Fabrication of high-silica glass article

Details Fabrication of high-silica glass article Fabrication of high-silica glass article

C - Chemistry, Metallurgy

03

B

49/78.1

C03B 37/016 (2006.01) C03B 32/00 (2006.01) C03B 37/014 (2006.01) C03B 37/018 (2006.01) C03C 1/00 (2006.01) C03C 3/06 (2006.01)

Patent

CA 1318131

- 23 - FABRICATION OF HIGH-SILICA GLASS ARTICLE Abstract Incorporation of fluorine into a porous silica body, such as an unsintered body produced by a sol-gel method, by VAD or OVPO, reduces or eliminates bubble or pore formation upon re-heating of the glass formed by sintering of the porous material. Effective fluorine concentrations are between 0.01 and 5% by weight. The invention can be used advantageously in producing preforms and optical fiber.

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