PROPERTIES OF BI-PB-SR-CA-CU-O GLASS-CERAMIC FIBERS FORMED BY GLASS-DRAWING METHOD

Flexible Bi-Pb-Sr-Ca-Cu-O glass fibers were prepared by the glass-drawing method. They showed superconducting properties after crystallization by heat treatment. The Tc and Jc values of the fibers were very sensitive to starting compositions and heat treatment conditions. The fiber with the starting composition of Bi2.1Pb0.9Sr2Ca2Cu3Oy showed superconductivity with a Jc=1480 A/cm2 (77 K, zero magnetic field).