Patent ID: 7056866
Filing Date: 2006-06-06
Classification: C01G,C01P,C04B,H01L,Y10S

Abstract:
1. A composition which is superconductive at a temperature of 70°K and higher, comprising: a metal oxide the formula wherein; “L” is yttrium, lanthanum, neodymium, samarium, europium, gadolinium, dyprosium, holmium, erbium, thulium, ytterbium, lutetium, or mixtures thereof, “M” is barium, strontium, or mixtures thereof; “A” is copper, “x” is from about 0.65 to 0.80; “a” is 1; “b” is 1; and “y” is a value from about 2 to about 4 that provides the metal oxide with zero electrical resistance at a temperature of 70°K or above.