Quartz glass removal time - quartz sight glass
The time of removing the base of quartz sight glass depends on the preparation process, size, size, and temperature of the quartz sight glass.
In the condition of normal melting, that is, oxidation or neutrality, such as SiCl4 as raw material
Oxyhydrogen flame as the heat source of high temperature hydrolysis vapor deposition of quartz glass mirrors and crystal as raw material, oxyhydrogen flame as the heat source mixing melting quartz glass mirrors in most of the base was in the state of products, size large, medium and even longer it is difficult to be the base of all. Usually, the 0.5~1.0mm thick synthetic gas and fused silica glass lenses can be removed at 50% or so after 140h or N2 and 1050 degrees.
But in the reduction of hydrogen rich melting quartz sight glass such as H2 as the protective gas continuous furnace melting quartz glass mirror, due to the existence of oxygen defects based on metastable state of quartz sight glass, it is easy to spread out H2, such as smelting fused silica glass with the thickness of 1~1.5mm tube in the mirror take off dry N2, vacuum or flow of 1050 DEG C, after 2H can emerge more than 90% of the base. Similarly, if the quartz glass mirrors are synthesized or refined under the reducibility of hydrogen rich, the same deoxidation can also be greatly removed.

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