Compositions having the nominal formula
Bi.sub.a Sr.sub.b Ca.sub.c Cu.sub.3 O.sub.x
wherein a is from about 1 to 3,
b is from about 3/8 to 4,
c is from about 3/16 to 2,
x=(1.5 a+b+c+y) where
y is from about 2 to 5, with the proviso
that "b+c" is from about 3/2 to 5, containing a metal oxide phase of the
formula Bi.sub.2 Sr.sub.3-z Ca.sub.z Cu.sub.2 O.sub.8+w
wherein z is from about 0.1 to 0.9
w is greater than zero but less than 1, are superconducting. Processes for
manufacturing such compositions and for using them are disclosed.
Составы имея штатную формулу Bi.sub.a Sr.sub.b Ca.sub.c Cu.sub.3 O.sub.x при котором а от около 1 к 3, б от около 3/8 к 4, ч от около 3/16 к 2, x=(1.5 a+b+c+y) где ы от около 2 к 5, with the proviso that "b+c" от около 3/2 к 5, содержащ участок окиси металла формулы Bi.sub.2 Sr.sub.3-z Ca.sub.z Cu.sub.2 O.sub.8+w при котором з от около от 0.1 до 0.9 ш greater than нул но меньш чем 1, superconducting. Показаны процессы для изготовлять такие составы и для использования их.
