Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Treating with high pressure oxygen
Patent
1995-03-03
1997-10-14
Lieberman, Paul
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
Treating with high pressure oxygen
505320, 505325, 505400, 505401, 505728, 505285, 252521, C04B 35638, C04B 3576
Patent
active
056772653
ABSTRACT:
A process for the oxygenation of ceramic high T.sub.c superconductors is disclosed. The superconductor is formed from a sintered powdered ceramic. Microchannels are formed in the ceramic material by embedding in the powder a plurality of wires or fibers formed of a material which is thermally removable during the sintering process to leave thin, continuous, tubular channels. After sintering, the ceramic is exposed to oxygen in a high temperature, high pressure environment. The microchannels aid in the transport of oxygen into the interior of the material by providing passages along which the oxygen travels prior to diffusing into the material. The lengths of the diffusion paths in the material are thereby greatly shortened. In another embodiment, the channels are formed after sintering and prior to oxygenation by drilling, punching, or etching.
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Giessen Bill C.
Gilbert Thomas R.
Maheswaran Bala
Markiewicz Robert S.
Kopec Mark
Lieberman Paul
Northeastern University
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