Bi系銅酸化物超伝導体におけるカーボンナノチューブ混合による相構成の変化と電気伝導性への影響

抄録

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.