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US 6,669,774 B1Granted
Methods and compositions for making a multi-layer article
AssigneeAmerican Superconductor Corporation
InventorsWei Zhang, Edward J. Siegal, Martin W. Rupich, Qi Li
Life of this patent
Estimating the term…
Abstract
The invention relates to methods and compositions for making a multi-layer article. The compositions can be used in relatively fast methods which can superconductor material intermediates that have relatively few cracks and/or blisters. The compositions can have relatively low water contents.
Claims86
A method, comprising:
- disposing a solution on a surface of a first layer, the solution including a first salt of a first metal, a second salt of a second metal and a third salt of a rare earth metal, at least one of the first, second and third salts being a trifluoroacetate salt;
- and
- treating the solution for less than about five hours to form a layer of an intermediate comprising a metal oxyfluoride, the layer of the intermediate having a surface adjacent the surface of the first layer and the layer of the intermediate having a plurality of volume elements,
- wherein defects contained within the layer of the intermediate comprise less than about 20 percent of any volume element of the layer of the intermediate defined by a projection of one square centimeter of the surface of the layer of the intermediate, and the layer of the intermediate is free of any defect having a maximum dimension of greater than about 200 microns.
1 more element
A method, comprising:
- disposing a solution on a surface of a first layer, the solution including water, a first salt of a first metal, a second salt of a second metal and a third salt of a rare earth metal, at least one of the first, second and third salts being a trifluoroacetate;
- and
- treating the solution to form an intermediate comprising a metal oxyfluoride,
- wherein the solution has a water content of less than about 50 volume percent.
1 more element
A method, comprising:
- disposing a solution on a surface of a first layer, the solution including a first salt of a first metal, a second salt of a second metal and a third salt of a rare earth metal, at least one of the first, second and third salts being a trifluoroacetate salt;
- and
- treating the solution for less than about five hours to form an intermediate comprising a metal oxyfluoride, the intermediate being capable of undergoing further processing to provide a superconductor material having a critical current density of at least about 5×105 Amperes per square centimeter.
Dependencies are inferred from the claim text.