| 摘要 |
<p>Described is a superconducting composition comprising an oxide complex of the formula [L1-xMx]aAbOy wherien L is scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, or a combination thereof; "M" is barium, strontium, calcium, magnesium, mercury, or a combination thereof provided that when "L" is lanthanum "M" is not barium; "A" is copper, bismuth, titanium, tungsten, zirconium, tantalum, niobium, vanadium or a combination thereof "x" is from about 0.01 to about 1.0; "a" is 1 to 2; "b" is 1; 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 co-precipitation - high temperature decomposition procedure. With a solid-state reaction prepared oxide complex of the invention a transition temperature as high as 100 DEG K has been observed even under atmospheric pressure. There is also disclosed a method for conducting an electrical current using an oxide complex described above as conductor material.</p> |
