Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1989-03-13
1992-05-19
Morgenstern, Norman
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
505709, 505740, 505741, 505742, 427 62, 4273762, B05D 512
Patent
active
051149141
ABSTRACT:
An improved method for producing high temperature superconductors comprising sintering ceramic superconductor material in a sealed confinement chamber made of non-reactive impervious material, thereby preventing loss of oxygen from the material during heating and eliminating the need for reoxygenation after sintering.
REFERENCES:
Sadakate et al, MRS Symposium on High Temp. Superconductors, Nov. 30-Dec. 4, 1987, pp. 293-296.
McCallum et al., Advanced Ceramic Materials, vol. 2, No. 3B, Special Issue, Jul. 1987, pp. 388-400.
M. K. Wu, J. R. Ashburn, C. J. Torng, P. H. Hor, R. L. Meng, L. Gao, A. J. Huang, Y. Q. Wang and C. W. Chu, "Superconductivity at 93K in a New Mixed-Phase Y-Ba-Cu-O Compound System at Ambient Pressure", Physical Review Letters, vol. 58, p. 908, Mar. 2, 1987.
S. Jin, R. C. Sherwood, T. H. Tiefel, R. B. Vandover, R. A. Fastnacht, and M. E. Davis, "Processing for High Critical Currents in YBa.sub.2 Cu.sub.3 O.sub.7-o ", High-Temperature Superconductors II, Extended Abstracts EA-14 (Materials Research Society) Pittsburgh, Pa., 1988, p. 153.
D. W. Murphy, D. W. Johnson, Jr., S. Jin, R. E. Howard, "Processing Techniques for the 93K Superconductor Ba.sub.2 YCu.sub.3 O.sub.7 " Science, vol. 241, p. 922, Aug. 19, 1988.
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S. Jin, T. H. Tiefel, R. C. Sherwood, M. E. Davis, R. B. Van Dover, G. W. Kammlott, R. A. Fastnacht, and H. D. Keith, "High Critical Currents in Y-Ba-Cu-O Superconductors", Appl. Phys. Letter, vol. 52, p. 2074, Jun. 13, 1988.
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C. X. Qui and I Shih, "Some Properties of Bulk Y-Ba-Cu-O Compounds Containing SiO.sub.2 ", J. Appl. Phys. 64(4), Aug. 15, 1988, p. 2234.
M. F. Yan, W. W. Rhodes, and P. K. Gallagher, "Dopant Effects on the Superconductivity of YBa.sub.2 Cu.sub.3 O.sub.7 -Ceramics", J. Appl. Phys. 63, 821, Feb. 1, 1988.
A. T. Fiory, S. Martin, L. F. Schneemeyer, R. M. Flemming, A. E. White and J. V. Waszczak, "Oxygen Intercalation Homogeneity and Electrical Transport in Superconductinve Ba.sub.2 YCu.sub.3 O.sub.7 -Crystals", Physical Review, V3, No. 10, p. 7129, Oct. 1, 1988.
G. S. Grader, H. M. O'Bryan and W. W. Rhodes, "Improved Press Forging of Ba.sub.2 YCu.sub.3 O.sub.x Superconductor", Appl. Phys. Lett 52, 1831, May 23, 1988.
Anderson Robert E.
Nicholls Colin I.
Sablik Martin J.
Bueker Margaret
Morgenstern Norman
Southwest Research Institute
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