Improved irreversibility behavior and critical current density in MgB2-diamond nanocomposites
Improved irreversibility behavior and critical current density in MgB2-diamond nanocomposites
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DOI：
10.1063/1.1606884
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发表时间：
2003-02
影响因子：
4
通讯作者：
Y. Zhao;Y. Zhao;C. H. Cheng;C. H. Cheng;X. Rui;H. Zhang;Paul G Munroe;H. Zeng;N. Koshizuka-N.-Kosh
中科院分区：
文献类型：
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作者：
Y. Zhao;Y. Zhao;C. H. Cheng;C. H. Cheng;X. Rui;H. Zhang;Paul G Munroe;H. Zeng;N. Koshizuka-N.-Kosh
通过添加纳米金刚石粉，制备了纳米复合超导体。微观结构分析表明，纳米复合超导体由紧密堆积的纳米颗粒(∼50~100 nm)和高度分散、均匀分布的金刚石纳米颗粒(∼10~20 nm)组成。与用其他方法制备的块体材料相比，该材料的JC-H和HIIR-T特性有了显著的改善。在20K和4T下的Jc值为1×104A/cm2，在20K时的Hirr值为6.4T。
MgB2-diamond nanocomposite superconductors have been synthesized by addition of nanodiamond powder. Microstructural analysis shows that the nanocomposite superconductor consists of tightly packed MgB2 nanograins (∼50–100 nm) with highly dispersed and uniformly distributed diamond nanoparticles (∼10–20 nm) inside the grains. The Jc–H and Hiir–T characteristics have been significantly improved in this MgB2-diamond nanocomposite, compared to MgB2 bulk materials prepared by other techniques. Also, the Jc value of 1×104 A/cm2 at 20 K and 4 T and the Hirr value of 6.4 T at 20 K have been achieved.