Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – Superconductor next to layer containing nonsuperconducting...
Patent
1994-08-16
1996-02-06
King, Roy V.
Superconductor technology: apparatus, material, process
High temperature devices, systems, apparatus, com- ponents,...
Superconductor next to layer containing nonsuperconducting...
505470, 505501, 505737, 505742, 505120, 427 62, 427343, 428930, B32B 900, B05D 512
Patent
active
054895731
ABSTRACT:
A method is disclosed for forming polycrystalline thallium system superconductors having high current carrying capacity and high magnetic field behavior. A precursor deposit is formed comprised of silver, in an amount of about 1 to 20 mole percent of total metals in the precursor deposit, and the balance oxides of calcium, barium, and copper in ratios for forming the superconductor. The precursor deposit is annealed in an oxidizing atmosphere, and in the presence of a source of thallous oxide. The source of thallous oxide is heated to a first temperature selected to incorporate thallium into the deposit in an amount of about 6 to 22 mole percent of metals in the superconductor, and the precursor deposit is heated to a second temperature to form the superconductor.
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DeLuca John A.
Karas Pamela L.
General Electric Company
King Roy V.
Pittman William H.
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