Method of making hollow high temperature ceramic superconducting fibers
AssigneeOwens Corning Fiberglas Technology, Inc.
InventorJianzhong Huang
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Abstract
A hollow high temperature ceramic superconducting fiber (10, 100), a process for making the hollow fibers and an apparatus for carrying out the process are provided. The apparatus functions to simultaneously draw a molten superconducting material (16) and a molten glass material (18) into a hollow preform (25) which is heat treated to form a hollow superconducting fiber (10, 100) which is flexible and has a high electrical current carrying capacity. The glass cladding layer (14, 14') surrounds the hollow superconducting core (12).
Claims12
A process of making a hollow superconducting fiber comprising the steps of:
- providing a bushing including a first source of molten superconducting composition precursor, a second source of molten glass composition, and a gas conduit, wherein said gas conduit is positioned within said first source of molten material;
- forming a hollow preform having a core portion formed of the superconducting composition precursor and an outer layer portion formed of the glass composition by drawing said molten superconducting composition precursor from said first source such that said molten superconducting composition precursor comprises a hollow core portion, by drawing said glass composition from said second source of molten material, and by cooling said molten compositions to form said hollow preform;
- and
- heat treating the hollow preform to form a hollow superconducting fiber having a superconducting core surrounded by a glass cladding layer.
A process of making a hollow superconducting fiber comprising the steps of:
- providing a molten superconducting composition precursor in a first crucible and causing a stream of said molten superconducting composition precursor to flow from a first outlet portion of said first crucible;
- providing a molten glass composition in a second crucible and causing a stream of molten glass composition to flow from a second outlet portion of said second crucible generally surrounding said first outlet portion of said first crucible;
- ingesting gas through a gas supply conduit positioned in said molten superconducting composition precursor and through said first outlet portion of said first crucible;
- forming a hollow preform having a core formed from said stream of molten superconducting composition precursor and an outer layer formed from said stream of molten glass composition;
- and,
- heat treating said hollow preform to form a superconducting fiber having a superconducting core surrounded by a glass cladding layer.
Dependencies are inferred from the claim text.