A process 1, further comprising annealing said superconducting phase at a temperature in the range of 250° {HEAD ~ 600° C.} in {TAIL ~ an oxygen atmosphere} 
in
A process 1 , further comprising annealing said superconducting phase at a temperature in the range of 250 ° { HEAD ~ 600 ° C. } in { TAIL ~ an oxygen atmosphere }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL