Ceramic superconducting composition and process and apparatus fo

Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

505734, 505781, 505778, 505785, 501123, 501126, 501152, 252521, 264 65, C04B 3550, A01B 1200

Patent

active

051550920

ABSTRACT:
In a ceramic superconducting composition, Ag20 is added thereto in an amount of 0.1 wt. % to 70 wt. % per mole of LaBa2Cu3O3-.delta.. The critical current density of the ceramic superconducting composition is affected by heat treatment conditions. The critical electric current density of the ceramic superconducting composition is increased when it is prepared through heat treatment while controlling the partial pressure of oxygen in a heat treatment atmosphere in steps with successive stages including a temperature-elevating step, a sintering step, a temperature-lowering step, and an annealing step.

REFERENCES:
patent: 4202690 (1980-05-01), Funke
patent: 4490108 (1984-12-01), Petzi
patent: 5049542 (1991-09-01), Brass et al.
Sungi et al., "Superconductivity and Magnetism is High-Tc Superconduction ReBa.sub.2 Cu.sub.3 O.sub.7-x with Rec 4, Dy, Gd, Sm, Nd, and La", Inter. Journ. Med. Phy. B, vol. 1, No. 2, 1987, 425-29.
Jin et al., "Large Magnetic Hysteresis in a multi-textured Y-Ba-Cu-O Superconductor", Appl. Phy. Lett. 54(6), 6 Feb. 1989, 584-86.
Singh et al., "Effect of Silver and Silver Oxide Additions on the Mechanical as Superconducting Properties of YBa.sub.2 Cu.sub.3 O.sub.7-.delta., Superconductors", J. Appl. Phys. 66(7) Oct. 1, 1989, pp. 3154-3159.
Maeda et al., Jap. Jour. Appl. Phy. 26 #8, Aug. 1987, L1368-L1370.
Wada et al., "High Temperature Superconductor La Ba.sub.2 Cu.sub.3 O.sub.7-.delta. with zero resistance at 92K", Appl. Phys. Lett. 52(23), pp. 1989-91 Jun. 1988.
Omori et al., "Preparation of Oriented Orthorhombic Ln Ba.sub.2 Cu.sub.3 O.sub.7-.delta. Polycuptals", Jap. J. Appl. Phys. vol. 26 #8, pp. L1421-L1423 Aug. 1987.
Chaddah et al., "Appl. Phys. Letts.", 52(18), pp. 1525-1527, 2 May 1988.
Wu et al., "High-Temperature Processing of Oxide Superconductors and Superconducting Oxide-Silver Composite", ACS Symp. Ser., 377 Chem. High-Temp. Supercond. 2, (1988) pp. 181-193.
C. U. Segre et al., "Oxygen Ordering and Superconductivity in La(Ba.sub.2-x)LA.sub.x)Cu.sub.3 O.sub.7+.delta. ", Nature vol. 329, pp. 227-229, Sep. 17, 1987.
Werkstoffe & Konstruktion, 02:3 268-270 (1988).
Japanese Journal of Applied Physics, 28:5 780-783 (1989).
Japanese Journal of Applied Physics, vol. 26, No. 8, Aug. 1987, pp. L1368-L1370, "High Temperature Superconductive at 90 K in Orthorhombic LaBa.sub.2 CU.sub.3 O.sub.y ", Maeda et al.
Physical Review B, vol. 36, No. 4, pp. 2417-2420, "Effect of structural changes on the zero-resistance transition temperature of La.sub.1 Ba.sub.2 Cu.sub.3 O.sub.9-.delta.", Lee et al.
Physical Review Letters, vol. 58, No. 18, pp. 1888-1890, May 4, 1987, "New Superconducting Cuprate Perovskites", Murphy et al.
Applied Physics, vol. 52, No. 23, Jun. 6, 1988, pp. 1989-1991, "High transition temperature superconductor LaBa.sub.2 Cu.sub.3 O.sub.7-y with zero resistance at 92 K", Wada et al.
Japanese Journal of Applied Physics, vol. 27, No. 6, Jun. 1988, pp. L1101-L1103, "Fracture Toughness Measurements of Ba.sub.2 YCu.sub.3 O.sub.7-x Superconducting Oxide by Means of Indentation Technique", Ochiai et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Ceramic superconducting composition and process and apparatus fo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ceramic superconducting composition and process and apparatus fo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ceramic superconducting composition and process and apparatus fo will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1300457

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.