Improvement in the $J_{\rm c}-B$ Characteristics of Ex-Situ ${\rm MgB}_{2}$ Tape With SiC Addition
Improvement in the $J_{\rm c}-B$ Characteristics of Ex-Situ ${\rm MgB}_{2}$ Tape With SiC Addition
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添加 SiC 的异位 ${ m MgB}_{2}$ 胶带的 $J_{ m c}-B$ 特性得到改善
DOI：
10.1109/tasc.2007.899102
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发表时间：
2007
影响因子：
1.8
通讯作者：
H. Kumakura
中科院分区：
文献类型：
--
作者：
T. Nakane;H. Kitaguchi;A. Matsumoto;H. Kumakura
利用原位MgB<sub> </sub>带芯制备的MgB<sub> </sub>粉末，提高了非原位管内粉末（PIT）技术制备的fe -护套MgB<sub >.2 </sub>带的强磁场J<sub>c</sub> - B性能。这项工作揭示了通过添加SiC纳米颗粒进一步改进。在4.2 K时，带的最高J<sub>c</sub>，值为4.6 × 10<sup> </sup> a /cm<sup>2</sup> （12 T时I<sub>c</sub> ap26 a）和9.7 × 10<sup>3</sup> a /cm<sup>2</sup> （10 T时I<sub>c</sub> ap 54 a）。这些值被认为是离地MgB<sub>2</sub>带的最高J<sub>c</sub>值。然而，它们低于原位MgB<sub> </sub>带（10 mol% SiC）的值（12 T时J<sub>c</sub> 6.3 × 103 A/cm<sup>2</sup> ap 43 A）和10 T时1.3 × 104 A/cm<sup>2</sup>: I<sub>c</sub> ap 88 A)。非原位MgB<sub>2</sub>磁带的J<sub>c</sub> -B性能较差的原因被认为是由于较低的B<sub>irr</sub>和较差的晶粒连通性。
The utilization of MgB<sub>2</sub> powder obtained from the core of in-situ MgB<sub>2</sub> tape improves the high magnetic field J<sub>c</sub> - B performance of Fe-sheathed MgB<sub>2</sub> tape fabricated via an ex-situ powder-in-tube (PIT) technique. This work reveals a further improvement by means of the addition of SiC nano particle. The highest J<sub>c</sub> at 4.2 K of the tape have a values of 4.6 x 10<sup>3</sup> A/cm<sup>2</sup> (I<sub>c</sub> ap26 A at 12 T) and 9.7 x 10<sup>3</sup> A/cm<sup>2</sup> (I<sub>c</sub> ap 54 A at 10 T) for the tape with 10 mol% SiC post-annealed at 700deg C. These values are believed to be the highest known J<sub>c</sub> values of ex-situ MgB<sub>2</sub> tape. However, they were lower than the values of in-situ MgB<sub>2</sub> tape with 10 mol% SiC (J<sub>c</sub> 6.3 X 103 A/cm<sup>2</sup> ap 43 A at 12 T and 1.3 x 104 A/cm<sup>2</sup> : I<sub>c</sub> ap 88 A at 10 T). The reason for the poorer J<sub>c</sub> -B performance of the ex-situ MgB<sub>2</sub> tape is thought to be due to a lower B<sub>irr</sub> and poorer grain connectivity.
芳烃添加对原位粉管加工 MgB2 带材的影响
DOI：
--
发表时间：
2006
期刊：
Supercond. Sci. Technol. Vol. 19
影响因子：
--
作者：
H. Yamada;M. Hirakawa;H. Kumakura;H. Kitaguchi
通讯作者：
H. Kitaguchi
影响因子：
4
作者：
Dou, SX;Soltanian, S;Tomsic, M
通讯作者：
Tomsic, M