1, high temperature; quartz glass softening point temperature of about 1730 degrees. Can be used at 1180 degrees for a long time, a short time the maximum use temperature of 1450 degrees Celsius
2. confidential performance: quartz glass mechanical properties better than glass and ceramics, several main indexes of 2.2g/cm3 density, elastic modulus, tensile strength of 700 * 103kg/cm3, 500kg/cm3, dissolved hardness 5.5-6.5, reached the strength at 1180 DEG C when the annealing temperature was maximum, which is a major characteristic of quartz glass.
3. thermal properties: 5.4 * 10-7, the quartz glass, small thermal expansion coefficient, equivalent to ordinary glass 1/12-1/20 at 0-1000 DEG C for the average number of expansion coefficient of thermal expansion is minimal, so the temperature tolerance of it under the cold and hot shock is quite strong, can withstand 1200-15 degrees of cold and hot test
4. quartz glass is good, except hydrofluoric acid resistant materials; and more than 300 degrees hot phosphoric acid, under high temperature, which is resistant to sulfuric acid, nitric acid, hydrochloric acid, aqua regia, neutral salts, carbon and sulfur erosion, equivalent to 30 times its chemical stability, acid resistant ceramic, the equivalent of nichrome gold and ceramic 150. Times of stainless steel, high temperature, thermal shock, thermal expansion coefficient is very small, the chemical stability, especially at high temperature. Any other materials can not be compared,
5. quartz glass's electrical insulation performance is excellent; at room temperature, its resistance equivalent to 100 times of ordinary glass, the dielectric loss of all frequencies is very small, insulation, compressive strength. Its quartz glass is an excellent insulating material,
6. optical properties: quartz glass tube in the ultraviolet to the infrared spectral bands have good light transmittance, visible light transmittance of more than 95%, especially through the ultraviolet spectral region, the maximum transmission rate can reach more than.85%,
7. specific heat and thermal conductivity; the average heat capacity 0---100 C quartz glass is 722 J / kg, K0, 0---500 C 964 joules of /kg, Ko, 0---900 C 1052 joules of /kg, K0, thermal conductivity of quartz glass tube was 20 DEG C for 1,38w/kg, M., m, 1,55w/kg to 200 DEG, 400 DEG C for 1,84w/kg. M, 950 degrees 2,68w/kg, M
