Process for fabricating article comprising refractory dielectric

Details Process for fabricating article comprising refractory dielectric Process for fabricating article comprising refractory dielectric

1998-08-27

2000-03-28

Vincent, Sean

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

Process of manufacturing optical fibers, waveguides, or...

65 172, 65 61, 65104, 65120, 65436, C03B 2900

Patent

active

060416238

ABSTRACT:
The smoothness of refractory dielectric bodies, particularly silica sol-gel bodies, is substantially improved by a relatively straightforward treatment. In particular, the surface of the body is treated with a plasma fireball, such as induced by a plasma torch. The treatment is able to reduce the roughness, as measured by RA, in overcladding tubes formed by a sol-gel process by at least a factor of 2, typically at least a factor of 5. It is also possible to improve the smoothness of silica tubes that are drawn from a billet. Typically, the process reduces the roughness of silica bodies to an RA of about 1 microinch or less.

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