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US 7,939,126 B2Granted
Precursor solutions and methods of using same
AssigneeAmerican Superconductor Corporation
InventorsMartin W. Rupich, Thomas A. Kodenkandath
Life of this patent
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Abstract
Superconductor precursor solutions are disclosed. The precursor solutions contain, for example, a salt of a rare earth metal, a salt of an alkaline earth metal and a salt of a transition metal. The precursor solutions can optionally include a Lewis base. The precursor solutions can be processed relatively quickly to provide a relatively thick and good quality intermediate of a rare earth metal-alkaline earth metal-transition metal oxide.
Claims12
A method of making a superconductor film, comprising:
- disposing a precursor solution onto a surface of a layer to form a precursor film, the precursor solution including:
- a carboxylate salt of a rare earth metal,
- a fluorinated carboxylate salt of an alkaline earth metal, and
- a non-halogenated carboxylate salt of copper;
- treating the precursor film to form an intermediate of a superconductor film, the intermediate comprising a fluoride of the alkaline earth metal, the intermediate of the superconductor film having a thickness of at least about 1 micrometers and the superconductor film having a critical current density of at least about 1×106 amperes per square centimeter;
- and
- treating the intermediate to produce the superconductor film;
- the superconductor film comprising the rare earth metal, the alkaline earth metal and copper;
- wherein the carboxylate salt of the rare earth metal is a salt selected from the group consisting of halogenated yttrium acetates and non-halogenated yttrium acetates and the fluorinated carboxylate salt of the alkaline earth metal is barium trifluoroacetate.
6 more elements
Dependencies are inferred from the claim text.