The Change of Assembly and the Effect of Carbon-Nano-Tube Mixing on the Electric Conductivity in Bi₂Sr₂Ca₂Cu₃O_y Superconductors

Abstract

In order to improve pinning properties of bulk Bi₂Sr₂Ca₂Cu₂O_y (Bi2223) materials, samples of both pure Bi-2223 and Bi2223 with carbon nanotubes (CNT) embedded have been prepared by solid state reaction method. The parent samples mixed with 0∼5wt% of CNT were heated at 800°C for 24h in air or N₂ atomosphere. We could not find any great improvement of critical current density J_c due to reduction property of CNT.