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Intermetallic compound superconducting material comprising magnesium and beryllium and alloy superconducting material containing the intermetallic compound

外国特許コード F110005111
整理番号 A061-22US
掲載日 2011年8月23日
出願国 アメリカ合衆国
出願番号 46924502
公報番号 20040094233
公報番号 7445681
出願日 平成14年3月8日(2002.3.8)
公報発行日 平成16年5月20日(2004.5.20)
公報発行日 平成20年11月4日(2008.11.4)
国際出願番号 JP2002002205
国際公開番号 WO2002072903
国際出願日 平成14年3月8日(2002.3.8)
国際公開日 平成14年9月19日(2002.9.19)
優先権データ
  • 特願2001-067663 (2001.3.9) JP
  • 2002WO-JP02205 (2002.3.8) WO
発明の名称 (英語) Intermetallic compound superconducting material comprising magnesium and beryllium and alloy superconducting material containing the intermetallic compound
発明の概要(英語) (US7445681)
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: Mg1Be2, has a hexagonal AlB2 type crystallographic structure and has a superconducting transition temperature (Tc) of 35 K.
An alloy containing this intermetallic compound excels in malleability and ductility and constitutes the alloy superconductor having a superconducting transition temperature (Tc) 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.
特許請求の範囲(英語) [claim1]
1. An alloy superconductor consisting of Mg1BexBy where 0<x<20 and 0<y<20.
[claim2]
2. An alloy superconductor as set forth in claim 1, characterized in that it has a superconducting transition temperature (Tc) of 35 K.
[claim3]
3. An alloy superconductor as set forth in claim 1, characterized in that it has a specific resistance not greater than 6 * 10-5 ohm-cm at a temperature ranging from its superconducting transition temperature (Tc) of 35 K to a room temperature.
  • 発明者/出願人(英語)
  • AKIMITSU JUN
  • ZENITANI YUJI
  • MURANAKA TAKAHIRO
  • KADOMURA KAZUNOBU
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 148/420
  • 148/442
  • 257/E39.009
  • 420/402
  • 420/580
  • 420/901
  • 505/100
  • 505/785
  • 505/805
参考情報 (研究プロジェクト等) CREST Phenomena of Extreme Conditions AREA
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