Method for producing low-hydroxy-group squartz glass tube
A kind of quartz glass tube, technology of production method
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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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