Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Heating – annealing – or sintering
Patent
1992-12-09
1995-01-31
Lieberman, Paul
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
Heating, annealing, or sintering
505729, 505782, 505783, 505783, 252518, 252521, H01B 1200, H01L 3912
Patent
active
053858824
ABSTRACT:
There is disclosed a process for preparing a thallium-containing superconductive composition. In the first step of the process, a mixture of an inorganic salt (such as potassium chloride) and a powder compositon is provided; the powder composition contains at least three separate compounds which, in combination, correspond to the stoichiometry of the super-conductor to be produced. This mixture is then charged to a closed container, raised to a temperature of from 800-959 degrees Centigrade, and heated for from about 1 to about 12 hours; thereafter, it is cooled to a temperature of 600 degrees Centigrade at a rate of at least 300 degrees Celsius per hour.
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patent: 5039653 (1991-08-01), Jackon
patent: 5043319 (1991-08-01), Arendt
patent: 5096879 (1992-03-01), Arendt
Inoue "Superconductive transition of 120K in a Tl-Bi-Sr-Ca-Cu-O", Jap Jnl Appl Phys. vol. 28(7) Jul. 1987 pp. L1167-L1170.
Katsui "Crystal growht of superconducting Bi-Sr-Ca-Co-O . . . " Jap Jnl Appl Phys. vol. 27(5) May 1988 pp. L844-L845.
Bayya Shyam S.
Gopalakrishman Sudhakar
Schulze Walter A.
Synder Robert L.
Alfred Univeristy
Greenwald Howard J.
Kopec M.
Lieberman Paul
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