Bi-Pb-Sr-Ca-Cu-O system superconductors

US5229035A · kind A · utility

Assignees

• TODA KOGYO CORP. · JP
• NEC CORPORATION · JP
• TOSOH CORPORATION · CN
• Osaka Cement Co., Ltd. · JP
• Kabushiki Kaisha Kobe Seiko Sho · JP
• Seisan Kaihatsu Kagaku Kenkyusho · JP

Inventors

• Toshio Takada · Kyoto, JP
• Mikio Takano · Tokyo, JP
• Yoshinari Miura · Kasai, JP
• Jun Takada · Tama, JP
• Kiichi Oda · Nagoya, JP
• Naoichi Yamamoto · Suita, JP

Key dates

• Filing date: May 28, 1991
• Grant date: Jul 20, 1993
• Expiry date: May 28, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S505/782

Abstract

A Bi-Pb-Sr-Ca-Cu-O system superconductor having a composition of EQU Bi.sub.n Pb.sub.m Sr.sub.x Ca.sub.y Cu.sub.2 O.sub..delta. wherein n is a number from 0.76 to 1.05, m is a number from 0.01 to 0.20, x is a number from 0.85 to 1.35 and y is a number larger than 1.00 and not larger than 1.35; or n is a number larger than 1.06 and not larger than 1.15, m is a number from 0.12 to 0.25, x is a number from 1.20 to 1.35 and y is a number from 1.20 to 1.30; or n is a number larger than 0.75 and not larger than 1.15, m is a number from 0.25 to 0.35, x is a number from 1.20 to 1.35 and y is a number from 1.20 to 1.35, when they are normalized with the Cu mole number of 2, which has t.sub.c of at least 110 K.