Improvement in the critical current density of ex situ powder in tube processed MgB2 tapes by utilizing powder prepared from an in situ processed tape
Improvement in the critical current density of ex situ powder in tube processed MgB2 tapes by utilizing powder prepared from an in situ processed tape
复制标题
利用原位加工带制备的粉末提高管加工 MgB2 带中异位粉末的临界电流密度
DOI：
10.1063/1.2163498
复制
发表时间：
2006
影响因子：
4
通讯作者：
H. Kumakura
中科院分区：
文献类型：
--
作者：
T. Nakane;H. Kitaguchi;H. Kumakura
我们使用实验室制备的Fe护套和MgB2粉末，显著提高了采用非原位管内粉末（PIT）工艺制备的MgB2带在外加磁场中的临界电流密度（Jc）。该技术的起始粉末是由MgH2和非晶硼的混合物通过原位PIT工艺制备的MgB2带芯获得的。10 T时最高Jc为6.1×103A∕cm2。该值不仅超过了传统的由商业MgB2粉末制成的非原位MgB2带，也超过了用MgH2制成的原位MgB2带（3.4×103A∕cm2）。这些实验数据表明，如果改善起始粉的质量，非原位MgB2带具有很大的潜力来提高其Jc - B性能。
We dramatically improved the critical current density, Jc, in applied magnetic fields, B, of MgB2 tapes fabricated via an ex situ powder-in-tube (PIT) process using an Fe sheath and MgB2 powder prepared in lab. The starting powder for this technique was obtained from the core of an MgB2 tape prepared via an in situ PIT process using a mixture of MgH2 and amorphous boron. The highest Jc at 10 T was 6.1×103A∕cm2. This value exceeds not only that of conventional ex situ MgB2 tapes made from commercial MgB2 powder but also that of in situ MgB2 tapes fabricated using MgH2(3.4×103A∕cm2). These experimental data indicate that ex situ MgB2 tapes have great potential to upgrade the Jc‐B property if the quality of the starting powder is improved.