The preparation of textured thick films of the 2212 phase in the BSCCO and BPSCCO systems by a partial melting process of powders deposited on Ag substrates by drying alcoholic suspensions is reported. The quality of the films in the BPSCCO system can be improved as far as microstructure and electrical properties is concerned, by starting from non-stoichiometric compositions, in particular by adding PbO to 2212 BSCCO powders. The influence of the PbO addition on structural, electrical and magnetic properties is discussed. Very high critical current densities (5 x 10(6)-9 x 10(6) A cm-2 at 10 K and for H = 5 kOe), comparable to or quite greater than those reported for single crystals, can be obtained by this new preparation method.
Dimesso, L., Francesconi, M.g., Calestani, G., Silva, E., Fastampa, R., Marcon, R., et al. (1991). PREPARATION AND CHARACTERIZATION OF TEXTURED THICK-FILMS OF THE 2212-PHASE IN THE BSCCO AND BPSCCO SYSTEMS. PHYSICA. C, SUPERCONDUCTIVITY, 176(1-3), 216-226 [10.1016/0921-4534(91)90716-C].
PREPARATION AND CHARACTERIZATION OF TEXTURED THICK-FILMS OF THE 2212-PHASE IN THE BSCCO AND BPSCCO SYSTEMS
SILVA, Enrico;
1991-01-01
Abstract
The preparation of textured thick films of the 2212 phase in the BSCCO and BPSCCO systems by a partial melting process of powders deposited on Ag substrates by drying alcoholic suspensions is reported. The quality of the films in the BPSCCO system can be improved as far as microstructure and electrical properties is concerned, by starting from non-stoichiometric compositions, in particular by adding PbO to 2212 BSCCO powders. The influence of the PbO addition on structural, electrical and magnetic properties is discussed. Very high critical current densities (5 x 10(6)-9 x 10(6) A cm-2 at 10 K and for H = 5 kOe), comparable to or quite greater than those reported for single crystals, can be obtained by this new preparation method.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
