| 发明名称 |
Supraleiter auf Thalliumbasis substituiert durch seltene Erden |
| 摘要 |
The present invention comprises novel superconducting materials exhibiting superconductivity at temperatures exceeding 90 K with chemical formula TlaPbbCacSrdReCufOg where R = Y or the lanthanide rare earth elements and where 0.3</=a,b</=0.7,0.05</=c</=1.1,2-c</=d</=1.95,0.05</=e</=1,1.9</=f</=2.1 and 6.5</=g</=7.5. These compounds, which are layered perovskite-like oxides, exhibit a high chemical stability, form readily into nearly single phase, do not require adjustment of oxygen stoichlometry after synthesis and compositions may be chosen allowing superconductivity at temperatures exceeding 100K. A preferred form of the superconducting materials is the range of compositions given by the chemical formula Tl0.5+xPb0.5-xCa1-ySr2-zRy+zCu2O7+/- delta where O</=x,8</=0.3, O</=y</=0.95, 0.05</=z</=1-y of which a preferred form is Tl0.5+xPb0.5-xCa0.8+x+zSr2-zR0.2-xCu2O7+/- delta exemplified by Tl0.5Pb0.5CaSr1.8La0-2Cu2O7+/- delta where O</= delta </=0.1. <IMAGE> |
| 申请公布号 |
DE69120840(D1) |
申请公布日期 |
1996.08.22 |
| 申请号 |
DE1991620840 |
申请日期 |
1991.02.20 |
| 申请人 |
HER MAJESTY THE QUEEN IN RIGHT OF NEW ZEALAND, LOWER HUTT, NZ |
发明人 |
TALLON, JEFFREY LEWIS, YORK BAY, EASTBOURNE, NZ;PRESLAND, MURRAY ROBERT, MAHINA BAY, EASTBOURNE, NZ |
| 分类号 |
C04B35/45;H01L39/12;(IPC1-7):H01L39/12 |
主分类号 |
C04B35/45 |
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