1. It can be used at 1180 ℃ for a long time, and the maximum service temperature can reach 1450 ℃ in a short time
2. Essential properties: the mechanical properties of quartz glass are better than those of glass and ceramics. The density is 2.2g/cm3, the elastic modulus is 700 * 103kg / cm3, the tensile strength is - 500kg / cm3, the hardness is 5.5-6.5, and the strength reaches the maximum at 1180 ℃.
3. Thermal performance: 5.4 * 10-7, because the thermal expansion coefficient of quartz glass is very small, which is equivalent to 1 / 12-1 / 20 of ordinary glass, and the thermal expansion coefficient of the average expansion number at 0-1000 ℃ is very small, so it has a strong ability to withstand the temperature difference between cold and hot changes, and generally can withstand the rapid cooling and heating test at 1200-15 ℃
4. Quartz glass is a good acid resistant material; in addition to hydrofluoric acid and hot phosphoric acid above 300 degrees, it is resistant to corrosion of sulfuric acid, nitric acid, hydrochloric acid, aqua regia, neutral salts, carbon and sulfur at high temperature. Its chemical stability is 30 times that of acid resistant ceramics and 150 times of that of nickel chromium alloy and ceramic. White rust steel has high temperature resistance, heat shock resistance and small thermal expansion coefficient, In particular, the chemical stability at high temperature is incomparable to any other material,
5. The electrical insulation performance of quartz glass is excellent; at room temperature, its resistance is 100 times that of ordinary glass, the dielectric loss to all frequencies is very small, and the insulation and withstand voltage strength are large. Its quartz glass is an excellent insulating material,
6. Optical properties: the quartz glass tube has good light transmission performance in the whole spectrum band from ultraviolet to infrared. The visible light transmittance is more than 95%, especially in the ultraviolet spectral region, the maximum transmittance is more than. 85%,