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http://dx.doi.org/10.9714/psac.2007.9.2.015

Fabrication and superconducting property of $MgB_2$ tape with Al metal powder addition  

Ko, Jae-Woong (Korea Institute of Machinery and Materials)
Yoo, Jai-Moo (Korea Institute of Machinery and Materials)
Chung, Kuk-Chae (Korea Institute of Machinery and Materials)
Kim, Young-Kuk (Korea Institute of Machinery and Materials)
Wang, Xiaolin (Institute for Superconducting and Electronic Materials, Univ, of Wollongong)
Dou, Shi Xue (Institute for Superconducting and Electronic Materials, Univ, of Wollongong)
Yoo, Sang-Im (Seoul National University)
Chung, Woo-Hyun (KISWEL)
Publication Information
Progress in Superconductivity and Cryogenics / v.9, no.2, 2007 , pp. 15-18 More about this Journal
Abstract
The sub micron sized spherical $MgB_2$ powders were synthesized by spray reaction method. $MgB_2$ tapes with Al addition were fabricated by Powder in Tube (PIT) method. The superconducting property and microstructure of Al doped $MgB_2$ tapes were characterized by X-ray diffraction, optical microscopy and transport measurement under magnetic field. The $J_c$ value of $MgB_2$ tapes was increased with 10 vol. % Al addition. The $J_c$ value of 5,500 A/$cm^2$ and 11,000 A/$cm^2$ at 4.2 K and 5 T were obtained for the $MgB_2$ tape and 10 vol. % of Al added $MgB_2$ tape without heat treatment, respectively. The $J_c$ value of 8,000 A/$cm^2$ and 33,000 A/$cm^2$ at 4.2 K and 5 T were obtained for the $MgB_2$ tape and 10 vol. % of Al added $MgB_2$ tape with heat treatment, respectively. The $J_c$-B curves show enhancement in $J_c$ (B), which suggests that the microstructure and transport properties of $MgB_2$ tapes have been improved with Al addition.
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