Quartz glass has its unique optical properties. It can pass through far ultraviolet light, which is the best of all ultraviolet-penetrating materials. It can also pass through visible light and near infrared spectrum. Because quartz glass has high temperature resistance, very small thermal expansion coefficient, good chemical stability, bubble, fringe, uniformity and birefringence can be compared with the general optical glass, so it is an essential optical material with high stability optical coefficient in a variety of harsh situations.
Optical properties of quartz glass - ultra transparent: Quartz glass has unique optical properties, it can pass through far ultraviolet, is the best of all ultraviolet materials, but also through visible light and near infrared spectrum, thermal expansion coefficient is very small, good chemical stability, bubbles, stripes, uniformity, birefringence can be comparable to the general optical glass, Therefore, it is an essential optical material with high stability optical coefficient in a variety of harsh situations.
Mechanical properties - high pressure resistance: the mechanical properties of quartz glass are better than hard glass and ceramic, but the brittleness is poor. The main factors affecting the strength are the surface defects of glass, especially the size and depth of surface microcracks. The bending strength of fine ground quartz glass is about 0.6 times higher than that of coarse ground quartz glass. Then there are inherent defects, such as bubbles, impurities, uneven melting and residual stresses. The strength of quartz glass increases with the increase of temperature and reaches the maximum when approaching the annealing temperature.
Quartz glass has very high dielectric strength and very low conductivity commutation loss. Even at high temperature, its conductivity and dielectric loss are lower than that of general materials. It is especially suitable for high frequency and voltage insulation materials under high temperature and high mechanical stress conditions.
