Glass amorphous inorganic non-metallic materials, generally using a variety of inorganic minerals (such as quartz sand, borax, boric acid, barite, barium carbonate, limestone, feldspar, soda, etc.) as the main raw materials, and add a small number of auxiliary raw materials made. Its main components are silica and other oxides.
The chemical composition of ordinary glass is Na2SiO3, CaSiO3, SiO2 or Na2O Cao 6sio2 and so on, the main ingredient is silicate complex salt, is an irregular structure of amorphous solids. Widely used in buildings, used to separate wind and light, belong to the mixture. A colored glass that has been mixed with oxides or salts of some metals, and tempered by a physical or chemical method. Sometimes some transparent plastics (such as PMMA) are also called plexiglass.