Gray quartz tube and preparation method thereof

Abstract

The invention provides a gray quartz tube and a preparation method thereof. The gray quartz tube is prepared from, by weight, 0.01-0.03 part of high-purity potassium oxide, 0.01-0.03 part of high-purity sodium oxide, 0.02-0.04 part of high-purity aluminum oxide, 0.03-0.05 part of high-purity praseodymium oxide, 0.03-0.05 part of high-purity vanadium oxide and 99.0-99.5 parts of high-purity quartz sand with the impurity content smaller than 30 ppm. The gray quartz tube can be directly produced and prepared, a good coloring effect is achieved, and the colorless quartz tube does not need to be subjected to spraying coloring treatment. Meanwhile, mixed acid prepared from hydrochloric acid, hydrofluoric acid and nitric acid is adopted, during high-temperature baking, pollution to the surrounding is reduced, and the service cycle of a smelting furnace is prolonged by one time.

Description

technical field [0001] The invention relates to a quartz tube, in particular to a gray quartz tube and a preparation method thereof. Background technique [0002] At present, due to its excellent physical and chemical properties, quartz tubes are widely used in various fields such as electric light sources, semiconductors, optical communications, military industry, metallurgy, building materials, chemistry, machinery, electricity, and environmental protection. The temperature changes, the quartz tube is heated to about 1100 ° C, and it will not burst when it is placed in room temperature water; the electrical insulation performance is good, it is an excellent electrical insulation material, and it has good insulation performance even at high temperatures, but the existing quartz tube The ingredients of the pipe are all dissolved and mixed with nitrates, and then baked at high temperature. The nitrogen oxides decomposed by nitrates at high temperatures will cause serious air ...

AI Technical Summary

Problems solved by technology

[0002] At present, due to its excellent physical and chemical properties, quartz tubes are widely used in various fields such as electric light sources, semiconductors, optical communications, military industry, metallurgy, building materials, chemistry, machinery, electricity, and environmental protection. The temperature changes, the quartz tube is heated to about 1100 ° C, and it will not burst when it is placed in room temperature water; the electrical insulation performance is good, it is an excellent electrical insulation material, and it has good insulation performance even at high temperatures, but the existing quartz tube The ingredients of the pipe are all dissolved and mixed with nitrate, and baked at high temperature. The nitrogen oxides decomposed by nitrate at high temperature are very serious to air pollution, and reduce the production cycle of the continuous furnace.

At the same time, the quartz tubes produced by the production method of quartz tubes in the prior art are all colorless quartz glass tubes, and the production process has poor controllability and high hydroxyl content, which cannot meet the needs of some special industries. For intermittent production, the production efficiency is low. When gray quartz tubes are needed, the colorless quartz tubes are coated to make outer-coated gray quartz tubes; not only the process is complicated, but the quality is not easy to control