Research status of the manufacturing technology and application properties of Bi-2223/Ag tapes at Innost

摘要

The first production line of Bi-2223/Ag tapes in China has been installed in the end of 2001 with an annual production capacity of 200 km at Innova Superconductor Technology Co., Ltd. (Innost). Bi-2223/Ag tapes can be manufactured reproducibly with length up to 1 km, critical current I-c over 90 A (77 K, 0 T) and engineering critical current density J(e) over 9 kA/cm(2). Innost's Bi-2223/Ag tapes are being used for producing China's first HTS power cable system (30 in. 3 phase, 35 kV/25 kA), which will be put into trial operation next year. Also, Innost's products will be used for other research projects of HTS applications such as HTS motor, HTS magnet and HTS transformer in China. In order to meet the requirements of HTS applications, tremendous research efforts have been made not only in enhancing the performance and uniformity of the Bi-2223/Ag tapes, but also in improving their application properties, which include reducing AC losses and thermal conductivity, increasing insulating properties and so on. Methods for improving productivity and yield will be also introduced. (C) 2004 Elsevier B.V. All rights reserved.