Alkaline-doped mercury cuprate superconductors

Alkaline-doped mercury cuprate superconductors

Alkaline-doped superconductors of the formulaX M2Ca2Cu3O8+ alpha are provided where X is selected from the group consisting of TI, Pb, Mo, Hg and mixtures thereof, M is selected from the group consisting of Ba, Sr and mixtures thereof, and a ranges from zero to about 0.2, and being doped with a dopa...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: WU, JUDY Z, YOO, SEHWAN
Format: Patent
Sprache:eng
Schlagworte:
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
ELECTRICITY
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:Alkaline-doped superconductors of the formulaX M2Ca2Cu3O8+ alpha are provided where X is selected from the group consisting of TI, Pb, Mo, Hg and mixtures thereof, M is selected from the group consisting of Ba, Sr and mixtures thereof, and a ranges from zero to about 0.2, and being doped with a dopant selected from the group consisting of Na and Li up to a level of up to about 12% molar ratio, based upon the amount of the element X taken as 100%. The superconductors of the invention exhibit extremely high Tc onset and TcO values and have high Jc properties as well. The superconductors can be fabricated at relatively low annealing temperatures (750 DEG -820 DEG C.) making them suitable for use as thin films with a variety of conventional substrates.