Superconducting material

US5169830A · kind A · utility

Assignees

• International Superconductivity Technology Center · JP
• Mitsubishi Metal Corporation · JP
• KYOCERA Corporation · JP
• TOKYO ELECTRIC POWER COMPANY HOLDINGS, INCORPORATED · JP

Inventors

• Takahiro Wada · Katano, JP
• Shinichi Koriyama · Tokyo, JP
• Takeshi Sakurai
• Nobuo Suzuki · Fujisawa, JP
• Takayuki Miyatake · Matsudo, JP
• Hisao Yamauchi · Nagareyama, JP
• Naoki Koshizuka · Tokyo, JP
• Shoji Tanaka · Kobe, JP

Key dates

• Filing date: Aug 15, 1990
• Grant date: Dec 8, 1992
• Expiry date: Aug 15, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S505/778

Abstract

A superconductive material is disclosed which has the following composition: EQU (R.sub.1-x Ca.sub.x)(Ba.sub.1-y La.sub.y).sub.2 Cu.sub.4 O.sub.8 wherein R is at least one element selected from Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, x is a number in the range of 0-0.3 and y is a number in the range of 0.001-0.3 with the proviso that y is not greater than 0.2 when x is not 0.