Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1817922 | Physica C: Superconductivity and its Applications | 2013 | 4 Pages |
Abstract
MgB2 bulks were fabricated using milled precursor powders with aniline dopant and the low purity B was used as a starting material. The flux pinning, Bc2 and magnetic Jc of MgB2 are greatly enhanced by aniline doping. The magnetic Jc value of MgB2 sample with 3Â wt% aniline is 9.5Â ÃÂ 103Â AÂ cmâ2 at 5Â K and 6Â T, 13Â times larger than that of the pure one. Furthermore, the liquid aniline can avoid the agglomeration of precursor powder during high energy milling. Long time ball milling can further improve the electromagnetic properties of aniline doped MgB2 samples. At 5Â K and 6Â T, the Jc of the 80Â h 3Â wt% sample is up to 5.5Â ÃÂ 104Â AÂ cmâ2, 6Â times larger than that of the 0.5Â h 3Â wt% one and 77Â times larger than that of the 0.5Â h pure one (the “80Â h” and “0.5Â h” refer to ball milling times). These results indicate that the liquid C-containing dopant combined with high energy milling may be an effective way to achieve the excellent electromagnetic properties of MgB2.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Chengduo Wang, Dongliang Wang, Xianping Zhang, Chao Yao, Chunlei Wang, Yanwei Ma,