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Quasi-containerless glass formation method and apparatusGlass rods or fibers are prepared from a polycrystalline rod by heating a short section of the rod in a first furnace to form a molten zone of the rod, heating a second short section of the rod in a second furnace to form a second molten zone and gradually moving the furnaces apart from one another to form an elongated molten float zone, which is cooled in its midsection to produce a glass rod between the molten zones. In another embodiment a single moving furnace assembly and a precursor rod with compositional gradient sections, are used, and the moving furnace traverses the rod so that the molten portion is drawn out to a degree whereby a fiber of ultrapure glass is formed.
Document ID
19870011678
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Naumann, Robert J. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Ethridge, Edwin C. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 13, 2013
Publication Date
March 31, 1987
Subject Category
Nonmetallic Materials
Report/Patent Number
Patent Number: US-PATENT-4,654,065
Patent Number: NASA-CASE-MFS-28090-1
Patent Application Number: US-PATENT-APPL-SN-805012
Accession Number
87N21111
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-4,654,065|NASA-CASE-MFS-28090-1
Patent Application
US-PATENT-APPL-SN-805012

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