Ex situ fabrication of MgB2/Al tapes with high critical current density
Ex situ fabrication of MgB2/Al tapes with high critical current density
复制标题
高临界电流密度MgB2/Al带材的异位制造
DOI：
10.1088/0953-2048/19/6/020
复制
发表时间：
2006
影响因子：
3.6
通讯作者：
H. Kumakura
中科院分区：
文献类型：
--
作者：
T. Nakane;H. Kitaguchi;H. Kumakura
我们已经大大提高了临界电流密度，Jc，在外加磁场，B，铝护套MgB 2磁带。我们的MgB 2/Al带材，由从原位粉末管（PIT）加工带材的芯获得的MgB 2粉末制成，通过非原位PIT方法制造，没有热处理和添加剂化合物。在10 T和4.2 K下获得的最高Jc为880 A cm−2。该值超过了由商业MgB 2粉末制成的常规非原位制造的MgB 2/Al带材。这种非原位制造的MgB 2带的Jc-B性能的改善被认为是由于MgB 2芯的磁不可逆性场的显著改善。MgB 2和Al鞘层都显示出低密度和低诱导放射性。我们的实验数据表明，使用铝作为鞘材料的MgB 2磁带的磁带的特定应用，如在聚变反应堆和板载磁铁的巨大潜力。
We have considerably improved the critical current density, Jc, in applied magnetic fields, B, of Al-sheathed MgB2 tape. Our MgB2/Al tape, made with MgB2 powder obtained from the core of an in situ powder-in-tube (PIT) processed tape, was fabricated via an ex situ PIT method without heat treatment and additive compounds. The highest Jc obtained at 10 T and 4.2 K was 880 A cm−2. This value exceeds that of conventional ex situ fabricated MgB2/Al tapes made from commercial MgB2 powder. The improvement in the Jc-B performance of this ex situ fabricated MgB2 tape is considered to be due to a significant improvement in the magnetic irreversibility field of the MgB2 cores. Both the MgB2 and the Al sheath show a low density and a low induced radioactivity. Our experimental data obtained using Al as the sheath material of the MgB2 tape indicate the great potential of the tape for specific applications, such as in fusion reactors and on-board magnets.