【摘要】 研究了用粉末装管技术制备磁体用多芯Bi－2223／Ag超导带材的工艺和性能。结果表明，得到的氧化物芯丝均匀的多芯Bi－2223／Ag超导带材，其Bi－2223单相性较好巨晶粒具有c轴取向。在77K，OT下，短带的临界电流密度Jc达2．2×104A／cm2（判据1μV／cm）。用此带制做的小型超导磁体（外径为85mm，内径10mm，高60mm），在4．2K和77K下，磁体通过的；临界电流Ic分别为135A和17A（判据1μV／cm），对应此电流，该磁体产生的磁场分别为1．04T和0．13T。更多还原

【Abstract】 The fabrication and properties of powder-in-tube (PIT) multifilamentary Bi-2223/Ag superconducting tapes for magnets have been studied. Scanning electron microscopy (SEM) and Energy diffraction X -ray analysis (EDXA) reveal that the alkaline earth cuprate, for example (Sr, Ca)2CuOx, distributes uniformly within the Bi-2223/Ag phase. X-ray diffraction patterns show that the Bi-2223 is mostly single-phase and well-aligned. Critical current density (Jc) up to 2. 2 ×104A/cm2 at 77K, OT has been achieved for short tapes. A small superconducting magnet made form the tapes, which has overall dimensions of 85mm outer diameter, 10mm clear bore and 60mm height, has generated fields of 1. 04T and 0. 13T at 4. 2K and 77K, respectively.更多还原