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US 8,227,082 B2Granted
Faceted ceramic fibers, tapes or ribbons and epitaxial devices therefrom
AssigneeUT-Battelle, LLC
InventorAmit Goyal
Life of this patent
Estimating the term…
Abstract
A crystalline article includes a single-crystal ceramic fiber, tape or ribbon. The fiber, tape or ribbon has at least one crystallographic facet along its length, which is generally at least one meter long. In the case of sapphire, the facets are R-plane, M-plane, C-plane or A-plane facets. Epitaxial articles, including superconducting articles, can be formed on the fiber, tape or ribbon.
Claims22
An article, comprising:
- a single-crystal, non-planar, ceramic fiber, tape or ribbon having at least one crystallographic facet along its length;
- at least one non-superconducting epitaxial device layer of another material on said facet;
- and,
- at least one epitaxial buffer layer of an oxide, carbide, nitride or boride or combinations thereof interposed between said fiber, tape or ribbon and said epitaxial device layer of another material.
1 more element
An article, comprising:
- a single-crystal, non-planar, ceramic fiber, tape or ribbon having at least one crystallographic facet along its length;
- at least one non-superconducting epitaxial device layer of another material on said facet;
- and,
- wherein said tape or ribbon is sapphire or Al2O3 based, and said facet comprises an A-plane, R-plane, M-plane or a C-plane facet.
1 more element
An article, comprising:
- a single-crystal, non-planar, ceramic fiber, tape or ribbon having at least one crystallographic facet along its length;
- and,
- at least one non-superconducting epitaxial device layer of another material on said facet, said epitaxial device layer comprising at least one selected from the group consisting of an electrical, electronic, optical, magnetic, electromagnetic and an electro-optical device layer said epitaxial device layer comprising at least one selected from the group consisting of a solid state lighting device and a photovoltaic device.
An article, comprising:
- a single-crystal, non-planar, ceramic fiber, tape or ribbon having at least one crystallographic facet along its length;
- and,
- at least one non-superconducting epitaxial device layer of another material on said facet, said epitaxial device layer comprising a semiconductor layer selected from the group consisting of indirect bandgap semiconductors, direct bandgap semiconductors and multiband semiconductors.
A method for forming ceramic fibers, tapes or ribbons, comprising the steps of:
- providing a ceramic seed having an orientation and shape and including a desired facet;
- securing said seed to a pulling mechanism, and
- growing said fiber, tape or ribbon beginning from said seed using a melt to form a ceramic fiber, tape or ribbon having at least one crystallographically well-defined facet, and
- forming at least one non-superconducting epitaxial layer on said fiber, tape or ribbon.
1 more element
A method for forming ceramic fibers, tapes or ribbons, comprising the steps of:
- providing a ceramic seed having an orientation and shape and including a desired facet;
- securing said seed to a pulling mechanism;
- growing said fiber, tape or ribbon beginning from said seed using a melt to form a ceramic fiber, tape or ribbon having at least one crystallographically well-defined facet;
- forming at least one non-superconducting epitaxial layer on said fiber, tape or ribbon;
- and,
- forming at least one additional epitaxial layer on said fiber, tape or ribbon, said additional epitaxial layer comprising a high temperature superconducting layer.
3 more elements
Dependencies are inferred from the claim text.