Improved Pinning Effects in Ball-Milled \hbox Bulks Containing Glycine by Introducing Shedding Impurities From Agate Balls

MgB 2 samples containing 3 wt% glycine were prepared from milled B powders and were sintered at 800°C for 30 min. Ball milling, through the interaction with the SiO 2 milling media, led to the formation of Mg 2 Si pinning centers, which inhibited grain growth and thereby increased the grain boundary...

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Veröffentlicht in:	IEEE transactions on applied superconductivity 2013-12, Vol.23 (6), p.80-85
Hauptverfasser:	Yang, Zesen, Cai, Qi, Liu, Yongchang, Ma, Zongqing, Li, Huijun
Format:	Artikel
Sprache:	eng
Schlagworte:	Ball milling critical current density Critical current density (superconductivity) extrinsic pinning centers Flux pinning hbox{MgB}_{2} superconductor Impurities Magnesium compounds Milling Powders
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