Abstract
High- T c superconducting oxide films in the Bi(Pb)CaSrCuO system have been prepared from metal-alkoxides stabilized with amines, and their formation process has been studied. Films of the composition Bi 2Ca 2Sr 2Cu 3O x were formed on MgO single crystal substrates by the dip-coating method and calcined at 820°C for 15 min. The above process was repeated about twenty times and then, as a final step, sintered at 850–870°C. Films sintered at 860°C for 20 h were strongly orientated with the c-axis perpendicular to the substrate and exhibited T c (zero) at 86 K. The substitution for part of the Bi with Pb showed a tendency for T c (zero) to shift toward higher temperatures, whereas the 110 K phase was not obtained.
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