Superconductor technology: apparatus – material – process – High temperature – per se – Bismuth containing
Patent
1993-08-16
1996-04-09
Lieberman, Paul
Superconductor technology: apparatus, material, process
High temperature , per se
Bismuth containing
505110, 505125, 505776, 505782, 505784, 252518, 252521, H01B 1200, H01L 3912
Patent
active
055061966
ABSTRACT:
A super conducting material is disclosed which exhibits super conducting properties at higher temperatures than known so far. The super conducting by the invented materials is exhibited at temperatures of over 110.degree. K. Various combinations of the components exhibits superconductivities even at temperatures of around 273.degree. K. or even around 300.degree. K. Contrary to known art superconducting materials, which require super cooled conditions and are suited only to sophisticated applications, and thereby have limited applications, the materials of this inventions do not always require super cooled conditions are suited for limitless applications and can work even at room temperature conditions. While a large range of choice of materials are suggested a few important combinations are made of oxides of Bismuth, Barium and Copper. Replacement of Barium by Thallium gives additional advantages. The above materials can be formed into compacts, wire products or applied as thin coatings on substrates made of refractory materials. In forming thin coatings on refractory substrates, use of buffer layer/s of Zirconia or silver oxide provided highly promising results. The invention also suggest suitable methods for the manufacture of different forms of the super-conducting material.
REFERENCES:
patent: 4994432 (1991-02-01), Hermann et al.
patent: 5126319 (1992-06-01), Sen
Frank et al., "Electronic Structure of Thallium Barium Calcium Copper Oxide High Tc Superconductors", Physica C. 162-164 (Pt. II) 1355-6, 1989.
Mackrodt, "Calculated Lattice Structure, Stability and Properties of the Bismuth Alkaline Earth Cuprate Series . . . ", Supercond. Sci. Tech., vol. 1(6), pp. 343-348, 1989.
Kopec M.
Lieberman Paul
Magnetic Power, Inc.
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