METHOD FOR PRODUCING SYNTHETIC QUARTZ GLASS AND QUARTZ GLASS FOR USE AS CLADDING MATERIAL OF AN OPTICAL FIBER

摘要

A known method for producing synthetic quartz glass comprises: (a) reacting a carbonic silicon compound-containing raw material with oxygen in a reaction zone into SiO2 particles, (b) precipitating the SiO2 particles on a sedimentation area by forming a porous SiO2 soot body containing hydrogen and hydroxyl groups, (c) drying the porous SiO2 soot body, and (d) glazing to the synthetic quartz glass by heating the soot body up to a glazing temperature. In order to facilitate cost-efficient production of quartz glass by means of pyrolysing or hydrolysing a carbon-containing silicon compound using a carbon-containing raw material, the invention describes the production of a soot body with a carbon content within the range of 1 ppm by weight to 50 ppm by weight.

主权项

1. A method for producing synthetic quartz glass, said method comprising:
(a) reacting a feedstock containing a carbon-containing silicon compound with oxygen in a reaction zone so as to obtain SiO2 particles, (b) depositing the SiO2 particles on a deposition surface so as to form a porous SiO2 soot body containing carbon and hydroxyl groups, (c) drying the porous SiO2 soot body, and (d) vitrifying the soot body by heating to a vitrification temperature so as to form the synthetic quartz glass,
wherein the soot body has a carbon content in the range of 1 wt. ppm to 50 wt. ppm.