Ahn Jung-Ho
Department of Materials Engineering, Andong National University, Andong 760-749, Korea.
J Nanosci Nanotechnol. 2012 Feb;12(2):1310-3. doi: 10.1166/jnn.2012.4640.
We have synthesized FeSe0.5Te0.5 superconductors by high-energy ball-milling and subsequent annealing. High-energy ball-milling of elemental powder mixtures resulted in the formation of metastable and/or nanocrystalline phases. Both XRD and DSC results show that the ball-milled powers were completely transformed to FeSe0.5Te0.5 with the grain size of a few nanometers during sintering at low temperatures. The resulting materials exhibited superconducting transition at 14 K. The enhancement of critical current density was observed for the high-energy ball-milled powder, compared with the un-milled powders.
我们通过高能球磨和后续退火合成了FeSe0.5Te0.5超导体。对元素粉末混合物进行高能球磨导致形成亚稳相和/或纳米晶相。XRD和DSC结果均表明，在低温烧结过程中，球磨后的粉末完全转变为粒径为几纳米的FeSe0.5Te0.5。所得材料在14 K时呈现超导转变。与未球磨的粉末相比，高能球磨粉末的临界电流密度有所提高。
