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

In this work, (Bi, Pb)(2)Sr2Ca2Cu3O10+delta 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 Bi2-xPbxSr2Ca2Cu3O10+delta (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 x 10(8) N m(-3) to 3.22 x 10(8) N m(-3), and the critical current density increased from 0.98 x 10(8) A m(-2) to 4.71 x 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.