|
篇目详细内容 |
【篇名】 |
High-density MgB2 superconducting bulk samples prepared at ambient pressure |
【刊名】 |
Frontiers of Physics in China |
【刊名缩写】 |
Front. Phys. China |
【ISSN】 |
1673-3487 |
【EISSN】 |
1673-3606 |
【DOI】 |
10.1007/s11467-007-0007-6 |
【出版社】 |
Higher Education Press and Springer-Verlag |
【出版年】 |
2007 |
【卷期】 |
2
卷1期 |
【页码】 |
81-84
页,共
4
页 |
【作者】 |
AN Ling;
CHEN Chin-ping;
LI Xing-guo;
FENG Qing-rong;
|
【关键词】 |
high-density MgB2 superconductor; magnesium vapor in all directions; sintering process |
【摘要】 |
High-density MgB2 (HD-MgB2) superconducting samples (D ≥ 2.2 g/cm3), using different sources of magnesium powder as raw material, were synthesized in ambient pressure in a rich Mg environment. The magnesium powders used in the fabrication process include nanometer-sized magnesium particles, powders from Alfa Aesar, ordinary off-the-shelf powder, and magnesium chip. The fabrication procedure involved a double-sintering process in a rich-Mg environment. A transition temperature Tc of 39 K was observed. Samples with the equally high density and matching superconducting properties were obtained as well by a triple sintering process of the MgB2 powder directly from Alfa Aesar. |
|