Germanium chloride and siloxane feedstock for forming silica glass and method

A kind of technology of germanium chloride and siloxane

Inactive Publication Date: 2000-07-05
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This existing method is complex and creates production problems

Method used

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  • Germanium chloride and siloxane feedstock for forming silica glass and method
  • Germanium chloride and siloxane feedstock for forming silica glass and method
  • Germanium chloride and siloxane feedstock for forming silica glass and method

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Embodiment Construction

[0040] use the following table figure 1 with 2 The system and apparatus shown for the preparation of GeO-doped 2 SiO 2 soot. High-purity liquid octamethylcyclotetrasiloxane containing at least 95% by weight octamethylcyclotetrasiloxane is pumped from vessel 20 into a ramped flash tank heated to a temperature above the boiling point of octamethylcyclotetrasiloxane. Steamer 26. Octamethylcyclotetrasiloxane vapor is delivered to conversion site 30 by nitrogen carrier gas from nitrogen source 28 . Feed pipes 32, 50 and 40 and pipe fittings 38 and 42 are made of stainless steel pipe. These pipes are heated to 190°C. Oxygen heated to about 200° C. is delivered by oxygen source 34 and heated tubing 36 to connection 38 . High-purity GeCl 4 The steam is mixed with octamethylcyclotetrasiloxane at feed connection 42 . GeCl 4 Steam from GeCl 4 Evaporator 44 supply. GeCl 4 The evaporator 44 consists of a GeCl 4 Bubbler. Will be packed in container 48 containing at least 99% ...

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Abstract

Disclosed is a method of making optical waveguide preforms and optical waveguides which may be drawn to a fiber. A silica forming feedstock which includes a mixture of siloxane and germanium chloride and an optical waveguide preform manufacturing apparatus is also disclosed. Further disclosure includes the mixing prior to deposition and use of high purity siloxane with high purity germanium chloride to produce germanium doped silica. The delivery lines for the feedstock to the deposition side may be heated to 175 DEG C-200 DEG C.

Description

field of invention [0001] The present invention relates to quartz raw material compositions. More particularly, the present invention relates to quartz-forming materials and methods of making optical waveguide preforms. Background of the invention [0002] Many methods are known for the preparation of metal oxides from various starting materials. These methods require a feedstock and means to catalyze the oxidation and combustion of the feedstock to convert the feedstock into fine agglomerates called soot. This soot can be heat treated to form high-purity glass products. This process is usually carried out using a dedicated conversion site unit comprising a flame generating burner. [0003] In the past, silicon tetrachloride has been used as the main silicon-containing raw material that can be converted into quartz. The use of silicon tetrachloride as a quartz raw material provides high purity quartz glass and has been the preferred industri...

Claims

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Application Information

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IPC IPC(8): C03B8/04C03B19/14C03B37/014C03B37/018
CPCC03B19/1415C03B2207/32C03B2201/31C03B37/01413C03B2207/81C03B37/014
Inventor J·L·布莱克韦尔L·A·穆尔
Owner CORNING INC
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