发明名称 |
Intermetallic compound superconducting material comprising magnesium and beryllium and alloy superconducting material containing the intermetallic compound |
摘要 |
There are provided an intermetallic-compound superconductor that is high in superconducting transition temperature, and an alloy superconductor that is high in superconducting transition temperature and excels in malleability and ductility, as well as a method of making such a superconductor with good reproducibility and at a low cost of manufacture. This entirely new intermetallic compound superconductor is made of magnesium (Mg) and beryllium (Be) and has a chemical composition expressed by formula: Mg<SUB>1</SUB>Be<SUB>2</SUB>, has a hexagonal AlB<SUB>2 </SUB>type crystallographic structure and has a superconducting transition temperature (T<SUB>c</SUB>) of 35 K. An alloy containing this intermetallic compound excels in malleability and ductility and constitutes the alloy superconductor having a superconducting transition temperature (T<SUB>c</SUB>) of 35 K and being low in specific resistance for normal conduction at a temperature ranging from the superconducting transition temperature to a room temperature. In the method of manufacture, a Mg containing feedstock powder and a Be containing feedstock powder are mixed together to form a mixture thereof which is, e.g., hot pressed to produce a semiconductor product.
|
申请公布号 |
US7445681(B2) |
申请公布日期 |
2008.11.04 |
申请号 |
US20030469245 |
申请日期 |
2003.09.08 |
申请人 |
JAPAN SCIENCE AND TECHNOLOGY AGENCY |
发明人 |
AKIMITSU JUN;ZENITANI YUJI;MURANAKA TAKAHIRO;KADOMURA KAZUNOBU |
分类号 |
C22C1/05;C22C23/00;C01B35/04;C04B35/645;C22C1/04;C22C25/00;C22C28/00;C22C30/00;C30B29/02;C30B29/52;H01B13/00;H01L39/12 |
主分类号 |
C22C1/05 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|