Akademik Veri Yönetim Sistemi
Journal of Magnetism and Magnetic Materials, cilt.324, sa.21, ss.3455-3459, 2012 (SCI-Expanded)
The effect of aromatic hydrocarbon (benzene, C 6H 6) addition on lattice parameters, microstructure, critical temperature (T c), critical current density (J c) of bulk MgB 2 has been studied. In this work only 2 mol% C 6H 6 addition was found to be very effective in increasing the J c values, while resulting in slight reduction of the T c. J c values of 2 mol% C 6H 6 added MgB 2 bulks reached to 1.83×10 6 A/cm 2 at 15 K and 0 T. Microstructural analyses suggest that J c enhancement is associated with the substitution of carbon with boron and which also results in the smaller MgB 2 grain size. The change in the lattice parameters or the lattice disorder is claimed as a cause of the slight reduction in the T c by carbon addition. We note that our results show the advantages of C 6H 6 addition include homogeneous mixing of precursor powders, avoidance of expansive nanoadditives, production of highly reactive C, and significant enhancement in J c of MgB 2, compared to un-doped samples. © 2012 Elsevier B.V.