The dehydroxylation time of quartz glass is influenced by several factors, including the manufacturing process, the size of the glass, and the atmosphere and temperature used during dehydrogenation. Under normal melting conditions, such as in an oxidizing or neutral atmosphere, materials like SiCl4 are commonly used. In this case, the hydroxyl groups present in the glass may not be completely removed, especially in larger pieces. When quartz glass is produced using an oxyhydrogen flame, which involves high-temperature hydrolysis and vapor deposition, the resulting material often contains a significant amount of hydroxyl groups. Even after dehydroxylation, it can be challenging to eliminate all of these groups, particularly in thick sections. For example, synthetic or gas-refined quartz glass sheets that are 0.5 to 1.0 mm thick can achieve about 50% hydroxyl removal after 140 hours under vacuum or dry N2 at 1050°C. After this period, the dehydroxylation rate tends to stabilize and no longer increases significantly. On the other hand, quartz glass melted in a hydrogen-rich reducing atmosphere—such as in a continuous furnace where H2 is used as a protective gas—can undergo more effective dehydroxylation. This is because the presence of hydrogen helps stabilize and release the hydroxyl groups, especially when oxygen defects are present. As a result, a 1 to 1.5 mm thick fused quartz tube can lose over 90% of its hydroxyl content within just two hours under similar vacuum or dry N2 conditions at 1050°C. This method is particularly effective for quartz glass produced in a hydrogen-rich environment, whether through synthesis or gasification. By applying the right dehydroxylation conditions, the removal of hydroxyl groups can be significantly enhanced compared to traditional methods. Modular Mobile Home,Prefab Mobile Homes,portable mobile home,trailer homes Zhengzhou guan hao yong International Trade Co., , https://www.homepipes.com