Method of manufacturing a fluorine-doped silica powder

Details Method of manufacturing a fluorine-doped silica powder Method of manufacturing a fluorine-doped silica powder

2005-07-12

2005-07-12

Griffin, Steven P. (Department: 1731)

Glass manufacturing

Processes

Self-supporting particle making

C065S397000, C423S335000

Reexamination Certificate

active

06915664

ABSTRACT:
The invention relates to a method of doping silica with fluorine. The method described comprises mixing a powder of silica granules with a solid fluorine compound, thermally decomposing the solid fluorine compound under an inert atmosphere, and densifying the granules to obtain dense grains of doped silica. It is preferable to use ammonium bifluoride. The invention is applicable to preparing high index silica glass, in particular for fabricating optical fiber preforms.

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Material Safety Data Sheet: Ammonium Bifluoride, 5 pages retrieved from online Sep. 15, 2004.
Timokhin A R et al: “Chemical Reaction of Ammonium Bifluoride with Quartz Glass” Glass and Ceramis, vol. 42, No. 5-6, May 1985, pp. 267-269.

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