The relationship between glass composition, structure and properties is discussed
1. Ordinary glass is the soda-lime calcium system glass, such as architectural glass, automobile glass, daily glass and so on, the main component is silica sodium oxide calcium oxide iron oxide alumina oxide and so on. These chemical components mainly by the quartz sand, soda ash, limestone and other minerals formed after melting, it also felt that the glass belongs to an amorphous material (non-crystalline state), from the microscopic side of the material structure is in a small range Is a rule to follow, follow a certain fixed structure, a large range is chaotic, no rules to follow.
3, if the subsequent processing of different glass can lead to some changes in glass performance, such as tempered glass is to use the glass when the heat stress to offset the impact of external objects; coated glass is the use of surface coating oxide film Used in the solar industry
2, and then return to the chemical composition of view, each glass has a different formula, each formula led to the production of glass with different properties, such as the relatively high content of silica glass, its nature is bound to tend to quartz glass , That is, the thermal expansion coefficient is small, the density is low, the hardness is high, the thermal conductivity is low, etc .; if the composition of the alumina in the glass is high, it has good mechanical properties, and if the composition of the iron oxide is particularly high, , And even even add metal oxide to form a different color glass, if the iron oxide content is very low, can be used in high transmittance of solar glass and optical properties of excellent optical glass, etc., if the introduction of very low in the formula Metal oxide and add a certain amount of rare earth, you can produce liquid crystal glass, we can see that different chemical composition can be different properties of different types of glass.
