Investigation of Pb-free Bi-2223 high temperature sintering
| Autor: | H.A. Borges, E. Hering, J.H.G. Lima, A. Polasek, Luiz Antonio Saléh, E.T. Serra, G.S. de Oliveira, F. Rizzo |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Materials science
High-temperature superconductivity Dopant Scanning electron microscope Analytical chemistry Sintering Condensed Matter Physics Magnetic susceptibility Electronic Optical and Magnetic Materials law.invention Nuclear magnetic resonance law Phase composition X-ray crystallography Electrical and Electronic Engineering Volatility (chemistry) |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 15:3141-3144 |
| ISSN: | 2378-7074 1051-8223 |
| DOI: | 10.1109/tasc.2005.848743 |
| Popis: | 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 (Bi/sub 2.5/Sr/sub 1.9/Ca/sub 2.1/Cu/sub 3/O/sub x/). 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|