Glass is an ancient building material that has been around since ancient Egypt. Along with the common development of human society, the glass industry has created a variety of unique functional glass, which has continued to thrive the glass family, such as bulletproof glass, photovoltaic glass, vacuum glass, etc., all play an irreplaceable role in their respective fields. We will introduce how glass is formed.
Glass: a relatively transparent solid substance that forms a continuous network structure when melted, a silicate non-metallic material that gradually increases in viscosity and hardens without crystallizing during cooling. The composition of ordinary glass chemical oxides (Na2O · CaO 6SiO2), whose main component is silicon dioxide. It is widely used in buildings, used to block wind and light, and belongs to a mixture.
The characteristics of glass determine that it can be subjected to a variety of processing methods to form a rich shape. The main raw materials for glass production are glass forming bodies, glass regulators and glass intermediates, and the rest are auxiliary raw materials. The main raw materials are the introduction of glass formation Network oxides, intermediate oxides and network external oxides; auxiliary raw materials include clarifiers, fluxes, opacifiers, colorants, decolorants, oxidants and reducing agents.
The glass production process mainly includes: ① raw material pre-processing. Crush the block-shaped raw materials (quartz sand, soda ash, limestone, feldspar, etc.), dry the wet raw materials, and remove iron-containing raw materials to ensure the quality of the glass. ③ Melting. The glass batch is heated in a pot kiln or crucible kiln at a high temperature (1550 ~ 1600 degrees) to form a uniform, non-bubble, and liquid glass that meets the molding requirements. ④ Molding. Processing liquid glass Products with the required shape, such as flat plates, various utensils, etc. ⑤ Heat treatment. Through annealing, quenching and other processes, eliminate or generate stress, phase separation or crystallization inside the glass, and change the structural state of the glass.