Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Heating – annealing – or sintering
Patent
1996-09-13
2000-11-28
King, Roy V.
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
Heating, annealing, or sintering
505480, 505482, 505742, H01L 3924, B05D 512
Patent
active
061535613
ABSTRACT:
The present invention includes a method of oxygenating an oxide superconductive material having an initial oxygen content, the method comprising the steps: (a) obtaining an oxide superconductive material, the material having an initial oxygen content; and (b) placing the oxide superconductive material in contact an oxygen-containing media having an oxygen chemical potential greater than that of pure diatomic oxygen at 1 atmosphere pressure and at 300.degree. C., and raising the temperature of the oxide superconductive material to a temperature above about 400.degree. C., and maintaining the oxide superconductive material at the temperature and under the chemical potential of oxygen for sufficient time so as to alter the oxygen content of the oxide superconductive material from the initial oxygen content.
REFERENCES:
patent: 5021396 (1991-06-01), Fujita et al.
patent: 5034373 (1991-07-01), Smith et al.
patent: 5086034 (1992-02-01), Balachandran et al.
patent: 5096882 (1992-03-01), Kato et al.
patent: 5203897 (1993-04-01), Powers et al.
patent: 5259885 (1993-11-01), Sandhage
patent: 5318725 (1994-06-01), Sandhage
patent: 5374611 (1994-12-01), Dabrowski et al.
patent: 5376623 (1994-12-01), Tsai et al.
patent: 5447291 (1995-09-01), Sandhage
patent: 5472527 (1995-12-01), Otto et al.
patent: 5509101 (1996-04-01), Gilliland et al.
patent: 5705457 (1998-01-01), Tamura et al.
Shimakawa et al,Jpn. J. Appl. Phys. 27(6) pp. L1071-1073, Jun. 1988.
Bormann, et al., Stability limits of the perovskite structure in the Y-Ba-Cu-O System, Appl. Phys. Lett. vol. 54, pp. 2148-2150, May 1989.
Lindemer, et al., Experimental and Thermodynamic Study of Nonstoichiometry in (YBa.sub.2 Cu.sub.3 O.sub.7-x), J. Am. Ceram. Soc., vol. 72, pp. 1775-1788, 1989.
Jorgensen, et al., Oxygen ordering and the orthorhombic-to-tetragonal phase transition in YBa.sub.2 Cu.sub.3 O.sub.7-x, Physical Review B, vol. 36, No. 7, pp. 3608-3616, Sep. 1987.
Farneth, et al., Influence of Oxygen Stoichiometry on the Structure and Superconducting Transition Temperature of Yba.sub.2 Cu.sub.3 O.sub.x, Solid State Communications, vol. 66, No. 9, pp. 953-959, 1988.
Sengupta, et al., Fabrication Of Large Domain YBa.sub.2 Cu.sub.3 O.sub.x For Magnetic Suspension Applications, Processings of the Third International Conference on Magnetic Suspension Technology, 15 pages, 1995.
Todt, et al., Processing of Single-and Multi-Domain YBa.sub.2 Cu.sub.3 O.sub.x Bulk Materials for Levitation Applications By Nd.sub.1 +.sub.x Ba.sub.2 -.sub.x Cu.sub.3 O.sub.y Seeding, Applied Superconductivity, vol. 3, No. 1-3, pp. 175-185, 1995.
Todt, et al., Processing of Large YBa.sub.2 Cu.sub.3 O.sub.x Domains for Levitation Applications by a Nd.sub.1+x Ba.sub.2-x Cu.sub.3 O.sub.y -Seeded Melt-Growth Technique, Journal of Electronic Materials, vol. 23, No. 11, pp. 1127-1130, 1994.
Kim, et al., New method of producing fine Y.sub.2 BaCuO.sub.5 in the melt-textured Y-Ba-Cu-O system: attrition milling of Yba.sub.2 Cu.sub.3 O.sub.y -Y.sub.2 BaCuO.sub.5 powder and CeO.sub.2 addition prior to melting, Superconductor Science and Technology, vol. 8, pp. 652-659, 1995.
Acero, et al., Current Limiter Based on Melt Processed YBCO Bulk Superconductors, IEEE Transactions on Applied Superconductivity, vol. 5, No. 2, pp. 1071-1074, Jun. 1995.
Meng, et al., Growth and possible size limitation of quality single-grain YBa.sub.2 Cu.sub.3 O.sub.7, Physica C, vol. 232, pp. 337-346, 1994.
Frangi, et al., Enhanced levitation properties in melt-textured YBCO samples grown without temperature gradient, Physica C, vol. 233, pp. 301-310, 1994.
Allemeh, et al., Effect of High-Temperature, High-Oxygen-Fugacity Annealing on the Stability of the (Bi,Pb).sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.10.+-..delta. -Type Compound, J. Am. Ceram. Soc., vol. 78, pp. 2513-2520, 1995.
Rothman, et al., Tracer diffusion of oxygen in YBa.sub.2 Cu.sub.3 O.sub.7-.delta., The American Physical Society, pp. 8852-8860, 1989.
Tu, et al., Diffusion of oxygen in superconducting YBa.sub.2 Cu.sub.3 O.sub.7-.delta. ceramic oxides, The American Physical Society, pp. 304-314, 1989.
Grader, et al., Rates of Change in High Temperature Electrical Resistivity and Oxygen Diffusion Coefficient in Ba.sub.2 YCu.sub.3 O.sub.x, Applied Physics A, vol. 45, pp. 179-183, 1988.
Lo, et al., Fabrication of large grain YBCO by seeded peritectic solidification, J. Mater. Res., vol. 11, No. 4, pp. 1-9, Apr. 1996.
Liang, et al., Oxygen Content and Phase Diagram of the High-T.sub.c Superconductor Ba.sub.2 ErCu.sub.3 O.sub.y, Japanese Journal of Applied Physics, vol. 27, No. 7, pp. L1277-L1280, Jul. 1988.
King Roy V.
The Ohio State University
LandOfFree
Method for oxygenating oxide superconductive materials 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 for oxygenating oxide superconductive materials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for oxygenating oxide superconductive materials will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1725742