Preparation of Superconducting Printed Thick Films of Bi-Sr-Ca-Cu-O and Bi-Pb-Sr-Ca-Cu-O Systems
The thick films of Bi-Sr-Ca-Cu-O and Bi-Pb-Sr-Ca-Cu-O systems were prepared on various substrates by a screen printing method. Superconducting properties in these thick films were examined as a function of powder preparations for pastes and postprinting annealing conditions. By appropriate heat treatments after printing for Bi systems, highly c-axis oriented thick films on (100) MgO substrate were obtained, which showed zero resistance at 107 K. For Bi-Pb systems, the powders contained the high-Tc phase of Bi systems in a large volume fraction were prepared for a printing paste. The films were screen printed using this paste, and then annealed. These films deposited on (100) MgO and Ag metal substrates showed zero resistance at 106 and 100 K, respectively.
KeywordsThick Film Heat Treatment Condition Large Volume Fraction Screen Printing Method Thick Film Technology
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