Preparation and Magnetic Properties of BSCCO Superconducting Nanofibers by Electrospinning and Solution Blowing Spinning

In this work, we compared Bi2Sr2CaCu2O8+θ (BSCCO) superconducting nanofibers prepared by electrospinning (ES) and solution blowing spinning (SBS) techniques for the first time. The differences in microstructure and magnetic properties of BSCCO superconducting fibers prepared by ES and SBS were investigated. The thickness of the ES-BSCCO nanofibers was more uniform than that of the SBS-BSCCO nanofibers. In addition, the superconducting transition temperature of superconducting SBS-BSCCO nanofibers was only 73.5 K due to the weak connection of grains, which was lower than 82.5 K of the ES-BSCCO sample. Further studies showed the area enclosed by the hysteresis loop, the critical current density, and the intensity of the pinning force of SBS-BSCCO fibers were all smaller than those of the ES-BSCCO sample. Finally, we found that the pinning mechanism of these two BSCCO samples could be ascribed to the activation of the point-pinning mechanism and surface-pinning mechanism.