Production of superconductor materials using a helicoidal flow o

Details Production of superconductor materials using a helicoidal flow o Production of superconductor materials using a helicoidal flow o

1990-06-12

1992-06-02

Lusignan, Michael

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505778, 505780, 505781, 264 8, 264 12, 501152, H01L 3912, B29B 900

Patent

active

051186594

ABSTRACT:
Finely divided, homogeneous and easily sintered superconducting powders of at least one rare earth element, e.g., yttrium and/or lanthanum, at least one alkaline earth metal, e.g., barium, calcium and/or strontium, and at least one transition metal, e.g., copper, nickel, manganese, cobalt and/or iron, and oxygen, are produced by (a) solubilizing, in water, the nitrates and/or acetates of at least one rare earth element, at least one alkaline earth metal, and at least one transition metal; (b) atomizing such solution to dryness; (c) calcining the dried product; and, optionally; (d) grinding the calcined material.

REFERENCES:
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patent: 4863521 (1989-09-01), Block
patent: 4898851 (1990-03-01), Michel
patent: 4956340 (1990-09-01), Kimura et al.
Wakata et al., Proceedings of the 18th Int. Conf. on Low14 Temp Physics, pp. 1059-1060 (1987).
Perry et al., Chemical Engineer's Handbook, (McGraw-Hill, N.Y.) 1963, pp. 20-57-20-61.
Increased Transition Temperatures in YBa.sub.2 Cu.sub.3 O.sub.y Superconducting Ceramics by Exposure to Nitrogen, D. N. Matthews et al., Nature, vol. 328, Aug. 1987.
Advanced Ceramic Materials-Ceramic Superconductors, G. W. Crabtree et al., vol. 2, No. 3B, Jul. 1987.

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