Fabrication of high-silica glass article

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

1988-09-19

1989-06-20

Kellogg, Arthur

Glass manufacturing

Processes

Forming product or preform from molten glass

65 311, 65 182, 65 184, 65901, 65DIG16, 264 15, 423338, 423341, C03B 37016

Patent

active

048406538

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.

REFERENCES:
patent: 4323381 (1982-04-01), Matsuyama et al.
patent: 4419115 (1983-12-01), Johnson, Jr. et al.
patent: 4495297 (1985-01-01), Puyane et al.
patent: 4605428 (1986-08-01), Johnson, Jr. et al.
patent: 4680046 (1987-07-01), Matsuo et al.
patent: 4707174 (1987-11-01), Johnson, Jr. et al.

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