公开(公告)号：US20140024533A1

公开(公告)日：2014-01-23

申请号：US13748027

申请日：2013-01-23

Applicant: The University of Tokyo ,  Hitachi, Ltd.

Inventor： Motomune KODAMA ,  Kazuhide TANAKA ,  Junichi SHIMOYAMA ,  Akiyasu YAMAMOTO

IPC: H01L39/12 ,  H01L39/24

CPC classification number: H01L39/125 ,  C01B35/04 ,  H01L39/141 ,  H01L39/2487 ,  Y10T428/12181

Abstract: An MgB2 superconducting wire excellent in critical current density property is supplied by using a crystalline boron powder which is low in costs and easy to obtain. For the wire, a precursor of the MgB2 superconducting wire is used, the precursor having a linear structure including a core region containing a magnesium powder and a boron powder, and a sheath region formed of a metal covering an outer circumferential portion of the core region. The boron powder is crystalline, and has a volume-mean particle size of 2 μm or less.

Abstract translation: 通过使用低成本且易于获得的结晶性硼粉末来提供临界电流密度特性优异的MgB 2超导线材。 对于导线，使用MgB 2超导线的前体，该前体具有包括含有镁粉末和硼粉末的核心区域的线性结构，以及由覆盖芯部区域的外周部分的金属形成的护套区域 。 硼粉是结晶的，体积平均粒径为2μm以下。