Oxide barriers and their effect on AC losses of Bi,Pb(2223) multifilamentary tapes
Oxide barriers and their effect on AC losses of Bi,Pb(2223) multifilamentary tapes
复制标题
氧化物阻挡层及其对 Bi,Pb(2223) 复丝带交流损耗的影响
DOI：
10.1109/77.783508
复制
发表时间：
1999
影响因子：
1.8
通讯作者：
K. Kwasnitza
中科院分区：
文献类型：
--
作者：
Y.B. Huang;M. Dhallé;F. Marti;G. Witz;R. Flukiger;S. Clerc;K. Kwasnitza
在引入惰性氧化物阻挡层后，多丝Ag/Bi,Pb(2223)带材的横向电阻率显著提高。这是一个新概念，即每根单丝都被一层厚度小于2μm的高阻BaZrO₃层包围。利用这些氧化物阻挡层，我们到目前为止已经将交流损耗最大值从5Hz移到了大于100Hz。这相当于交流耦合损耗的显著降低。这些带材在77K、0T时的最高临界电流密度实际上是15000A/cm²，即仍然低于我们无阻挡层的带材（35000A/cm²）。本文描述了制备具有氧化物阻挡层的Bi,Pb(2223)带材的工艺过程，重点介绍了我们实验室为制备长多丝Bi,Pb(2223)带材而开发的新变形工艺，包括四辊（或双轴）轧制和周期性压制。考虑到其在变压器和电缆中的应用，所开发的具有氧化物阻挡层的带材是有前景的。
The transverse electrical resistivity in multifilamentary Ag/Bi, Pb(2223) tapes is considerably enhanced after introducing inert oxide barriers, a new concept in which each single filament is surrounded by a highly resistive BaZrO/sub 3/ layer of <2 /spl mu/m thickness. With these oxide barriers, we have so far obtained a shift of the AC loss maximum from 5 Hz to >100 Hz. This corresponds to a marked lowering of AC coupling losses. The highest critical current density of these tapes is actually 15000 A/cm/sup 2/ at 77 K, 0 T, i.e. still below that of our tapes without barriers (35000 A/cm/sup 2/). The fabrication processes leading to Bi,Pb(2223) tapes with oxide barriers is described, with an emphasis on new deformation processes developed in our laboratory for the fabrication of long multifilamentary Bi,Pb(2223) tapes, comprising four roll (or two-axes) rolling and periodic pressing. The developed tapes with oxide barriers are promising in view of their use in transformers and cables.