Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Nonresinous material only
Patent
1998-06-15
2000-06-27
Fiorilla, Christopher A.
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Nonresinous material only
26421111, 264299, 264623, B29D 1100
Patent
active
060803398
ABSTRACT:
The invention is a sol-gel extrusion process which allows fabrication of both thick and thin wall tubes. For example, the process is capable of preparing silica overcladding tubes in a manner easier than sol-gel casting processes, and also capable of preparing relatively thin substrate tubes, which are difficult to cast. According to the invention, a silica dispersion containing a stabilizing agent is provided, a gelling agent is added to the dispersion to induce gellation, and the resultant gel is extruded into a silica body, in the substantial absence of polymeric material from the gel. Substantially avoiding the inclusion of such polymeric material in overcladding and substrate tubes offers significant commercial advantages by reducing the time and energy required to remove organic materials from the tube bodies, by reducing environmental impact, and by reducing the amount of impurities introduced in the tubes.
REFERENCES:
patent: 4217027 (1980-08-01), MacChesney et al.
patent: 4262035 (1981-04-01), Jaeger et al.
patent: 4682995 (1987-07-01), Clasen
patent: 4685946 (1987-08-01), Derks et al.
patent: 4775401 (1988-10-01), Fleming et al.
patent: 4816051 (1989-03-01), Clasen et al.
patent: 4902328 (1990-02-01), Knauff et al.
patent: 4909816 (1990-03-01), MacChesney et al.
patent: 4940675 (1990-07-01), Bohlayer et al.
patent: 5160455 (1992-11-01), Clark et al.
patent: 5240488 (1993-08-01), Chandross et al.
patent: 5304331 (1994-04-01), Leonard et al.
"Preparation of High-Purity Silica glasses by Sintering of Colloidal Particles", by Clasen, R., International Journal of Glass Science and Technology, vol. 60, pp. 125-132 (1987).
"Fiber Drawing and Strength Properties", by DiMarcello, F. V. et al., Optical Fiber Communications, vol. 1, Edited by Li, T., Academic Press Inc., pp. 179-249.
Fleming Debra Anne
Hubbauer Philip
Johnson, Jr. David Wilfred
MacChesney John Burnette
Stockert Thomas Edward
Fiorilla Christopher A.
Lucent Technologies - Inc.
Rittman Scott J.
LandOfFree
Process for fabricating silica article utilizing sol-gel extrusi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for fabricating silica article utilizing sol-gel extrusi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for fabricating silica article utilizing sol-gel extrusi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1781524