Bi系超電導体、超電導線材および超電導機器

Bi based superconductive object, superconductive wire rod, and superconductive apparatus

Abstract

PROBLEM TO BE SOLVED: To provide a Bi based superconductive object in which superconducting transition is steep and which has a critical temperature higher than 110 K, and to provide a superconductivity wire rod and a superconductive apparatus containing the Bi based superconductive object. SOLUTION: This Bi based superconductive object comprises (Bi, Pb)2223 as a superconductivity phase, wherein a first critical temperature T 1C is higher than 110.0 K in which a magnetic susceptibility which is measured in a status that a magnetic field is impressed in a direction parallel to a c-axis of the (Bi, Pb)2223, and is standardized by 50 K becomes -0.5, and |T 2C -T 1C | which is the difference between a second critical temperature T 2C in which a magnetic susceptibility becomes -0.1 and the first critical temperature T 1C is 1.0 K or less. Further preferably, |T 3C -T 1C | which is the difference between a third critical temperature T 3C in which a magnetic susceptibility becomes -0.001 and the first critical temperature T 1C is 3.0 K or less. COPYRIGHT: (C)2008,JPO&INPIT
【課題】超電導転移が急峻で臨界温度が110Kよりも高いBi系超電導体、このBi系超電導体を含む超電導線材および超電導機器を提供する。 【解決手段】本Bi系超電導体は、超電導相として(Bi,Pb)2223を含むBi系超電導体であって、(Bi,Pb)2223のc軸に平行な方向に磁場が印加されている状態で測定され50Kで規格化された磁化率が−0.5となる第1の臨界温度T 1C が110.0Kより高く、磁化率が−0.1となる第2の臨界温度T 2C と前記第1の臨界温度T 1C との差|T 2C −T 1C |が1.0K以下である。さらに好ましくは、磁化率が−0.001となる第3の臨界温度T 3C と前記第1の臨界温度T 1C との差|T 3C −T 1C |が3.0K以下である。 【選択図】図1

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (6)

    Publication numberPublication dateAssigneeTitle
    JP-2002037626-AFebruary 06, 2002Internatl Superconductivity Technology Center, 財団法人国際超電導産業技術研究センタービスマス系高温超電導体の製造方法。
    JP-2003532614-ANovember 05, 2003チョイ,ジン,ホ超伝導体コロイド、これから製造した超伝導体薄膜及びこれらの製造方法
    JP-2004241301-AAugust 26, 2004Sumitomo Electric Ind Ltd, 住友電気工業株式会社酸化物超電導線材の製造方法および酸化物超電導線材の原料粉末
    JP-H02120227-AMay 08, 1990Fujikura LtdProduction of bi-based oxide superconductor
    JP-H04300208-AOctober 23, 1992Hughes Aircraft CoPassivation for thin film oxide superconductor
    JP-H06183822-AJuly 05, 1994Kokusai Chodendo Sangyo Gijutsu Kenkyu Center, Nissan Motor Co Ltd, 日産自動車株式会社, 財団法人国際超電導産業技術研究センターBi系超電導体の急速合成法

NO-Patent Citations (0)

    Title

Cited By (0)

    Publication numberPublication dateAssigneeTitle