Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – With melting
Patent
1993-07-06
1995-01-03
Mai, Ngoclan T.
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
With melting
505742, 505785, H01L 3912
Patent
active
H00013994
ABSTRACT:
A new process for more easily making a superconducting matrix of YBa.sub.2 Cu.sub.3 O.sub.7-x with fine and homogeneously dispersed Y.sub.2 BaCuO.sub.5 inclusions smaller than one micron compacts powders of YBa.sub.2 Cu.sub.3 O.sub.7-x and Y.sub.2 BaCuO.sub.5 into samples which are first sintered for improved mechanical stability and then placed into contact with each other. The samples are placed into a furnace above the peritectic temperature of the YBa.sub.2 Cu.sub.3 O.sub.7-x and held at that temperature for less than about fifteen minutes so that the YBa.sub.2 Cu.sub.3 O.sub.7-x begins to melt and be absorbed by capillary action into the Y.sub.2 BaCuO.sub.5 sample. The combined sample is cooled to a temperature below the peritectic temperature by a variety of alternative cooling cycles where it is transformed by a reaction into a superconducting matrix of YBa.sub.2 Cu.sub.3 O.sub.7-x with fine and homogeneously dispersed Y.sub.2 BaCuO.sub.5. BaCuO.sub.2 +CuO may be substituted for the YBa.sub.2 Cu.sub.3 O.sub.7-x and Y.sub.2 O.sub. 3 substituted for the Y.sub.2 BaCuO.sub.5 as starting components.
REFERENCES:
patent: 4929595 (1990-05-01), Wu
patent: 4956338 (1990-09-01), Rapp
patent: 4994437 (1991-02-01), Torii et al.
patent: 5084436 (1992-01-01), Morimoto et al.
patent: 5116810 (1992-05-01), Joshi et al.
patent: 5116812 (1992-05-01), Lelental et al.
patent: 5157017 (1992-10-01), Jin et al.
patent: 5200389 (1993-04-01), Tachikawa
patent: 5231076 (1993-07-01), Jeong
patent: 5240903 (1993-08-01), Shimoyama
patent: 5248660 (1993-09-01), Lee
McGinn "Microstructure and Critical Current Density of Zone Melt Tectured YBa.sub.2 Cu.sub.3 O.sub.6+x /Y.sub.2 BaCuO.sub.5 with BaSuO.sub.3 Additions" Appl. Phys. Lett. v. 59(1) 1 Jul. 1991, pp. 120-123.
I. K. Jeong et al, "Infiltration-Reaction Process for Fabricating YBa2Cu3O7-.delta. Superconductor", Physica C, vols. 185-189 (1991) Part IV, pp. 2393-2394, Dec. 1991.
K. W. Lee et al. "Magnetization and Flux Creep in YBa2Cu3Ox Superconductor Prepared by Infiltration-Reaction Process", Physica C. vol. 185-189 (1991) Part IV, pp. 2263-2264, Dec. 1991.
D. Willen et al, "A Method to Control Grain-Boundary Properties in Melt-Textured YBa2Cu3O7-x Superconductors", Texas Center for Superconductivity and Dept of Mechanical Engineering, University of Houston, 1992 Preprint, (assumed published in 1993).
Z. Lian et al, "The Properties of YBCO Superconductors Prepared by a New Approach: The `Powder Melting Process`"., IOP Publishing Limited, 1990. (Publication Name Unknown).
Endres William E.
Kozlowski Gregory
Kundert Thomas L.
Mai Ngoclan T.
Sinder Fredric L.
The United States of America as represented by the Secretary of
LandOfFree
Process for transforming pure Y.sub.2 BaCuO.sub.5 into a superco does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for transforming pure Y.sub.2 BaCuO.sub.5 into a superco, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for transforming pure Y.sub.2 BaCuO.sub.5 into a superco will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2201457