BI2223 OXIDE SUPERCONDUCTOR AND METHOD FOR PRODUCING SAME

摘要

Disclosed is a Bi2223 oxide superconductor composed of Bi, Pb, Sr, Ln, Ca, Cu and O, wherein Ln is composed of one or more elements selected from among La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and Sr and Ln have a composition ratio described below. The Bi2223 oxide superconductor has a high critical current density in a low-temperature magnetic field and is able to maintain a high critical current density even at 77 K in a self magnetic field. Sr:Ln = (1 - x):x (0.002 = x = 0.015) Also disclosed is a method for producing a Bi2223 oxide superconductor, which comprises a step of ionizing a material that contains elements configuring the Bi2223 oxide superconductor in a solution, and a step of producing a powder that contains the atoms configuring the oxide superconductor by removing the solvent and performing a thermal decomposition reaction by spraying the solution into a high-temperature atmosphere.