Addition of nanometer Al2O3 during the final processing of (Bi,Pb)-2223 superconductors

作者：Annabi M; M'chirgui A^*; Ben Azzouz F; Zouaoui M; Ben Salem M

来源：Physica C-Superconductivity and Its Applications, 2004, 405(1): 25-33.

DOI：10.1016/j.physc.2004.01.012

• (Bi,Pb)-2223
• nanometer Al2O3
• critical current density

Nanometer Al2O3 particles were added to (Bi,Pb)(2)Sr2Ca2Cu3O3 (Bi-2223) precursor powders during the final sintering cycle of a multi-step preparation process. The influence of Al2O3 on the melting temperature, high-T-c (Bi-2223) phase formation, microstructure and transport properties of ceramics was studied by means of DTA, XRD, SEM/ EDX, electrical and magnetic measurements. We report that the addition of a small amount of Al2O3 (0.2 wt.%) increased the pellet's critical current density, J(c) at 77 K by similar to30% and improved J(c) behaviour in applied magnetic field either parallel or perpendicular to the sample wide surface (SWS). The results indicate that the introduction of a proper amount of nano-Al2O3 particles during the final processing of BPSCCO samples can effectively improve the flux pinning ability and has a little detrimental effect on the (Bi,Pb)-2223 formation process.

• 出版日期2004-5-15