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US 6,855,670 B1Granted
Superconducting bismuth-strontium-calcium-copper oxide compositions and process for manufacture
AssigneeE. I. Du Pont de Nemours and Company
InventorsJagannatha Gopalakrishnan, Arthur William Sleight, Munirpallam Appadorai Subramanian
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Abstract
Compositions having the nominal formula BiaSrbCacCu3Ox wherein a is from about 1 to 3, b is from about ⅜ to 4, c is from about {fraction (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 {fraction (3/2)} to 5, containing a metal oxide phase of the formula Bi2Sr3−zCazCu2O8+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.
Claims3
A superconducting phase of the formula
- Bi2Sr3−zCazCu2O8+w
- wherein “z” is from about 0.4 to about 0.8, and
- w is a value greater than zero and less than 1.
Dependencies are inferred from the claim text.