Compared with ordinary silicate glass, transparent fused silica glass exhibits excellent spectral transmittance across the entire wavelength range. Its infrared spectral transmittance is higher than that of ordinary glass; in the visible spectrum, fused silica glass also boasts relatively high transmittance. Especially in the short-wave ultraviolet spectral region, its spectral transmittance is far superior to that of other types of glass.
Spectral transmittance is affected by three factors: reflection, scattering, and absorption. The reflectivity of fused silica glass is generally 8%, slightly higher in the ultraviolet region and lower in the infrared region. Therefore, the transmittance of fused silica glass generally does not exceed 92%. The scattering of fused silica glass is minimal and can generally be neglected. Spectral absorption is closely related to the impurity content and production process of fused silica glass; the transmittance in the wavelength band below 200 nm indicates the content of metallic impurities; absorption at 240 nm reflects the quantity of oxygen-deficient structures; absorption in the visible band is caused by the presence of transition metal ions; and the absorption peak at 2730 nm is attributed to hydroxyl groups, which can be used to calculate hydroxyl content.
The formation of quartz plates is a result of the extremely high viscosity of its melt at high temperatures. Quartz plates are widely used in manufacturing semiconductors, electric light sources, semiconductor communication devices, lasers, optical instruments, laboratory equipment, electrical devices, medical equipment, as well as high-temperature and corrosion-resistant chemical instruments. They also find applications in the chemical, electronics, metallurgy, building materials, and national defense industries.
The quartz plates produced by us feature high precision, zero bubbles, flat and smooth surfaces, excellent corrosion resistance, and superior light transmittance. They are particularly suitable for observation windows in optical instruments used in the optics, electronics, chemical, and military industries.