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