抄録
High-Tc superconducting Y-Ba-Cu-O films were prepared on some ceramic and metal substrates by pyrolisis of 2-etylhexanoates.
Only the films on MgO, yttria-stabilized zirconia (YSZ), Ag substrates showed the superconducting transition above liquid nitrogen temperature.
Transition temperature values (Tc) of films on MgO, YSZ, and Ag substrates were observed at 82K, 85K, and 82K respectively.
The important factors to prepare superconducting films on substrates are the reactivity and the difference of thermal expansion between films and substrates. And that of Y-Ba-Cu-O for MgO, YSZ, and Ag was quite appropriate.
In this process we were using a Ag tape for producting long superconducting tape and currently the flexible tape with Jc=3×103A/cm2 (at 77K) was obtained.
