Preparation of thin film superconducting oxides

Details Preparation of thin film superconducting oxides Preparation of thin film superconducting oxides

1987-11-23

1990-01-30

Morgenstern, Norman

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

427 62, 427 63, B05D 512, C01B 1504, C01F 1700, C04B 3505

Patent

active

048973785

ABSTRACT:
Cations such as La, Sr, Cu, or Y, Ba, Cu are dissolved in an organic solvent such as ethylene glycol and citric acid. The solution is formed into either a free-standing or supported film which is dried to produce a solid organic polymer. The polymer is then fired in an oxidizing atmosphere (pyrolysis) to obtain the superconducting oxide. It is preferred that the film be spin coated on a substrate to produce uniform coatings of thicknesses less than one micrometer. The resulting superconducting oxide film is fully dense, of controlled microstructure, very homogeneous in composition and suitable for demanding electronic device purposes or as coatings to form superconducting wires or other current carrying components.

REFERENCES:
patent: 3330697 (1967-07-01), Pechini
patent: 3898183 (1975-08-01), Sugier et al.
patent: 4022584 (1977-05-01), Rudy
patent: 4050147 (1977-09-01), Winter et al.
Wang et al., Inorganic Chemistry, 26, 1474, pp. 1474-1476, May, 1987.
Blank et al., Physica 145 B (1987) 222-226.
McCallum et al., Adv. Ceram. Mat'ls., vol. 2, No. 3B, Jul. 1987, pp. 388-400.
Moyseev et al., Fiz. Nizk. Temp., 13 (6), Jun. 87, pp. 648-651.

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