The influence of C 6 H 16 N 2 addition on the microstructural and superconducting properties of MgB 2 was systematically investigated. Unlike previously reported carbon sources, the C 6 H 16 N 2 additive had no effect on the lattice parameters of MgB 2 . However, the obvious improvement of critical current density ( J c ) was obtained for C 6 H 16 N 2 added MgB 2 without carbon substitution for boron. The average grain size was reduced with the addition of C 6 H 16 N 2 . Additionally, different numbers of spherical MgB 2 grains appeared inside the C 6 H 16 N 2 added MgB 2 . As the added amount of C 6 H 16 N 2 increased, the active cross-sectional area fraction ( A F ) values first increased then decreased. The possible reasons for these...

中文翻译：

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C 6 H 16 N 2中添加的MgB 2超导体中J c的增强，没有碳取代硼

系统地研究了C 6 H 16 N 2的添加对MgB 2的微结构和超导性能的影响。与以前报道的碳源不同，C 6 H 16 N 2添加剂对MgB 2的晶格参数没有影响。但是，对于添加了碳6 H 16 N 2的MgB 2却没有碳取代硼的情况，获得了临界电流密度（J c）的明显改善。通过添加C 6 H 16 N 2，平均晶粒尺寸减小。另外，在添加了C 6 H 16 N 2的MgB 2内部出现了不同数量的球形MgB 2晶粒。随着C 6 H 16 N 2的添加量增加，有效截面积分数（AF）值先增加然后减小。这些的可能原因...