Keywords :
X-ray diffraction; bismuth compounds; calcium compounds; high-temperature techniques; magnetic susceptibility; melt processing; scanning electron microscopy; sintering; strontium compounds; superconducting materials; BiPbSr2Ca2Cu3O10; Pb-free Bi-2223; X-ray diffraction; high temperature sintering; magnetic susceptibility; melt equilibrium; melt processing; primary phase field composition; scanning electron microscopy; Brazil Council; Helium; Magnetic analysis; Magnetic susceptibility; Melt processing; Microstructure; Scanning electron microscopy; Silver; Temperature measurement; X-ray scattering; High temperature sintering; Pb-free Bi-2223; melt processing;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.848743
