Sol-gel process for the production of manufactures containing an incompressible insert and manufactures thereby obtained
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United States of America Patent
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Oct 5, 2004
Grant Date -
N/A
app pub date -
Sep 6, 2001
filing date -
Mar 8, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sol-gel process is described that allows dry gels to be produced, and where necessary, the corresponding dense vitreous bodies, around an incompressible insert. A particular feature of the process is the step of rotating a container holding the sol and incompressible insert throughout the gelling step under such conditions that a wet gel adhering to the insert is produced, which is then dried. The process is useful particularly for the production of preforms for optical fibers, which are also claimed.
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