2026-03-09T09:17:42Z https://air.repo.nii.ac.jp/oai

oai:air.repo.nii.ac.jp:00000694 2024-08-25T18:11:40Z 590:629:630

Formation and Texture of Bi-2223 Phase During Sintering in a Temperature Gradient Lu, X. Y. Nagata, A. Watanabe, K. Nojima, T. Sugawara, K. Hanada, S. Kamada, S. Lu, Xiaoye Bi-2223 Superconductors Temperature gradient Magnetic field sintering The formation and texture of Bi-2223 phase during sintering in a temperature gradient were investigated. Co-precipitated powders with the composition of Bi:Pb:Sr:Ca:Cu = 1.85:0.35:1.90:2.05:3.05 were used. Samples set on a silver holder were sintered at 850℃ for 120 h in a vertical tube furnace with a temperature gradient of 15℃/cm installed in a solenoid-type superconducting magnet. A vertical magnetic field can be applied parallel to the long axis of the furnace. It has been found that the Bi-2223 grains with their c-axis parallel to the axial direction of the vertical tube furnace are formed not only on the surface, but also in the center of the sample sintered at 850℃ for 120 h in 15℃/cm temperature gradient without magnetic field. Moreover, the sample sintered in the temperature gradient and in a 10 T magnetic field have a stronger c-axis alignment of Bi-2223 phase. It is suggested that both the temperature gradient and magnetic field during sintering are favorable for the c-axis alignment of Bi-2223 phase. journal article Elsevier 2004-10-01 AM application/pdf Physica C 412-414 602 606 https://air.repo.nii.ac.jp/record/694/files/lu-air1.pdf http://hdl.handle.net/10295/421 https://air.repo.nii.ac.jp/records/694 eng https://doi.org/10.1016/j.physc.2004.01.080 open access