Thallium-calcium-barium-copper-oxide superconductor with silver

Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – Superconductor next to layer containing nonsuperconducting...

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505470, 505501, 505737, 505742, 505120, 427 62, 427343, 428930, B32B 900, B05D 512

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054895731

ABSTRACT:
A method is disclosed for forming polycrystalline thallium system superconductors having high current carrying capacity and high magnetic field behavior. A precursor deposit is formed comprised of silver, in an amount of about 1 to 20 mole percent of total metals in the precursor deposit, and the balance oxides of calcium, barium, and copper in ratios for forming the superconductor. The precursor deposit is annealed in an oxidizing atmosphere, and in the presence of a source of thallous oxide. The source of thallous oxide is heated to a first temperature selected to incorporate thallium into the deposit in an amount of about 6 to 22 mole percent of metals in the superconductor, and the precursor deposit is heated to a second temperature to form the superconductor.

REFERENCES:
patent: 4870052 (1989-09-01), Engler et al.
patent: 4997811 (1991-03-01), Hermann et al.
patent: 5073536 (1991-12-01), Sheng et al.
T Kumagai, et al., Preparation of Superconducting Ba2YCu3O7-y/Ag Composite Films by the Dipping-Pyrolysis Process Using Metal Naphthenates at 750 degrees C, Japanese Journal of Alpplied Physics, vol. 30, No. 7B, Jul. 1991, (pp. 1268-1270).
J. P. Singh et al., Effect of Silver and Silver Oxice Additions on the Mechanical and Superconducting Properties of YBa2Cu3O7-8 Superconductors, J. Appl. Phys. 66(7), Oct. 1, 1989, American Institute of Physics (pp. 3154-3159).
J. Jung et al., Flux Motion, Proximity Effect, and Critical Current Density in YBa2Cu2O7-8/Silver Composites, Physical Review B, vol. 42, No. 10, The American Physical Society, Oct. 1, 1990 (pp. 6181-6195).
G. G. Peterson, et al., Improvement of Polycrystalline Y-Ba-Cu-O by the Addition of Silver, J. Mater. Res. 3(4) Jul./Aug. 1988, Materials Research Society, (pp. 605-609).
B. Dwir et al., Evidence of Enhancement of Critical Current by Integrain Ag in YBaCuO-Ag Ceramics, Appl. Phys. Lett. 55(4), Jul. 24, 1989, American Institute of Physics, (pp. 399-401).
K. Jyodoi, et al., Doping Effects of Metallic Elements on the Superconductivity in the Tl-Ba-Ca-Cu-O System, Japanese Journal of Applied Physics, vol. 30, No. 12A, Dec. 1991 (pp. 2021-2024).
P. N. Peterts et al., Observation of Enhanced Properties in Samples of Silver Oxide Doped YBa2Cu3Ox, Appl. Phys. Lett. 52 (24) Jun. 13, 1988, American Institute of Physics (pp. 2066-2067).
F. Deslandes et al., Research of the Effective Role of Silver Additions to Yba2Cu3O7, Solid State Communications, vol. 71, No. 5, 1989 (pp. 407-410).
Wei Gao and J. B. VanderSande, The Reactions of Bi(Pb-Sr-Ca-Cu-O-Ag Superconducting Microcomposites Placed in Contact with Silver, Gold, Palladium, Nickel, Copper and Platinum Substrates, Materials Science & Engrg. B10, 1990 (pp. 247-255).
Hiroyuki Nasu et al., The Influences of Ag Addition on Superconducting Properties and Tensile Strength for Bi-Sr-Ca-Cu-O Fibers Prepared by Pyrolysis of Organic Acid Salts, Japanese Journal of Applied Physics, vol. 29, No. 10, Oct. 1990 (pp. 1819-1822).
T. E. Os'kina et al. Preparation of Bi-Pb-Sr-Ca-Cu-O Superconducting Thick Films on Metal Substrates of Au, Ag and Ni, Supercond Sci Technol. 4, 1991 (pp. 301-305).
Chan Joong Kim et al., Effects of Ag/Ag2O Doping on the Superconductivity of the Bi1.84-Pb0.34-Sr1.91-Ca2.03-Cu3.06-Oy Oxide, Materials Letters, vol. 11, No. 3.4, May 1991 (pp. 79-84).
Hammond et al, Appl. Phys. lett. 57(8) Aug. 1990, pp. 825-827.
Kawai et al, Jpn. J. Appl. Phys. 26(10) Oct. 1987, pp. L1740-L1742.
Tang et al, Supercond. Sci. Technol. 5 (1992) pp. 538-541.
Qi et al, Physica C 176 (1991) pp. 38-42.
Politis et al, Modern Physics letters B. vol. 2, No. 9 (1988) pp. 1119-1123.
Richeson et al, Appl. Phys. lett. 54(21) May 1989, pp. 2154-2156.
Lin et al, Jpn. J. Appl. Phys. 28(1) Jan. 1989 pp. L85-L87.

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