A high-Tc superconducting tape joint between two Ag-clad Bi-2223 tapes has been fabricated and characterized. Two pre-sintered tapes with one side of the silver striped were lapped and then wrapped by a silver foil. The complex was uniaxially pressed and followed by appropriate sintering to form a high-Tc superconducting tape joint. Transport critical current through the joint (Icj) was determined at liquid nitrogen temperature. It was found that the ratio of critical currents through the joint to that of the tape, Icj/Ic, depended on the uniaxial pressure and the sintering conduction. For a test sample, Icj/Ic reached 99%. Persistent current loops formed by Bi-2223 tapes have also been fabricated and tested. Joint resistance of a loop was determined to be ∼ 4 × 10-13 Ω after the initial decay time of 2 minutes.
|Number of pages||4|
|Journal||Chinese Journal of Physics|
|Issue number||2 II|
|Publication status||Published - 1996 Dec 1|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)