Method of preparing high-temperature superconducting wire.

摘要

Provided is a method for preparing an oxide high-temperature superconducting wire having a further improved critical current density. Raw material powder for a Bi-based oxide superconductor is charged in a metal sheath, and subjected to plastic working for obtaining a tape wire. The obtained tape wire is heat treated at a temperature of 600 to 800 DEG C, for example, forming no sintered body of the oxide superconductor, for 1 to 50 hours. Thereafter the heat treated wire is sintered at 830 to 860 DEG C. Due to the heat treatment in advance of the sintering, the finally obtained superconducting wire can be provided with a higher critical current density as compared with a case of carrying out no such heat treatment. <IMAGE>