Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1990-11-19
1993-06-22
Beck, Shrive
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
505733, 505742, 427 62, 4274432, B05D 512
Patent
active
052216616
ABSTRACT:
A method is provided for depositing a dense, high quality, superconducting coating on a substrate of large size and complex shape. The superconducting coating is deposited from a precursor melt that generally comprises the same constituents as the superconducting coating but not necessarily in the same proportions. The liquid precursor melt, which may bear suspended platelike crystals of the superconducting phase, flows into or through a smooth, fine-grained, porous substrate that is largely inert to the liquid precursor. The desired superconducting phase is the sole crystalline phase co-existing with the precursor melt over a range of conditions. The crystals have a pronounced platelike character and form on the substrate with their superconducting planes oriented parallel to the surfaces of the substrate. The precursor may be applied by dipping the substrate into the precursor melt at a temperature just above the liquidus, or by painting on a suspension, slurry, or paste of precursor material and heating the substrate to melt the precursor. The platelike crystals of the superconducting phase of the precursor melt form on the substrate and residual liquid flows into and through the pores of the substrate to produce a very adherent continuous film coating after cooling and annealing.
REFERENCES:
Akamatsu et al., "Instantaneous Preparation of Superconducting Thick Films Through Melts in the Bi-Ca-Sr-Cu-O system", Jpn. J. Appl. Phys. 27(9) Sep. 1988 L1696-1698.
Yoshimura et al., "Preparation of Bi.sub.2 Sr.sub.2 CaCu.sub.2 O.sub.x superconductors from Amphous films by rapid quenching after rapid melting", Jpn. J. Appl. Phys. 27(10) Oct. 1988 L1877-1879.
Kawaguchi et al., "X-ray diffraction study of a high-Tc Bi-Ca-Sr-Cu-O Superconductor having incommensurate Superstructure", Jpn. J. Appl. Phys. 27(6) Jun. 1988 L1015-7.
Moon et al., "High-density Bi-Pb-Sr-Ca-Cu-O superconductor prepared by rapid thermal melt processing", Appl. Phys. lett. 55(14) Oct. 1989 pp. 1466-1468.
Chen et al., "Microstructure of epitaxial YbBa.sub.2 Cu.sub.3 O.sub.7 superconducting films grown by a new liquid gas-solidification technique" Appl. Phys. Lett. 53(23) Dec. 1988 pp. 2339-2341.
Gao et al. "Synthesis of Bi-Pb-Sr-Ca-Cu oxide/Ag superconductors by melt dipping and oxidation of metallic precursor alloys" Appl. Phys. Lett. 55(21) Nov. 1989 pp. 2227-2229.
Shimomura et al., "Preparation of Superconductive (Bi,Pb)-Sr-Ca-Cu-O Thick films by rapid quenching" Jpn. J. Appl. Phys. vol. 28(4) Apr. 1989 L612-614.
Prieto et al., "Formation of highly textured Bi-Sr-Ca-Cu-O superconducting thick films by a rapid melting process" Solid State Communications, vol. 69, No. 3, 1989 pp. 235-240.
Komatsu et al., "Preparation of high-Tc Superconducting Bi-Ca-Sr-Cu-O ceramics by the melt quenching method", Jpn. J. Appl. Phys. 27(4) Apr. 1988 L533-535.
Ming Xu, et al., "Highly Textured Thick Films by a Melt-Annealing Technique in the Bi-Sr-Ca-Cu-O System," Appl. Phys. Lett., vol. 55, No. 21, Nov. 20, 1989.
L. Toth, et al., "Superconducting Properties of Platelet-Aligned Thick Films of BSCCO," Abstract 4A-11, Int'l Conf. Materials and Mechanisms of Superconductivity, Jul. 1989.
Beck Shrive
King Roy V.
McFarren John C.
Rockwell International Corporation
LandOfFree
Method of depositing a superconducting Bi.sub.2 Sr.sub.2 CaCu.su does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of depositing a superconducting Bi.sub.2 Sr.sub.2 CaCu.su, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of depositing a superconducting Bi.sub.2 Sr.sub.2 CaCu.su will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1441058