کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1800765 | 1024545 | 2012 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Microstructural and superconducting properties of C6H6 added bulk MgB2 superconductor Microstructural and superconducting properties of C6H6 added bulk MgB2 superconductor](/preview/png/1800765.png)
The effect of aromatic hydrocarbon (benzene, C6H6) addition on lattice parameters, microstructure, critical temperature (Tc), critical current density (Jc) of bulk MgB2 has been studied. In this work only 2 mol% C6H6 addition was found to be very effective in increasing the Jc values, while resulting in slight reduction of the Tc. Jc values of 2 mol% C6H6 added MgB2 bulks reached to 1.83×106 A/cm2 at 15 K and 0 T. Microstructural analyses suggest that Jc enhancement is associated with the substitution of carbon with boron and which also results in the smaller MgB2 grain size. The change in the lattice parameters or the lattice disorder is claimed as a cause of the slight reduction in the Tc by carbon addition. We note that our results show the advantages of C6H6 addition include homogeneous mixing of precursor powders, avoidance of expansive nanoadditives, production of highly reactive C, and significant enhancement in Jc of MgB2, compared to un-doped samples.
Journal: Journal of Magnetism and Magnetic Materials - Volume 324, Issue 21, October 2012, Pages 3455–3459