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US 6,191,075 B1Granted
Method of manufacturing a high temperature superconductor with improved transport properties
AssigneeThe University of Chicago
InventorsUthamalingam Balachandran, Richard W. Siegel, Thomas R. Askew
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Abstract
A method of preparing a high temperature superconductor. A method of preparing a superconductor includes providing a powdered high temperature superconductor and a nanophase paramagnetic material. These components are combined to form a solid compacted mass with the paramagnetic material disposed on the grain boundaries of the polycrystaline high temperature superconductor.
Claims7
A method of preparing a high temperature superconducting material, comprising the steps of:
- (a) providing a powdered high temperature superconductor having particles of micron size range;
- (b) providing ultra-fine grained superparamagnetic particles having diameters of from about 10 to 500 Angstroms, and having a localized magnetic susceptibility behavior arising from their size being in the range of about 10 to 500 Angstroms in diameter;
- and
- (c) combining said ultra-fine grained superparamagnetic particles with said powdered high temperature superconductor to form a solid mass comprised of crystalline grains of said superparamagnetic particles and said powdered high temperature superconductor, said superparamagnetic particles constituting about 0.1-0.3% by weight of the total, and having grain boundaries between said grains of said powdered high temperature superconductor and a dispersion of said superparamagnetic particles on the grain boundaries, thereby enhancing intergrain critical current density of said high temperature superconducting material.
1 more element
A method of preparing a high temperature 123 YBaCu oxide superconductor, comprising the steps of:
- (a) providing powdered 123 YBaCu oxide superconductor of micron size range;
- (b) providing a nanophase size powder of superparamagnetic material;
- (c) combining said powdered 123 YBaCu oxide superconductor and said powder of superparamagnetic material with said superparamagnetic material about 0.1-0.3% by weight of the total;
- and
- (d) thermally treating said combined mixture of 123 YBaCu oxide superconductor and superparamagnetic material to form a solid mass having said superparamagnetic material disposed on grain boundaries of said 123 YBaCu oxide superconductor, the nanophase size of the superparamagnetic powder causing concentration of applied magnetic field lines near the superparamagnetic particles and thereby reducing magnetic field strength away from the superparamagnetic particles.
2 more elements
Dependencies are inferred from the claim text.