Isothermal melt processing of Bi-2212 tapes

Isothermal melt processing (IMP) has been used to produce phase-pure, high critical current density (J/sub c/) Bi-2212 tapes at temperatures as low as 780/spl deg/C, Bi-2212 tapes processed by IMP have yielded J/sub c/ values up to 250 kA/cm/sup 2/ (I/sub c/=345 A) at liquid helium temperatures. Small test coils have been produced with J/sub c/ values up to… (More)