Method of making high tc oxide superconductor particles by adjus

Details Method of making high tc oxide superconductor particles by adjus Method of making high tc oxide superconductor particles by adjus

1987-11-19

1990-10-09

Roy, Upendra

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

252518, 252527, 420901, 423263, 423593, 505735, C01F 1104, C01F 1700

Patent

active

049620827

ABSTRACT:
Techniques for the preparation of superconducting perovskites in the MBa.sub.2 Cu.sub.3 O.sub.7-y system wherein M represents yttrium of a rare earth element and y is an integer ranging from 0.1 to 0.8 are described. The techniques involve the use of either a sol-gel or controlled precipitation process in which a barium solution in acetic acid is reacted with copper acetate and either a rare earth hydroxide or rare earth nitrate to form a colloid which is subsequently heated and fired to yield the desired composition. In the embodiment in which the nitrate is employed, the resultant colloid is freeze dried. In both the sol-gel and controlled precipitation processes, heating and firing are required to yield the desired characteristics.

REFERENCES:
patent: 4049789 (1977-09-01), Manabe
patent: 4567031 (1986-01-01), Riley
patent: 4588575 (1986-05-01), David
patent: 4627966 (1986-12-01), Micheli
patent: 4636378 (1987-01-01), Pastor et al.
patent: 4643984 (1987-02-01), Abe et al.
patent: 4661282 (1987-04-01), Clark
patent: 4676928 (1987-06-01), Leach et al.
patent: 4764357 (1988-08-01), Sherif et al.
patent: 4804649 (1989-02-01), Sherif
patent: 4866031 (1989-09-01), Bolt et al.
D. L. Segal, Journal of Non-Crystalline Solids, vol. 63, p. 183 (1984).
S. Doeuff et al., Journal of Non-Crystalline Solids, vol. 89, p. 84, (1987).
Chu et al., J. Am. Ceram. Soc. 70 (Dec. 1987) C-375, Iqbal et al., Reprint Oct. 29, 1987, pp. 1-5.
Tarascon et al., in Chemistry of High-Temperature Superconductors, ed. Nelson et al., ACS-Symp. #351, Aug. 30-Sept. 4, 1987, p. 199.
Fujiki et al., Jap. Jour. Appl. Phys. 26 (Jul. 1987), p. L1159-1160.

Affiliated with

Also associated with

Rating

Method of making high tc oxide superconductor particles by adjus 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 making high tc oxide superconductor particles by adjus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making high tc oxide superconductor particles by adjus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-973467