Sol-gel process for producing a dried gel adhering to an...

Details Sol-gel process for producing a dried gel adhering to an... Sol-gel process for producing a dried gel adhering to an...

C - Chemistry, Metallurgy

03

B

C03B 37/016 (2006.01) C03B 19/12 (2006.01)

Patent

CA 2366247

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.

L'invention concerne un procédé sol-gel permettant de produire des gels secs, ainsi que, si nécessaire, les corps vitreux denses correspondants, autour d'une insertion incompressible. Une étape particulière de ce procédé consiste notamment à faire pivoter un récipient contenant le sol et l'insertion incompressible, et ce jusqu'à une étape de gélification, dans des conditions permettant de produire un gel humide qui adhère à ladite insertion, ce gel étant ensuite séché. Ce procédé est particulièrement utile pour produire des préformes de fibres optiques, qui font également l'objet de cette invention.

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