Synthesis of Bi-Base High-<I>T</I><SUB>c</SUB> Oxide Superconductors through an Organic Acid Salt Thermal Decomposition Process

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High-Tc Bi–Pb–Sr–Ca–Cu oxide superconductors have been successfully synthesized through a decomposition of organic acid salts. At the intermediate stage of this process, a gel state is obtained from a homogeneous solution. The gel shows a thermoplasticity which may facilitate its fabrication into a fiber form. The offset Tc of the specimen made from this process is 102 K, which is appreciably improved by an intermediate pressing between sinterings. The highest Tc and Jc (77 K, 0 T) so far obtained are 109 K and 810 A/cm2, respectively.

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