Agとの多層化によるBi2223酸化物伝導テープ材のJcの改善 Improvement of Critical Current Density of Bi2223 Superconducting Oxide Tapes by Multilayering with Ag
Ag/Bi2223 multilayered wires and tapes were prepared by the jelly roll method. The wires are composed of 2223 and Ag layers and exhibit supercondcutivitiy at temperatures above 77 K. The critical current density (Jc) of 3200A/cm<SUP>2</SUP> was obtained for the wire of 2 mm in diameter. The multilayered tapes consist of a highly oriented 2223 phase over the whole tape region. Jc of the multilayered tape increases with decreasing tape thickness and reaches a maximum value of 8200 A/cm<SUP>2</SUP> at 0. 25 mm in thickness. The Jc is further enhanced by the thermomechanical treatment and the high Jc of 17200 A/cm<SUP>2</SUP>, corresponding to Ic of 29. 2 A is attained. Moreover, the multilayered tape of 0. 25 mm in thickness is bent up to a bending strain of 0.6% without detriation of Jc. These results indicate that the multilayering with Ag is effective to improve Jc of the Bi2223 superconducting oxide wire.
粉体および粉末冶金 43(9), 1081-1086, 1996-09-15
Japan Society of Powder and Powder Metallurgy