| 摘要 |
<p>A superconducting composition comprising an oxide complex of the formula [L1-xMx]aAbOy wherein L is lanthanum, lutetium, yttrium or scandium; A is copper, bismuth, titanium, tungsten, zirconium, tantalum, niobium, or vanadium; M is baryum, strontium, calcium, magnesium or mercury; and ''a'' is 1 to 2; ''b'' is 1; ''x'' is a number in the range of 0.01 to 1.0; and ''y'' is about 2 to about 4. The oxide complexes of the invention are prepared by a solid-state reaction procedure which produce oxide complexes having enhanced superconducting transition temperatures compared to an oxide complex of like empirical composition prepared by a coprecipitation - high temperature decomposition procedure. With a solid-state reaction prepared oxide complex of the invention a transition temperature as high as 100° K has been observed even under atmospheric pressure.</p> |
