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Ultrafine MgO particles were introduced into Bi 2 Sr 2 Ca 2 Cu 3 O 10 /Ag (Bi-2223/Ag) tapes fabricated by the standard powder-in-tube (PIT) process. It was found that the phase transformation rate is decreased with increasing MgO concentration. Slight degradation of Bi-2223 formation rate is suggested to be of advantage for grain connectivity and grain...
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