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首页> 外文期刊>Physica, C. Superconductivity and its applications >Synthesis and properties of Mg(1-x)CuxB2 bulk obtained by self-propagating high-temperature synthesis (SHS) method at low temperature
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Synthesis and properties of Mg(1-x)CuxB2 bulk obtained by self-propagating high-temperature synthesis (SHS) method at low temperature

机译：自蔓延高温合成（SHS）法低温合成Mg（1-x）CuxB2块体的合成及性能

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摘要

Synthesis and properties of Mg(1-x)CuxB2 bulk samples obtained by self-propagating high-temperature synthesis (SHS) method at low temperature are presented. The best preheating temperature T-0 is from 250 degrees C to 350 degrees C. We found that the part of Cu atoms may be introduced into the lattice of MgB2 to replace the Mg atoms and the other of Cu atoms forms MgCu2. The critical temperature T-c is 36.5 K in Mg0.8Cu0.2%B2 and the width of transition is less than 0.3 K. The Mg0.8Cu0.2B2 sample shows the highest J(c) of 6.7 x 10(5) A/cm(2) under 0.5 T (Tesla) at 10 K and 5.0 x 10(5) A/cm(2) in self-field at 20 K. The significant enhancement of J(c) in Cu-doped samples may be caused by good grain connection, the reduction of grain size and small MgCu2 particles in the sample. This technique has a great potential to prepare high performance MgB2 bulk samples and wires by Cu doping on an industrial scale. (c) 2005 Elsevier B.V. All rights reserved.
机译：介绍了通过自蔓延高温合成（SHS）方法在低温下获得的Mg（1-x）CuxB2块状样品的合成和性能。最佳预热温度T-0为250摄氏度至350摄氏度。我们发现部分Cu原子可能被引入MgB2的晶格中以替代Mg原子，而另一部分Cu原子形成MgCu2。临界温度Tc在Mg0.8Cu0.2％B2中为36.5 K，转变宽度小于0.3K。Mg0.8Cu0.2B2样品的最高J（c）为6.7 x 10（5）A / cm （2）在10 K下的0.5 T（Tesla）和20 K下的自电场下的5.0 x 10（5）A / cm（2）下。掺杂Cu的样品中J（c）的显着增强可能是由于良好的晶粒连接，减小晶粒尺寸和样品中的MgCu2小颗粒。该技术在工业规模上通过铜掺杂制备高性能MgB2块状样品和金属线具有巨大潜力。 （c）2005 Elsevier B.V.保留所有权利。

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