Process for preparing a perovskite Bi-containing superconductor

Details Process for preparing a perovskite Bi-containing superconductor Process for preparing a perovskite Bi-containing superconductor

1995-01-25

1996-12-17

King, Roy V.

Superconductor technology: apparatus, material, process

Processes of producing or treating high temperature...

Coating

505474, 505475, 505501, 505731, 505732, 505742, 427 62, B05D 512

Patent

active

055853323

ABSTRACT:
A perovskite type superconductor film having a high content, almost a single phase, of the high Tc phase is formed by the steps of: depositing at least one first film of a first material (e.g., a composite oxide of Bi-Sr-Ca-Cu-O system or Tl-Ba-Ca-Cu-O system) constituting a perovskite type superconductor over a substrate; depositing at least one second film of a second material containing an oxide or element (Bi.sub.2 O.sub.3, Tl.sub.2 O.sub.3, PbO.sub.x, etc., particularly PbO.sub.x) having a vapor pressure of more than 10.sup.-4 Pa at 800.degree. C. at least as a main component over the substrate; to thereby form a stack of the first and second films; and heat treating the stack of the first and second films to form the perovskite type superconductor film on the substrate. Further, preferred compositions of the as-deposited films or stack are determined.

REFERENCES:
Chemical & Engineering News, vol. 66, No. 20, 16 May 1988, pp. 24-29, Washington, DC, US; R. Dagani: "New class of superconductors pushing temperatures highe."
Applied Physics Letters, vol. 53, No. 18, 31 Oct. 1988, pp. 1759-1761, American Institute of Physics, New York, NY, US; R. Ramesh et al.: "Microstructure of Pb-modified Bi-Ca-Sr-Cu-O superconductor."
Nature, vol. 332, 10 Mar. 1988, p. 138; Z. Z. Sheng et al.: "Bulk superconductivity at 120 K in the Ti-Ca/Ba-Cu-O system."
MRS Int'l. Mtg. on Adv. Mats., vol. 6, 1989, pp. 845-850, Materials Research Society, A. Tanaka et al.: "Superconducting thin films on sintered alumina substrates."
Solid State Communications, vol. 70, No. 8, 1989, p. 829, S. K. Dew et al.: "Optimization of Pb-Bi-Sr-Ca-Cu-O thin films for zero resistance above look."
Appl. Phys. Lett. 54 (14), 3 Apr. 1989, pp. 1362-1364; A. Tanaka et al.: "Pb-doped Bi-Sr-Ca-Cu-O thin films."
Appl. Phys. Lett. 54 (19), 8 May 1989, pp. 1929-1931; S. K. Dew et al.: "Effects and loss of lead in doped Bi-Sr-Ca-Cu-O films."
Appl. Phys. Lett. 55 (12), 18 Sep. 1989, pp. 1252-1254; A. Tanaka et al.: "Composition dependence of high Tc phase formation in Pb-doped Bi-Sr-Ca-Cu-O thin films."
Paserin et al, "Vacuum deposition of multilayer B.sub.i --C.sub.a --S.sub.r --C.sub.u --O superconducting thin films", Appl. Phys. lett. 53(7) Aug. 1988 pp. 624-625.
Takano et al, "High-Tc phase promoted and stabilized in the B.sub.i, P.sub.b --S.sub.r --C.sub.a --C.sub.u --O system", Jpn. J. Appl. Phys. 27(6) Jun. 1988 pp. 1041-1043.
Yotsuya et al, "Fabrication of Bi(Pb)SrCaCuO Thin film of high-Tc phase", Jpn. J. Appl. Phys. 28(6) Jun. 1989 pp. L972-974.
Hazen et al, "Superconductivity in the high-Tc B.sub.i --C.sub.a --S.sub.i --C.sub.u --O system: Phase Identification", Phys. rev. lett. 60(12) Mar. 1988 pp. 1174-1177.

Affiliated with

Also associated with

Rating

Process for preparing a perovskite Bi-containing superconductor 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 preparing a perovskite Bi-containing superconductor , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing a perovskite Bi-containing superconductor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1991199