Process for manufacturing a glass tube comprising at least one d

Details Process for manufacturing a glass tube comprising at least one d Process for manufacturing a glass tube comprising at least one d

1981-09-14

1983-11-29

Schor, Kenneth M.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 2, 65 182, 65 184, 65 17, 501 12, C03B 3701, C03B 1906

Patent

active

044179103

ABSTRACT:
A process for manufacturing a glass tube, comprising at least one doped silica layer, wherein the layer is formed by forming a gel in situ, by the atomization of a hydrolyzing agent, onto a layer of a gelable liquid containing an alkoxy silane on a cylindrical mandrel rotated in a centrifuge, the gelable liquid and/or hydrolyzing agent containing a doping element, whereafter the resulting gel layer is subjected, after the withdrawal of the mandrel, to at least one thermal treatment to dry the gel and convert it into doped vitreous silica. The process can be applied to the production of preforms for the manufacture of optical fibers.

REFERENCES:
patent: 2268589 (1942-01-01), Heany
patent: 3853520 (1974-12-01), Rau
patent: 3853521 (1974-12-01), Greenwood
patent: 4217027 (1980-08-01), MacChesney et al.
patent: 4235616 (1980-11-01), Siegfried
patent: 4242375 (1980-12-01), Shiraishi et al.
patent: 4253863 (1981-03-01), Iyengar
patent: 4263032 (1981-04-01), Sinclair et al.
patent: 4314837 (1982-02-01), Blankenship

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