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Method for producing low-hydroxy-group squartz glass tube

A kind of quartz glass tube, technology of production method

Inactive Publication Date: 2006-10-25
单军成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The quartz glass tubes produced by the production method of quartz glass tubes in the prior art are all colorless quartz glass tubes. The controllability of the production process is poor, and the hydroxyl content is high, which cannot meet the needs of some special industries. For intermittent production, the production efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1. A method for producing low hydroxyl quartz glass tube, the steps are as follows:

[0022] (1) Raw material processing, select SiO-containing 2 =99.90%, impurity content is 30ppm, 60 mesh high-purity quartz powder, mixed with 0.1% coloring agent vanadium triphosphide by weight of high-purity quartz powder, after mixing evenly, dry;

[0023] (2) Add the above-mentioned treated raw materials into a continuous fused quartz furnace for melting, open the vent hole at the furnace mouth to discharge gas impurities, and the melted raw materials are drawn into a blue quartz glass tube by a tractor for cutting and drawing tubes;

[0024] (3) Putting the blue quartz glass tube into a dehydration furnace for dehydration treatment to obtain a finished blue quartz glass tube.

Embodiment 2

[0025] Example 2. A method for producing low hydroxyl quartz glass tube, the steps are as follows:

[0026] (1) Raw material processing, select SiO-containing 2 = 99.99%, impurity content is 20ppm, 220 mesh high-purity quartz powder, mixed with 1.0% colorant cobalt oxide with a weight of high-purity quartz powder, mixed evenly, and dried;

[0027] (2) Add the above-mentioned treated raw materials into a continuous fused quartz furnace for melting, open the vent hole at the furnace mouth to discharge gas impurities, and the melted raw materials are drawn into a blue quartz glass tube by a tractor for cutting and drawing tubes;

[0028] (3) Putting the blue quartz glass tube into a dehydration furnace for dehydration treatment to obtain a finished blue quartz glass tube.

Embodiment 3

[0029] Example 3. A kind of production method of low hydroxyl quartz glass tube, its step is as follows,

[0030] (1) Raw material processing, select SiO-containing 2 =99.98%, impurity content is less than 20ppm, 180 mesh high-purity quartz powder, mixed with 0.4% coloring agent by weight of high-purity quartz powder, the coloring agent is cobalt oxide, after mixing evenly, add quartz continuously and dry The furnace is continuously dried, and the temperature in the drying furnace is 500°C;

[0031] (2) Add the above-mentioned treated raw materials into the continuous melting quartz furnace for melting, open the vent hole at the furnace mouth to discharge gas impurities, and sink the continuously melted raw materials into the bottom of the furnace. Colored quartz glass tube; during continuous melting, the temperature in the fused quartz furnace is kept at 1800°C.

[0032] (3) Put the blue quartz glass tube into the dehydration furnace to obtain the finished blue quartz glas...

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Abstract

The invention is a method for producing a low-hydroxyl quartz glass tube, characterized in that it selects 60-220 mesh high-purity quartz powder containing SiO2 >=99.90%, and impurities less than 30ppm, and dopes colorizing agent in 0.1-1.0% of the weight of the high-purity quartz powder, where the colorizing agent selects at least one of the divanadium triphosphate and cobalt oxide, mixed uniformly and dried; it adds the processed raw materials into a continuous melting quartz furnace and melts them, opens the gas outlet at the furnace mouth and discharges gas impurities, feeding the melted raw materials into a drawer for making tube drawing forming and draws them into blue quartz glass tubes; feeds the blue quartz glass tubes into a de-hydroxylation furnace for de-hydroxylation and obtaining the finished products. The hydroxyl content of the blue quartz glass tubes is generally lower than 1ppm and the products have good quality, and can be applied to special industries; and the process of the invention can implement continuous quartz glass tube production, having high productivity.

Description

technical field [0001] The invention relates to a production method of a quartz glass tube, in particular to a production method of a low-hydroxyl quartz glass tube. Background technique [0002] The quartz glass tubes produced by the production method of quartz glass tubes in the prior art are all colorless quartz glass tubes. The controllability of the production process is poor, and the hydroxyl content is high, which cannot meet the needs of some special industries. For intermittent production, the production efficiency is low. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a production method of a low-hydroxyl quartz glass tube with a simple production process in view of the deficiencies of the prior art, by which blue quartz glass with low hydroxyl content and good quality can be produced Tube. [0004] The technical problem to be solved by the present inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/06C03B15/14C03B20/00C03C1/04C03C4/02
CPCC03B32/00C03B17/04C03B2201/075C03C3/06
Inventor 单军成
Owner 单军成
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