Fabrication and Properties of Superconducting Ba-Y-Cu-O and Bi-Ca-Sr-Cu-O Tapes
Ba2YCu3Oy green tapes were fabricated by a doctor blade method and sintered at temperatures ranging from 910 to 1010C to examine the effect of sintering temperature on their properties. The tape sintered at 930 C showed the largest critical current density (Jc) of 1500 A/cm2 at 77 K. It was concluded that the Jc of our tapes are determined by the compromise of porosity, portion of superconducting phase and the loss of contact at the grain boundary.
Bi-Ca-Sr-Cu-0 green tapes were also fabricated by a doctor blade method from powders with nominal composition of Bi1.4Pb0.6Ca2Sr2Cu3.6Oy. The tape with the critical temperature (Tc) of 106K and Jc of 100 A/cm2 at 77K was obtained by sintering green tape made of the powder containing high critical temperature phase.
KeywordsSinter Temperature Critical Current Density Peak Height Ratio Green Tape Auger Electron Spectrum
Unable to display preview. Download preview PDF.