FIELD: construction.
SUBSTANCE: invention relates to silicate glass for making residential buildings and industrial facilities. This invention provides flat glass containing: B2O3 0-3.9 wt%, Na2O - 0.01-14 wt%, Fe2O3 - 0.01-5 wt%, F2O - 0 wt%, MgO 7-22.2 wt%, Al2O3 - 0.01-39 wt%, content of SiO2 is 1.9-4.1 times more than content of CaO, content of CaO is 1.0-1.8 times more than content of MgO. Lower limit of temperature of annealing of said glass is 550-710 °C; varying thickness of glass is less than 0.3 mm, coefficient of water absorption - in range from 0 to 0.3 %, its bending strength reaches 50-180 MPa.
EFFECT: technical result is increased strength of glass.
7 cl, 3 tbl, 3 dwg, 7 ex
