Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1990-11-01
1992-05-19
Ryan, Patrick J.
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
505701, 505702, 505703, 505704, 428 76, 428426, 428432, 4284735, 428688, 428930, B32B 900
Patent
active
051149109
ABSTRACT:
An oxide superconductor having a high critical temperature is provided with a passivation coating comprising a first layer of a Group II oxide, such as magnesium oxide, and a second layer of a polymer, such as polyimide. The Group II oxide is formed under conditions to be substantially amorphous. After depositing the Group II layer, the encapsulated superconductor is heated to an elevated temperature for a period of time in an oxidizing atmosphere. This restores the high critical temperature to its original value. The polymer is then coated on top of the Group II oxide and cured. The passivation coating is resistant to strong acids, strong bases, and water, is robust, hard, and resilient against scratching.
REFERENCES:
patent: 4942142 (1990-07-01), Itozaki et al.
Japanese Journal Applied Physics, vol. 27, No. 11, Nov. 1988, L2088-L2090 Stabilization of Ba.sub.2 YCu.sub.3 O.sub.7-s . . . , Sato et al.
Formation of Crystallized Buffer Layer for High to Superconducting Thin Film, Shinohara et al., Oct. 1988.
High Temperature Superconductors, Gubner et al., Apr. 1987.
"Reactivity and Passivation for Bi Adatoms on YBa.sub.2 Cu.sub.3 O.sub.6.9 and Bi.sub.2 Ca.sub.1+x Sr.sub.2-x Cu.sub.2 O.sub.8+y ", H. M. Meyer et al., Appl. Phys. Lett. 53(11), 12 Sep. 1988, pp. 1004-1006.
"SiO.sub.2 and Si.sub.3 N.sub.4 passivation layers on Y-Ba-Cu-O Thin Films", Q. X. Jia et al., J. Appl. Phys. 66(1), 1 Jul. 1989, pp. 452-454.
"Surface and Interface Properties of High-Temperature Superconductors", H. Meyer, III et al., Chemistry of High-Temperature Superconductors, pp. 280-290.
Josefowicz Jack Y.
Nieh Kai-Wei
Rensch David B.
Denson-Low W. K.
Hughes Aircraft Company
Leitereg E. E.
Ryan Patrick J.
LandOfFree
Passivation of thin film oxide superconductors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Passivation of thin film oxide superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Passivation of thin film oxide superconductors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2417504