Development of ceramic partitioned Bi-2223 wires for AC power cable

Development of Bi-2223 Superconducting Wires for AC Applications

“…We have published the predicted properties of a compact HTS cable based on our previous calculations using a simple model [7]. Those estimations suggest that the AC losses of tapes should be reduced to at least one third of those in the fully coupled tapes for a 3 kA class cable.…”

Improvement of multiple oxide properties: effect of gel processes on the quality of Bi2Sr2CaCu2O8 + δ superconducting powders

“…[16][17][18][19] Bi 2 Sr 2 Ca nÀ1 Cu n O 2n + 4 (n ¼ 1, 2, 3) superconductors, a typical multi-component compound, are potential material for manufacturing magnetic shields, 20,21 current leads, 22,23 and other superconducting devices. [24][25][26][27] However, it is hard to improve Bibased superconductor phase purity, which is closely associated with the performance of superconducting devices, 28,29 because it is a non-stoichiometric compound and the preparation conditions are very critical in order to avoid the formation of intergrowth phase and impurity, which degrades the transition temperature. The volume fraction of Bi2223 prepared by sol-gel method is only about 70%.…”

Formation of Submicron-Thick Oxide Barrier for Reducing AC Loss in Multifilamentary Bi2223 Tapes

“…One solution to reduce such coupling loss is to surround simply the superconducting filaments with high-resistive materials. Ceramics have been examined as barrier material by many investigators; BaZrO3 and SrZrO3 [1], SrCO3 [2], [3]. Many attempts however, resulted in the fact that the coupling current loss characteristics could be improved appreciably, but the transport critical current degraded and the fabrication of long length tape was very much limited.…”