Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1987-09-28
1990-07-17
Silbaugh, Jan H.
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
264 24, 264 28, 264 63, 264108, 505741, C04B 3328, B28B 126
Patent
active
049421514
ABSTRACT:
A superconductor comprised of a polycrystalline metal oxide such as YBa.sub.2 Cu.sub.3 O.sub.7-X (where 0<X<0.5) exhibits superconducting properties and is capable of conducting very large current densities. By aligning the two-dimensional Cu-O layers which carry the current in the superconducting state in the a- and b-directions, i.e., within the basal plane, a high degree of crystalline axes alignment is provided between adjacent grains permitting the conduction of high current densities. The highly anisotropic diamagnetic susceptibility of the polycrystalline metal oxide material permits the use of an applied magnetic field to orient the individual crystals when in the superconducting state to substantially increase current transport between adjacent grains. In another embodiment, the anisotropic paramagnetic susceptibility of rare-earth ions substituted into the oxide material is made use of as an applied magnetic field orients the particles in a preferential direction. This latter operation can be performed with the material in the normal (non-superconducting) state.
REFERENCES:
patent: 1918848 (1933-07-01), Land et al.
patent: 3073732 (1963-01-01), Hundsdiecker
Poeppel et al., "Fabrication of YBa.sub.2 Cu.sub.3 O.sub.7 Superconducting Ceramics", ACS Symposium Series 351, pp. 261-265, Aug. 30-Sep. 4, 1987.
Hor et al., "Superconductivity above 90K . . . ", Physical Review Letters, vol. 58, No. 18, May 4, 1987, pp. 1891-1894.
Johnson et al., "Fabrication of Ceramic Articles from High Tc Superconducting Oxides", High Temperature Superconductors, MRS 1987, Spring Meeting, Apr. 1987, pp. 193-195.
Farrell et al., "Superconducting Properties of Aligned Crystalline Grains of Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-8 ", Phy. Rev. B, vol. 36, No. 7, Sep. 1, 1987, pp. 4025-4027.
Capone Donald W.
Dunlap Bobby D.
Veal Boyd W.
ARCH Development Corporation
Fertig MaryLynn
Silbaugh Jan H.
LandOfFree
Magnetic preferential orientation of metal oxide superconducting does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic preferential orientation of metal oxide superconducting, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic preferential orientation of metal oxide superconducting will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-95074