Process for the preparation of superconductor precursor metal ox

Details Process for the preparation of superconductor precursor metal ox Process for the preparation of superconductor precursor metal ox

1989-06-01

1993-01-05

Lieberman, Paul

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505725, 505733, 505737, 505780, 501 94, 501123, 501126, 252518, 423593, H01L 3912

Patent

active

051770555

ABSTRACT:
Disclosed is a process for the preparation of multi-element metal oxide, high temperature superconductor precursor powder comprising spraying a homogenous solution of a multi-element metal salt solution mixed in a stoichiometric ratio corresponding to the desired superconducting composition into a horizontal tube-like furnace being heated to a temperature of 800.degree.-1000.degree. C., transporting resulting sprayed mist along the main axis of the furnace tube by the aid of hot air and collecting resultant finely divided metal oxide powder by the aid of a filter, whereby the resultant mixed metal oxide powder is a precursor for the preparation of a high temperature superconducting ceramic.

REFERENCES:
patent: 4657879 (1987-04-01), Nicholson et al.
patent: 4898851 (1990-02-01), Michel
patent: 4908346 (1990-03-01), Strom et al.
patent: 4985400 (1991-01-01), Chaudhury
Roy et al., "Preparation of Fine Oxide Powders by Evaporative Decomposition of Solutions", Ceramic Bulletin, vol. 56, No. 11 (1977).
Perry et al., Perry's Chemical Engineers Handbook, 6th edition, pp. 20-51 to 20-57, (1984).
Kawai et al., "Formation of Y-Ba-Cu-O Superconducting Film by a Spray Pyrolysis Method", J.J.A.P., vol. 26, No. 10, Oct., 1987, pp. L1740-L1742.

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