Synthesis of 2223-Phase BSCCO Based on Liquid-Phase Method and Its Magnetic Properties

In this work, (Bi, Pb) 2 Sr 2 Ca 2 Cu 3 O 10+ δ superconducting nano-network was successfully synthesized based on liquid-phase method via electrospinning and followed calcinations. The effect of plumbum (Pb) replacing bismuth (Bi) and the superconductivity of Bi 2- x Pb x Sr 2 Ca 2 Cu 3 O 10+ δ ( x = 0, 0.1, 0.2, 0.3, 0.4, and 0.45) nano-networks were studied. With the increase of the ratio of Pb, it was found that the relative volume fraction of the Bi-2223 phase increased from 53.50 to 93.98%, the pinning force increased from 0.66 × 10 8 N m −3 to 3.22 × 10 8 N m −3 , and the critical current density increased from 0.98 × 10 8 A m −2 to 4.71 × 10 8 A m −2 . By fitting the dominant magnetic flux pinning mechanism, it was also found that the addition of Pb can improve the pinning center of Bi-2223 phase. These results indicate that the addition of Pb is beneficial to improve the fraction of superconducting Bi-2223 phase. The optimal superconductor pinning structure has been obtained because the pinning centers are created by substituting Pb for Bi.