2. Mechanical properties: The mechanical properties of Shi Ying glass are better than those of glass and ceramics, with several main indexes: density 2.2g/cm3, elastic modulus 700* 103kg/cm3, tensile strength -500kg/cm3, hardness 5.5-6.5, annealing temperature strength1180.
3. Thermal performance: 5.4* 10-7 Because the thermal expansion coefficient of Shi Ying glass is extremely small, which is equivalent to that of ordinary glass112-1/20, and the average expansion number at 0- 1000℃ is extremely small, so,